Samsung 840 EVO with new firmware and now with interface errors. Details on my blog @ http://bit.ly/1ANrCbL

dmesg.log

[    0.578208] ata7: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff100 irq 29
[    0.578211] ata8: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff180 irq 29
[    0.581455] ehci-pci 0000:00:1a.0: cache line size of 4 is not supported
--
[    1.063919] scsi 0:0:0:0: Direct-Access     ATA      ST4000DM000-1F21 CC54 PQ: 0 ANSI: 5
[    1.065040] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.065294] sd 0:0:0:0: [sda] 7814037168 512-byte logical blocks: (4.00 TB/3.63 TiB)
--
[    1.065722] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    1.066905] ata8.00: supports DRM functions and may not be fully accessible
[    1.066985] ata8.00: ATA-9: Samsung SSD 840 EVO 250GB, EXT0DB6Q, max UDMA/133
[    1.066988] ata8.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[    1.067156] ata8.00: supports DRM functions and may not be fully accessible
[    1.067215] ata8.00: configured for UDMA/133
[    1.112966]  sda: sda1
--
[    3.358588] scsi 7:0:0:0: Direct-Access     ATA      Samsung SSD 840  DB6Q PQ: 0 ANSI: 5
[    3.359054] sd 7:0:0:0: [sdf] 488397168 512-byte logical blocks: (250 GB/232 GiB)
[    3.359524] sd 7:0:0:0: [sdf] Write Protect is off
[    3.359530] sd 7:0:0:0: [sdf] Mode Sense: 00 3a 00 00
[    3.359674] sd 7:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    3.362378]  sdf: sdf1 sdf2 sdf3 sdf4
[    3.363571] sd 7:0:0:0: [sdf] Attached SCSI disk
[    3.438240] raid6: sse2x1    5458 MB/s
--
[    3.587901] Btrfs loaded
[    3.590079] BTRFS: device label evo devid 1 transid 28033 /dev/sdf4
[    3.590388] BTRFS: device label root devid 1 transid 1074344 /dev/sdf2
[    3.637463] BTRFS info (device sdf2): disk space caching is enabled
[    3.647562] BTRFS: detected SSD devices, enabling SSD mode
--
[    3.818209] softdog: Software Watchdog Timer: 0.08 initialized. soft_noboot=0 soft_margin=60 sec soft_panic=0 (nowayout=0)
[    3.822024] BTRFS info (device sdf2): enabling auto defrag
[    3.822028] BTRFS info (device sdf2): turning on discard
[    3.822030] BTRFS info (device sdf2): disk space caching is enabled
[    3.824060] systemd[1]: Mounted Arbitrary Executable File Formats File System.
--
[    4.382828] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
[    4.384639] BTRFS info (device sdf4): enabling auto defrag
[    4.384643] BTRFS info (device sdf4): turning on discard
[    4.384644] BTRFS info (device sdf4): disk space caching is enabled
[    4.397379] [drm] PCIE GART of 1024M enabled (table at 0x0000000000274000).
--
[    4.469431] AES CTR mode by8 optimization enabled
[    4.508584] EXT4-fs (sdf1): mounted filesystem with ordered data mode. Opts: data=ordered
[    4.554893] iTCO_vendor_support: vendor-support=0
--
[   53.507353] docker0: port 1(veth49f0f84) entered forwarding state
[   64.353103] ata8.00: exception Emask 0x0 SAct 0x10 SErr 0x0 action 0x6 frozen
[   64.353110] ata8.00: failed command: WRITE FPDMA QUEUED
[   64.353117] ata8.00: cmd 61/08:20:0d:2e:90/00:00:0e:00:00/40 tag 4 ncq 4096 out
                        res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[   64.353120] ata8.00: status: { DRDY }
[   64.353125] ata8: hard resetting link
[   64.839699] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[   64.839905] ata8.00: supports DRM functions and may not be fully accessible
[   64.840233] ata8.00: supports DRM functions and may not be fully accessible
[   64.840298] ata8.00: configured for UDMA/133
[   64.840303] ata8.00: device reported invalid CHS sector 0
[   64.840318] ata8: EH complete
[   68.529514] docker0: port 1(veth49f0f84) entered forwarding state
[   96.325318] ata8.00: exception Emask 0x0 SAct 0x8000000 SErr 0x0 action 0x6 frozen
[   96.325327] ata8.00: failed command: WRITE FPDMA QUEUED
[   96.325333] ata8.00: cmd 61/08:d8:dd:2b:90/00:00:0e:00:00/40 tag 27 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[   96.325337] ata8.00: status: { DRDY }
[   96.325341] ata8: hard resetting link
[   96.811947] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[   96.812171] ata8.00: supports DRM functions and may not be fully accessible
[   96.812480] ata8.00: supports DRM functions and may not be fully accessible
[   96.812536] ata8.00: configured for UDMA/133
[   96.812541] ata8.00: device reported invalid CHS sector 0
[   96.812557] ata8: EH complete
[ 1277.278023] ata8.00: exception Emask 0x0 SAct 0xd2 SErr 0x0 action 0x6 frozen
[ 1277.278030] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1277.278037] ata8.00: cmd 61/08:08:45:aa:8f/00:00:0e:00:00/40 tag 1 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1277.278040] ata8.00: status: { DRDY }
[ 1277.278042] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1277.278048] ata8.00: cmd 61/08:20:85:6e:b1/00:00:0e:00:00/40 tag 4 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1277.278051] ata8.00: status: { DRDY }
[ 1277.278053] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1277.278066] ata8.00: cmd 61/68:30:c5:ad:cc/00:00:0c:00:00/40 tag 6 ncq 53248 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1277.278068] ata8.00: status: { DRDY }
[ 1277.278087] ata8.00: failed command: SEND FPDMA QUEUED
[ 1277.278091] ata8.00: cmd 64/01:38:00:00:00/00:00:00:00:00/a0 tag 7 ncq 512 out
                        res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1277.278093] ata8.00: status: { DRDY }
[ 1277.278098] ata8: hard resetting link
[ 1277.764687] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1277.764840] ata8.00: supports DRM functions and may not be fully accessible
[ 1277.765045] ata8.00: supports DRM functions and may not be fully accessible
[ 1277.765094] ata8.00: configured for UDMA/133
[ 1277.765099] ata8.00: device reported invalid CHS sector 0
[ 1277.765101] ata8.00: device reported invalid CHS sector 0
[ 1277.765104] ata8.00: device reported invalid CHS sector 0
[ 1277.765106] ata8.00: device reported invalid CHS sector 0
[ 1277.765134] ata8: EH complete
[ 1308.393644] ata8.00: exception Emask 0x0 SAct 0x3800 SErr 0x0 action 0x6 frozen
[ 1308.393651] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1308.393658] ata8.00: cmd 61/68:58:c5:ad:cc/00:00:0c:00:00/40 tag 11 ncq 53248 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1308.393669] ata8.00: status: { DRDY }
[ 1308.393671] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1308.393675] ata8.00: cmd 61/08:60:85:6e:b1/00:00:0e:00:00/40 tag 12 ncq 4096 out
                        res 40/00:01:06:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1308.393678] ata8.00: status: { DRDY }
[ 1308.393680] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1308.393684] ata8.00: cmd 61/08:68:45:aa:8f/00:00:0e:00:00/40 tag 13 ncq 4096 out
                        res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1308.393686] ata8.00: status: { DRDY }
[ 1308.393690] ata8: hard resetting link
[ 1308.880293] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1308.880453] ata8.00: supports DRM functions and may not be fully accessible
[ 1308.880688] ata8.00: supports DRM functions and may not be fully accessible
[ 1308.880780] ata8.00: configured for UDMA/133
[ 1308.880786] ata8.00: device reported invalid CHS sector 0
[ 1308.880789] ata8.00: device reported invalid CHS sector 0
[ 1308.880810] ata8: EH complete
[ 1695.367157] ata8.00: exception Emask 0x0 SAct 0x50008 SErr 0x0 action 0x6 frozen
[ 1695.367162] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1695.367167] ata8.00: cmd 61/08:18:a5:0b:5a/00:00:04:00:00/40 tag 3 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1695.367169] ata8.00: status: { DRDY }
[ 1695.367171] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1695.367182] ata8.00: cmd 61/30:80:fd:dd:a0/00:00:05:00:00/40 tag 16 ncq 24576 out
                        res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1695.367184] ata8.00: status: { DRDY }
[ 1695.367185] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1695.367189] ata8.00: cmd 61/08:90:ad:0b:5a/00:00:04:00:00/40 tag 18 ncq 4096 out
                        res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1695.367190] ata8.00: status: { DRDY }
[ 1695.367194] ata8: hard resetting link
[ 1695.853819] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1695.854141] ata8.00: supports DRM functions and may not be fully accessible
[ 1695.854562] ata8.00: supports DRM functions and may not be fully accessible
[ 1695.854663] ata8.00: configured for UDMA/133
[ 1695.854670] ata8.00: device reported invalid CHS sector 0
[ 1695.854673] ata8.00: device reported invalid CHS sector 0
[ 1695.854675] ata8.00: device reported invalid CHS sector 0
[ 1695.854701] ata8: EH complete
[ 2917.317939] usb 6-1.4: new high-speed USB device number 3 using ehci-pci
--
[ 2918.584552] sd 8:0:0:0: [sdg] Attached SCSI removable disk
[ 3675.245174] ata8.00: exception Emask 0x0 SAct 0x20000 SErr 0x0 action 0x6 frozen
[ 3675.245181] ata8.00: failed command: WRITE FPDMA QUEUED
[ 3675.245187] ata8.00: cmd 61/08:88:cd:a5:8e/00:00:0e:00:00/40 tag 17 ncq 4096 out
                        res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 3675.245189] ata8.00: status: { DRDY }
[ 3675.245193] ata8: hard resetting link
[ 3675.731795] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 3675.732016] ata8.00: supports DRM functions and may not be fully accessible
[ 3675.732374] ata8.00: supports DRM functions and may not be fully accessible
[ 3675.732434] ata8.00: configured for UDMA/133
[ 3675.732440] ata8.00: device reported invalid CHS sector 0
[ 3675.732467] ata8: EH complete

dmesg2.log

[    0.594764] ata7: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff100 irq 29
[    0.594767] ata8: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff180 irq 29
[    0.768477] serio: i8042 KBD port at 0x60,0x64 irq 1
--
[    1.078343] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.078372] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.079254] ata1.00: ATA-9: ST4000DM000-1F2168, CC54, max UDMA/133
--
[    1.080221] ata1.00: configured for UDMA/133
[    1.080299] ata8.00: supports DRM functions and may not be fully accessible
[    1.080391] ata8.00: ATA-9: Samsung SSD 840 EVO 250GB, EXT0DB6Q, max UDMA/133
[    1.080396] ata8.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[    1.080459] scsi 0:0:0:0: Direct-Access     ATA      ST4000DM000-1F21 CC54 PQ: 0 ANSI: 5
[    1.080591] ata8.00: supports DRM functions and may not be fully accessible
[    1.080661] ata8.00: configured for UDMA/133
[    1.228551] usb 1-1.4: new high-speed USB device number 3 using ehci-pci
--
[    3.360760] sd 4:0:0:0: [sde] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
[    3.360771] sd 7:0:0:0: [sdf] 488397168 512-byte logical blocks: (250 GB/232 GiB)
[    3.360809] sd 4:0:0:0: [sde] Write Protect is off
--
[    3.360836] sd 4:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    3.360838] sd 7:0:0:0: [sdf] Write Protect is off
[    3.360840] sd 7:0:0:0: [sdf] Mode Sense: 00 3a 00 00
[    3.360882] sd 7:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    3.360969] sd 3:0:0:0: [sdd] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB)
--
[    3.361080] sd 3:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    3.362992]  sdf: sdf1 sdf2 sdf3 sdf4
[    3.363895] sd 7:0:0:0: [sdf] Attached SCSI disk
[    3.364759] sd 4:0:0:0: [sde] Attached SCSI disk
--
[    3.624622] Btrfs loaded
[    3.626594] BTRFS: device label root devid 1 transid 1075563 /dev/sdf2
[    3.626959] BTRFS: device label evo devid 1 transid 28042 /dev/sdf4
[    3.637516] BTRFS info (device sdf2): disk space caching is enabled
[    3.645385] BTRFS: detected SSD devices, enabling SSD mode
--
[    3.834307] systemd[1]: Mounted Configuration File System.
[    3.856735] BTRFS info (device sdf2): enabling auto defrag
[    3.856738] BTRFS info (device sdf2): turning on discard
[    3.856740] BTRFS info (device sdf2): disk space caching is enabled
[    3.857341] systemd[1]: Started Remount Root and Kernel File Systems.
--
[    4.114466] systemd[1]: Mounting /evo...
[    4.116092] BTRFS info (device sdf4): enabling auto defrag
[    4.116096] BTRFS info (device sdf4): turning on discard
[    4.116097] BTRFS info (device sdf4): disk space caching is enabled
[    4.116594] systemd[1]: Started Journal Service.
--
[    4.220808] kfd kfd: Initialized module
[    4.220872] EXT4-fs (sdf1): mounted filesystem with ordered data mode. Opts: data=ordered
[    4.222100] checking generic (e0000000 760000) vs hw (e0000000 10000000)
--
[  183.682827] fuse init (API version 7.23)
[  220.375632] ata8.00: exception Emask 0x0 SAct 0x30 SErr 0x0 action 0x6 frozen
[  220.375640] ata8.00: failed command: WRITE FPDMA QUEUED
[  220.375647] ata8.00: cmd 61/08:20:dd:fd:8f/00:00:03:00:00/40 tag 4 ncq 4096 out
                        res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[  220.375650] ata8.00: status: { DRDY }
[  220.375652] ata8.00: failed command: WRITE FPDMA QUEUED
[  220.375658] ata8.00: cmd 61/08:28:f5:fe:8f/00:00:03:00:00/40 tag 5 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[  220.375661] ata8.00: status: { DRDY }
[  220.375666] ata8: hard resetting link
[  220.862282] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[  220.864209] ata8.00: supports DRM functions and may not be fully accessible
[  220.864467] ata8.00: supports DRM functions and may not be fully accessible
[  220.864520] ata8.00: configured for UDMA/133
[  220.864524] ata8.00: device reported invalid CHS sector 0
[  220.864526] ata8.00: device reported invalid CHS sector 0
[  220.864543] ata8: EH complete
[  220.982447] device veth5e51e8a entered promiscuous mode
--
[  236.045073] docker0: port 1(veth5e51e8a) entered forwarding state
[  251.361292] ata8.00: exception Emask 0x0 SAct 0x10000000 SErr 0x0 action 0x6 frozen
[  251.361299] ata8.00: failed command: WRITE FPDMA QUEUED
[  251.361305] ata8.00: cmd 61/08:e0:3d:b8:8f/00:00:03:00:00/40 tag 28 ncq 4096 out
                        res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[  251.361308] ata8.00: status: { DRDY }
[  251.361312] ata8: hard resetting link
[  251.847892] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[  251.849806] ata8.00: supports DRM functions and may not be fully accessible
[  251.850056] ata8.00: supports DRM functions and may not be fully accessible
[  251.850109] ata8.00: configured for UDMA/133
[  251.850114] ata8.00: device reported invalid CHS sector 0
[  251.850129] ata8: EH complete
[ 1014.853194] sha1_ssse3: Using AVX optimized SHA-1 implementation
--
[ 1014.972729] Key type encrypted registered
[ 1428.711344] ata8.00: exception Emask 0x0 SAct 0x400 SErr 0x0 action 0x6 frozen
[ 1428.711352] ata8.00: failed command: WRITE FPDMA QUEUED
[ 1428.711358] ata8.00: cmd 61/08:50:c5:a3:8f/00:00:0e:00:00/40 tag 10 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 1428.711361] ata8.00: status: { DRDY }
[ 1428.711366] ata8: hard resetting link
[ 1429.197743] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 1429.199716] ata8.00: supports DRM functions and may not be fully accessible
[ 1429.200086] ata8.00: supports DRM functions and may not be fully accessible
[ 1429.200161] ata8.00: configured for UDMA/133
[ 1429.200167] ata8.00: device reported invalid CHS sector 0
[ 1429.200185] ata8: EH complete
[10239.048031] ata8.00: exception Emask 0x0 SAct 0x7fffdfff SErr 0x0 action 0x6 frozen
[10239.048038] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048045] ata8.00: cmd 61/08:00:25:4d:54/00:00:09:00:00/40 tag 0 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048048] ata8.00: status: { DRDY }
[10239.048051] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048056] ata8.00: cmd 61/50:08:d5:54:54/00:00:09:00:00/40 tag 1 ncq 40960 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048059] ata8.00: status: { DRDY }
[10239.048061] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048066] ata8.00: cmd 61/08:10:6d:7b:54/00:00:09:00:00/40 tag 2 ncq 4096 out
                        res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048069] ata8.00: status: { DRDY }
[10239.048071] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048076] ata8.00: cmd 61/08:18:cd:66:97/00:00:05:00:00/40 tag 3 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048079] ata8.00: status: { DRDY }
[10239.048081] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048086] ata8.00: cmd 61/08:20:25:68:97/00:00:05:00:00/40 tag 4 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048089] ata8.00: status: { DRDY }
[10239.048091] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048096] ata8.00: cmd 61/08:28:05:6a:97/00:00:05:00:00/40 tag 5 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048098] ata8.00: status: { DRDY }
[10239.048101] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048106] ata8.00: cmd 61/08:30:bd:6f:97/00:00:05:00:00/40 tag 6 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048108] ata8.00: status: { DRDY }
[10239.048110] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048115] ata8.00: cmd 61/08:38:9d:24:95/00:00:05:00:00/40 tag 7 ncq 4096 out
                        res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048118] ata8.00: status: { DRDY }
[10239.048120] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048125] ata8.00: cmd 61/08:40:bd:d5:4b/00:00:09:00:00/40 tag 8 ncq 4096 out
                        res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048128] ata8.00: status: { DRDY }
[10239.048130] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048135] ata8.00: cmd 61/08:48:a5:e0:51/00:00:09:00:00/40 tag 9 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048138] ata8.00: status: { DRDY }
[10239.048140] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048145] ata8.00: cmd 61/08:50:25:a4:d3/00:00:06:00:00/40 tag 10 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048148] ata8.00: status: { DRDY }
[10239.048150] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048155] ata8.00: cmd 61/08:58:b5:98:48/00:00:08:00:00/40 tag 11 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048158] ata8.00: status: { DRDY }
[10239.048160] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048165] ata8.00: cmd 61/08:60:55:bb:76/00:00:05:00:00/40 tag 12 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048167] ata8.00: status: { DRDY }
[10239.048170] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048175] ata8.00: cmd 61/28:70:0d:8e:61/00:00:0e:00:00/40 tag 14 ncq 20480 out
                        res 40/00:01:06:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048177] ata8.00: status: { DRDY }
[10239.048180] ata8.00: failed command: SEND FPDMA QUEUED
[10239.048185] ata8.00: cmd 64/01:78:00:00:00/00:00:00:00:00/a0 tag 15 ncq 512 out
                        res 40/00:01:01:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048187] ata8.00: status: { DRDY }
[10239.048190] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048195] ata8.00: cmd 61/08:80:fd:0d:95/00:00:05:00:00/40 tag 16 ncq 4096 out
                        res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048197] ata8.00: status: { DRDY }
[10239.048200] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048205] ata8.00: cmd 61/08:88:7d:d7:4b/00:00:09:00:00/40 tag 17 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048207] ata8.00: status: { DRDY }
[10239.048209] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048215] ata8.00: cmd 61/08:90:b5:5f:51/00:00:09:00:00/40 tag 18 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048217] ata8.00: status: { DRDY }
[10239.048219] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048225] ata8.00: cmd 61/20:98:1d:4b:61/00:00:09:00:00/40 tag 19 ncq 16384 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048227] ata8.00: status: { DRDY }
[10239.048229] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048234] ata8.00: cmd 61/80:a0:3d:4e:61/00:00:09:00:00/40 tag 20 ncq 65536 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048237] ata8.00: status: { DRDY }
[10239.048239] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048244] ata8.00: cmd 61/28:a8:bd:4e:61/00:00:09:00:00/40 tag 21 ncq 20480 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048247] ata8.00: status: { DRDY }
[10239.048249] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048254] ata8.00: cmd 61/08:b0:15:51:61/00:00:09:00:00/40 tag 22 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048257] ata8.00: status: { DRDY }
[10239.048259] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048272] ata8.00: cmd 61/08:b8:3d:0f:62/00:00:09:00:00/40 tag 23 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048275] ata8.00: status: { DRDY }
[10239.048277] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048282] ata8.00: cmd 61/08:c0:a5:0f:62/00:00:09:00:00/40 tag 24 ncq 4096 out
                        res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048284] ata8.00: status: { DRDY }
[10239.048286] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048291] ata8.00: cmd 61/08:c8:ed:2e:54/00:00:09:00:00/40 tag 25 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048293] ata8.00: status: { DRDY }
[10239.048295] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048300] ata8.00: cmd 61/08:d0:15:2f:54/00:00:09:00:00/40 tag 26 ncq 4096 out
                        res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048303] ata8.00: status: { DRDY }
[10239.048305] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048309] ata8.00: cmd 61/08:d8:ad:31:54/00:00:09:00:00/40 tag 27 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048312] ata8.00: status: { DRDY }
[10239.048314] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048319] ata8.00: cmd 61/08:e0:25:46:54/00:00:09:00:00/40 tag 28 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048321] ata8.00: status: { DRDY }
[10239.048323] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048328] ata8.00: cmd 61/08:e8:f5:48:54/00:00:09:00:00/40 tag 29 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048338] ata8.00: status: { DRDY }
[10239.048340] ata8.00: failed command: WRITE FPDMA QUEUED
[10239.048345] ata8.00: cmd 61/08:f0:15:49:54/00:00:09:00:00/40 tag 30 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10239.048347] ata8.00: status: { DRDY }
[10239.048351] ata8: hard resetting link
[10239.534381] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[10239.534537] ata8.00: supports DRM functions and may not be fully accessible
[10239.534757] ata8.00: supports DRM functions and may not be fully accessible
[10239.534811] ata8.00: configured for UDMA/133
[10239.534816] ata8.00: device reported invalid CHS sector 0
[10239.534819] ata8.00: device reported invalid CHS sector 0
[10239.534821] ata8.00: device reported invalid CHS sector 0
[10239.534823] ata8.00: device reported invalid CHS sector 0
[10239.534825] ata8.00: device reported invalid CHS sector 0
[10239.534827] ata8.00: device reported invalid CHS sector 0
[10239.534829] ata8.00: device reported invalid CHS sector 0
[10239.534831] ata8.00: device reported invalid CHS sector 0
[10239.534832] ata8.00: device reported invalid CHS sector 0
[10239.534834] ata8.00: device reported invalid CHS sector 0
[10239.534836] ata8.00: device reported invalid CHS sector 0
[10239.534841] ata8.00: device reported invalid CHS sector 0
[10239.534843] ata8.00: device reported invalid CHS sector 0
[10239.534846] ata8.00: device reported invalid CHS sector 0
[10239.534848] ata8.00: device reported invalid CHS sector 0
[10239.534850] ata8.00: device reported invalid CHS sector 0
[10239.534852] ata8.00: device reported invalid CHS sector 0
[10239.534855] ata8.00: device reported invalid CHS sector 0
[10239.534857] ata8.00: device reported invalid CHS sector 0
[10239.534859] ata8.00: device reported invalid CHS sector 0
[10239.534861] ata8.00: device reported invalid CHS sector 0
[10239.534863] ata8.00: device reported invalid CHS sector 0
[10239.534864] ata8.00: device reported invalid CHS sector 0
[10239.534868] ata8.00: device reported invalid CHS sector 0
[10239.534870] ata8.00: device reported invalid CHS sector 0
[10239.534872] ata8.00: device reported invalid CHS sector 0
[10239.534874] ata8.00: device reported invalid CHS sector 0
[10239.534876] ata8.00: device reported invalid CHS sector 0
[10239.534958] ata8: EH complete
[10270.018144] ata8.00: exception Emask 0x0 SAct 0x20000000 SErr 0x0 action 0x6 frozen
[10270.018152] ata8.00: failed command: WRITE FPDMA QUEUED
[10270.018158] ata8.00: cmd 61/08:e8:fd:0d:95/00:00:05:00:00/40 tag 29 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10270.018161] ata8.00: status: { DRDY }
[10270.018165] ata8: hard resetting link
[10270.504525] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[10270.504811] ata8.00: supports DRM functions and may not be fully accessible
[10270.505273] ata8.00: supports DRM functions and may not be fully accessible
[10270.505390] ata8.00: configured for UDMA/133
[10270.505398] ata8.00: device reported invalid CHS sector 0
[10270.505420] ata8: EH complete
[10370.977572] ata8.00: exception Emask 0x0 SAct 0x38240254 SErr 0x0 action 0x6 frozen
[10370.977578] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977584] ata8.00: cmd 61/08:10:75:07:51/00:00:09:00:00/40 tag 2 ncq 4096 out
                        res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977586] ata8.00: status: { DRDY }
[10370.977588] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977592] ata8.00: cmd 61/08:20:2d:37:a7/00:00:0e:00:00/40 tag 4 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977594] ata8.00: status: { DRDY }
[10370.977596] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977608] ata8.00: cmd 61/08:30:15:4b:61/00:00:09:00:00/40 tag 6 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977610] ata8.00: status: { DRDY }
[10370.977612] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977617] ata8.00: cmd 61/18:48:c5:07:51/00:00:09:00:00/40 tag 9 ncq 12288 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977619] ata8.00: status: { DRDY }
[10370.977621] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977626] ata8.00: cmd 61/08:90:c5:53:b3/00:00:0e:00:00/40 tag 18 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977628] ata8.00: status: { DRDY }
[10370.977630] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977634] ata8.00: cmd 61/18:a8:bd:08:51/00:00:09:00:00/40 tag 21 ncq 12288 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977636] ata8.00: status: { DRDY }
[10370.977638] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977643] ata8.00: cmd 61/08:d8:45:07:51/00:00:09:00:00/40 tag 27 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977645] ata8.00: status: { DRDY }
[10370.977647] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977651] ata8.00: cmd 61/08:e0:c5:75:97/00:00:05:00:00/40 tag 28 ncq 4096 out
                        res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977653] ata8.00: status: { DRDY }
[10370.977655] ata8.00: failed command: WRITE FPDMA QUEUED
[10370.977659] ata8.00: cmd 61/08:e8:e5:69:51/00:00:09:00:00/40 tag 29 ncq 4096 out
                        res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[10370.977661] ata8.00: status: { DRDY }
[10370.977666] ata8: hard resetting link
[10371.457293] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[10371.457495] ata8.00: supports DRM functions and may not be fully accessible
[10371.457724] ata8.00: supports DRM functions and may not be fully accessible
[10371.457782] ata8.00: configured for UDMA/133
[10371.457788] ata8.00: device reported invalid CHS sector 0
[10371.457791] ata8.00: device reported invalid CHS sector 0
[10371.457793] ata8.00: device reported invalid CHS sector 0
[10371.457796] ata8.00: device reported invalid CHS sector 0
[10371.457798] ata8.00: device reported invalid CHS sector 0
[10371.457800] ata8.00: device reported invalid CHS sector 0
[10371.457803] ata8.00: device reported invalid CHS sector 0
[10371.457805] ata8.00: device reported invalid CHS sector 0
[10371.457807] ata8.00: device reported invalid CHS sector 0
[10371.457847] ata8: EH complete
[10491.859741] ata8.00: NCQ disabled due to excessive errors
[10491.859749] ata8.00: exception Emask 0x0 SAct 0x4 SErr 0x0 action 0x6 frozen
[10491.859753] ata8.00: failed command: WRITE FPDMA QUEUED
[10491.859759] ata8.00: cmd 61/08:10:8d:41:91/00:00:0e:00:00/40 tag 2 ncq 4096 out
                        res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[10491.859778] ata8.00: status: { DRDY }
[10491.859783] ata8: hard resetting link
[10492.346107] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[10492.346267] ata8.00: supports DRM functions and may not be fully accessible
[10492.346521] ata8.00: supports DRM functions and may not be fully accessible
[10492.346575] ata8.00: configured for UDMA/133
[10492.346579] ata8.00: device reported invalid CHS sector 0
[10492.346592] ata8: EH complete
[21462.227608] perf interrupt took too long (2504 > 2495), lowering kernel.perf_event_max_sample_rate to 50100

dmesg3.log

[    0.595259] ata7: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff100 irq 29
[    0.595263] ata8: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff180 irq 29
[    0.771858] serio: i8042 KBD port at 0x60,0x64 irq 1
--
[    1.080512] scsi 0:0:0:0: Direct-Access     ATA      ST4000DM000-1F21 CC54 PQ: 0 ANSI: 5
[    1.081785] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.083715] ata8.00: supports DRM functions and may not be fully accessible
[    1.083790] ata8.00: ATA-9: Samsung SSD 840 EVO 250GB, EXT0DB6Q, max UDMA/133
[    1.083793] ata8.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[    1.083967] ata8.00: supports DRM functions and may not be fully accessible
[    1.084021] ata8.00: configured for UDMA/133
[    1.228644] usb 1-1.4: new high-speed USB device number 3 using ehci-pci
--
[    3.356821] sd 3:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    3.357203] sd 7:0:0:0: [sdf] 488397168 512-byte logical blocks: (250 GB/232 GiB)
[    3.357356] sd 7:0:0:0: [sdf] Write Protect is off
[    3.357361] sd 7:0:0:0: [sdf] Mode Sense: 00 3a 00 00
[    3.357379] sd 7:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    3.359591]  sdf: sdf1 sdf2 sdf3 sdf4
[    3.360246] sd 7:0:0:0: [sdf] Attached SCSI disk
[    3.369577] sd 2:0:0:0: [sdc] Attached SCSI disk
--
[   10.604630] Btrfs loaded
[   10.606840] BTRFS: device label evo devid 1 transid 28298 /dev/sdf4
[   10.606980] BTRFS: device label root devid 1 transid 1088237 /dev/sdf2
[   10.618391] BTRFS info (device sdf2): disk space caching is enabled
[   10.626056] BTRFS: detected SSD devices, enabling SSD mode
--
[   10.784763] systemd[1]: Mounted Temporary Directory.
[   10.785038] BTRFS info (device sdf2): enabling auto defrag
[   10.785041] BTRFS info (device sdf2): disk space caching is enabled
[   10.785802] systemd[1]: Mounted Debug File System.
--
[   10.987509] [drm] radeon kernel modesetting enabled.
[   10.989514] BTRFS info (device sdf4): enabling auto defrag
[   10.989517] BTRFS info (device sdf4): disk space caching is enabled
[   10.991312] sound hdaudioC0D2: autoconfig for ALC889: line_outs=4 (0x14/0x15/0x16/0x17/0x0) type:line
--
[   11.039527] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
[   11.061688] EXT4-fs (sdf1): mounted filesystem with ordered data mode. Opts: data=ordered
[   11.109785] e1000e 0000:03:00.0 eth1: registered PHC clock
--
[75032.458177] usb 1-1.5.1: USB disconnect, device number 12
[116557.898177] ata8.00: exception Emask 0x0 SAct 0x280000 SErr 0x0 action 0x6 frozen
[116557.898185] ata8.00: failed command: WRITE FPDMA QUEUED
[116557.898191] ata8.00: cmd 61/30:98:74:95:df/00:00:00:00:00/40 tag 19 ncq 24576 out
                         res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116557.898194] ata8.00: status: { DRDY }
[116557.898197] ata8.00: failed command: READ FPDMA QUEUED
[116557.898202] ata8.00: cmd 60/70:a8:14:7f:63/05:00:01:00:00/40 tag 21 ncq 712704 in
                         res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116557.898204] ata8.00: status: { DRDY }
[116557.898209] ata8: hard resetting link
[116558.384856] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[116558.386835] ata8.00: supports DRM functions and may not be fully accessible
[116558.387081] ata8.00: supports DRM functions and may not be fully accessible
[116558.387136] ata8.00: configured for UDMA/133
[116558.387141] ata8.00: device reported invalid CHS sector 0
[116558.387145] ata8.00: device reported invalid CHS sector 0
[116558.387165] ata8: EH complete
[116590.900395] ata8.00: exception Emask 0x0 SAct 0x70554043 SErr 0x0 action 0x6 frozen
[116590.900402] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900408] ata8.00: cmd 61/50:00:fc:dc:df/00:00:00:00:00/40 tag 0 ncq 40960 out
                         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900411] ata8.00: status: { DRDY }
[116590.900414] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900419] ata8.00: cmd 61/58:08:4c:dd:df/00:00:00:00:00/40 tag 1 ncq 45056 out
                         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900422] ata8.00: status: { DRDY }
[116590.900425] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900430] ata8.00: cmd 61/18:30:74:e2:df/00:00:00:00:00/40 tag 6 ncq 12288 out
                         res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900432] ata8.00: status: { DRDY }
[116590.900435] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900440] ata8.00: cmd 61/60:70:dc:e3:df/00:00:00:00:00/40 tag 14 ncq 49152 out
                         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900443] ata8.00: status: { DRDY }
[116590.900445] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900450] ata8.00: cmd 61/60:80:3c:e4:df/00:00:00:00:00/40 tag 16 ncq 49152 out
                         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900453] ata8.00: status: { DRDY }
[116590.900455] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900460] ata8.00: cmd 61/60:90:9c:e4:df/00:00:00:00:00/40 tag 18 ncq 49152 out
                         res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900463] ata8.00: status: { DRDY }
[116590.900465] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900470] ata8.00: cmd 61/60:a0:fc:e4:df/00:00:00:00:00/40 tag 20 ncq 49152 out
                         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900473] ata8.00: status: { DRDY }
[116590.900475] ata8.00: failed command: READ FPDMA QUEUED
[116590.900480] ata8.00: cmd 60/08:b0:b5:be:af/00:00:04:00:00/40 tag 22 ncq 4096 in
                         res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900483] ata8.00: status: { DRDY }
[116590.900485] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900491] ata8.00: cmd 61/40:e0:6c:dc:df/00:00:00:00:00/40 tag 28 ncq 32768 out
                         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900493] ata8.00: status: { DRDY }
[116590.900495] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900501] ata8.00: cmd 61/08:e8:c5:ff:8f/00:00:0e:00:00/40 tag 29 ncq 4096 out
                         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900503] ata8.00: status: { DRDY }
[116590.900506] ata8.00: failed command: WRITE FPDMA QUEUED
[116590.900511] ata8.00: cmd 61/50:f0:ac:dc:df/00:00:00:00:00/40 tag 30 ncq 40960 out
                         res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[116590.900513] ata8.00: status: { DRDY }
[116590.900518] ata8: hard resetting link
[116591.387034] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[116591.388930] ata8.00: supports DRM functions and may not be fully accessible
[116591.389162] ata8.00: supports DRM functions and may not be fully accessible
[116591.389216] ata8.00: configured for UDMA/133
[116591.389221] ata8.00: device reported invalid CHS sector 0
[116591.389224] ata8.00: device reported invalid CHS sector 0
[116591.389226] ata8.00: device reported invalid CHS sector 0
[116591.389229] ata8.00: device reported invalid CHS sector 0
[116591.389231] ata8.00: device reported invalid CHS sector 0
[116591.389234] ata8.00: device reported invalid CHS sector 0
[116591.389236] ata8.00: device reported invalid CHS sector 0
[116591.389239] ata8.00: device reported invalid CHS sector 0
[116591.389241] ata8.00: device reported invalid CHS sector 0
[116591.389243] ata8.00: device reported invalid CHS sector 0
[116591.389245] ata8.00: device reported invalid CHS sector 0
[116591.389286] ata8: EH complete
[116623.902571] ata8.00: exception Emask 0x0 SAct 0x424080 SErr 0x0 action 0x6 frozen
[116623.902578] ata8.00: failed command: WRITE FPDMA QUEUED
[116623.902584] ata8.00: cmd 61/08:38:bd:0a:51/00:00:09:00:00/40 tag 7 ncq 4096 out
                         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116623.902587] ata8.00: status: { DRDY }
[116623.902590] ata8.00: failed command: WRITE FPDMA QUEUED
[116623.902595] ata8.00: cmd 61/08:70:a4:d3:08/00:00:00:00:00/40 tag 14 ncq 4096 out
                         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[116623.902598] ata8.00: status: { DRDY }
[116623.902600] ata8.00: failed command: WRITE FPDMA QUEUED
[116623.902605] ata8.00: cmd 61/08:88:6d:5a:46/00:00:09:00:00/40 tag 17 ncq 4096 out
                         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[116623.902607] ata8.00: status: { DRDY }
[116623.902610] ata8.00: failed command: WRITE FPDMA QUEUED
[116623.902614] ata8.00: cmd 61/08:b0:b5:be:af/00:00:04:00:00/40 tag 22 ncq 4096 out
                         res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[116623.902617] ata8.00: status: { DRDY }
[116623.902621] ata8: hard resetting link
[116624.389224] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[116624.391180] ata8.00: supports DRM functions and may not be fully accessible
[116624.391551] ata8.00: supports DRM functions and may not be fully accessible
[116624.391611] ata8.00: configured for UDMA/133
[116624.391616] ata8.00: device reported invalid CHS sector 0
[116624.391619] ata8.00: device reported invalid CHS sector 0
[116624.391622] ata8.00: device reported invalid CHS sector 0
[116624.391624] ata8.00: device reported invalid CHS sector 0
[116624.391652] ata8: EH complete
[151072.942699] usb 1-1.5.1: new high-speed USB device number 13 using ehci-pci

dmesg4.log

[    0.570146] ata7: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff100 irq 29
[    0.570150] ata8: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff180 irq 29
[    0.760956] serio: i8042 KBD port at 0x60,0x64 irq 1
--
[    0.965108] hub 4-1:1.0: 8 ports detected
[    1.054197] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.054200] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
--
[    1.056043] ata1.00: configured for UDMA/133
[    1.056126] ata8.00: supports DRM functions and may not be fully accessible
[    1.056191] ata8.00: ATA-9: Samsung SSD 840 EVO 250GB, EXT0DB6Q, max UDMA/133
[    1.056194] ata8.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[    1.056245] scsi 0:0:0:0: Direct-Access     ATA      ST4000DM000-1F21 CC54 PQ: 0 ANSI: 5
[    1.056363] ata8.00: supports DRM functions and may not be fully accessible
[    1.056447] ata8.00: configured for UDMA/133
[    1.217755] usb 1-1.4: new high-speed USB device number 3 using ehci-pci

dmesg5.log

[    0.586874] ata7: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff100 irq 29
[    0.586877] ata8: SATA max UDMA/133 abar m512@0xfbeff000 port 0xfbeff180 irq 29
[    0.764233] serio: i8042 KBD port at 0x60,0x64 irq 1
--
[    1.070807] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.070811] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[    1.071670] ata1.00: ATA-9: ST4000DM000-1F2168, CC54, max UDMA/133
--
[    1.072617] ata1.00: configured for UDMA/133
[    1.072730] ata8.00: supports DRM functions and may not be fully accessible
[    1.072800] ata8.00: ATA-9: Samsung SSD 840 EVO 250GB, EXT0DB6Q, max UDMA/133
[    1.072803] ata8.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[    1.072859] scsi 0:0:0:0: Direct-Access     ATA      ST4000DM000-1F21 CC54 PQ: 0 ANSI: 5
[    1.072966] ata8.00: supports DRM functions and may not be fully accessible
[    1.073092] ata8.00: configured for UDMA/133
[    1.224295] usb 2-1.4: new high-speed USB device number 3 using ehci-pci
--
[104899.052054] cdc_acm 2-1.5.4:1.2: failed to set dtr/rts
[106595.055486] ata8.00: exception Emask 0x0 SAct 0x80 SErr 0x0 action 0x6 frozen
[106595.055491] ata8.00: failed command: WRITE FPDMA QUEUED
[106595.055496] ata8.00: cmd 61/08:38:1c:3e:57/00:00:00:00:00/40 tag 7 ncq 4096 out
                         res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[106595.055498] ata8.00: status: { DRDY }
[106595.055509] ata8: hard resetting link
[106595.542149] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[106595.542309] ata8.00: supports DRM functions and may not be fully accessible
[106595.542524] ata8.00: supports DRM functions and may not be fully accessible
[106595.542577] ata8.00: configured for UDMA/133
[106595.542583] ata8.00: device reported invalid CHS sector 0
[106595.542600] ata8: EH complete
[106626.974399] ata8.00: exception Emask 0x0 SAct 0x10000c00 SErr 0x0 action 0x6 frozen
[106626.974411] ata8.00: failed command: WRITE FPDMA QUEUED
[106626.974416] ata8.00: cmd 61/c0:50:84:8b:57/0b:00:00:00:00/40 tag 10 ncq 1540096 out
                         res 40/00:01:06:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[106626.974418] ata8.00: status: { DRDY }
[106626.974419] ata8.00: failed command: WRITE FPDMA QUEUED
[106626.974423] ata8.00: cmd 61/88:58:44:97:57/05:00:00:00:00/40 tag 11 ncq 724992 out
                         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[106626.974424] ata8.00: status: { DRDY }
[106626.974426] ata8.00: failed command: WRITE FPDMA QUEUED
[106626.974429] ata8.00: cmd 61/08:e0:9d:4f:90/00:00:0e:00:00/40 tag 28 ncq 4096 out
                         res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[106626.974431] ata8.00: status: { DRDY }
[106626.974434] ata8: hard resetting link
[106627.461083] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[106627.461309] ata8.00: supports DRM functions and may not be fully accessible
[106627.461581] ata8.00: supports DRM functions and may not be fully accessible
[106627.461638] ata8.00: configured for UDMA/133
[106627.461648] ata8.00: device reported invalid CHS sector 0
[106627.461651] ata8.00: device reported invalid CHS sector 0
[106627.461672] ata8: EH complete
[106658.040033] ata8.00: exception Emask 0x0 SAct 0x1000000 SErr 0x0 action 0x6 frozen
[106658.040041] ata8.00: failed command: READ FPDMA QUEUED
[106658.040048] ata8.00: cmd 60/30:c0:24:80:d1/00:00:00:00:00/40 tag 24 ncq 24576 in
                         res 40/00:00:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
[106658.040051] ata8.00: status: { DRDY }
[106658.040056] ata8: hard resetting link
[106658.526662] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[106658.526832] ata8.00: supports DRM functions and may not be fully accessible
[106658.527072] ata8.00: supports DRM functions and may not be fully accessible
[106658.527124] ata8.00: configured for UDMA/133
[106658.527130] ata8.00: device reported invalid CHS sector 0
[106658.527148] ata8: EH complete
[106689.078940] ata8.00: NCQ disabled due to excessive errors
[106689.078946] ata8.00: exception Emask 0x0 SAct 0x2000000 SErr 0x0 action 0x6 frozen
[106689.078951] ata8.00: failed command: WRITE FPDMA QUEUED
[106689.078956] ata8.00: cmd 61/08:c8:ec:4a:58/00:00:00:00:00/40 tag 25 ncq 4096 out
                         res 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[106689.078959] ata8.00: status: { DRDY }
[106689.078962] ata8: hard resetting link
[106689.565585] ata8: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[106689.565735] ata8.00: supports DRM functions and may not be fully accessible
[106689.565939] ata8.00: supports DRM functions and may not be fully accessible
[106689.565990] ata8.00: configured for UDMA/133
[106689.565995] ata8.00: device reported invalid CHS sector 0
[106689.566010] ata8: EH complete

i have the exacte same problem...
could you fix it yet?

@aHcVolle I haven't turned off discard support just yet. Was hoping the drive was doing some background task as part of the firmware migration and would resolve itself... but after a few days... still occurring.

It may be similar to the bug on my old OCZ Agility2 with discard/trim enabled as a mount option:
http://blog.kylemanna.com/linux/2013/05/05/ssd-trim/

I'll try dropping the discard flag on all my file systems.