NAS tests

gistfile1.txt

root@archiso ~ # pvcreate /dev/sd{a,b,c,d,e,f}
root@archiso ~ # vgcreate data /dev/sd{a,b,c,d,e,f}
root@archiso ~ # lvcreate -m1 -l 100%FREE --name root data

root@archiso ~ # hdparm -T /dev/mapper/data-root

/dev/mapper/data-root:
 Timing cached reads:   4558 MB in  2.00 seconds = 2280.47 MB/sec
root@archiso ~ # hdparm -t /dev/mapper/data-root 

/dev/mapper/data-root:
 Timing buffered disk reads: 250 MB in  3.02 seconds =  82.77 MB/sec


root@archiso ~ # sync;time bash -c "(dd if=/dev/zero of=/dev/mapper/data-root bs=8k count=500000; sync)" 
500000+0 records in
500000+0 records out
4096000000 bytes (4.1 GB) copied, 53.1433 s, 77.1 MB/s
bash: line 1:  1728 Segmentation fault      sync
bash -c "(dd if=/dev/zero of=/dev/mapper/data-root bs=8k count=500000; sync)"  0.08s user 6.38s system 12% cpu 53.154 total

RAID1+0

root@archiso ~ # lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda               8:0    0 698.7G  0 disk  
└─md127           9:127  0 698.5G  0 raid1 
  └─md124         9:124  0   1.8T  0 raid0 
sdb               8:16   0 698.7G  0 disk  
└─md127           9:127  0 698.5G  0 raid1 
  └─md124         9:124  0   1.8T  0 raid0 
sdc               8:32   0 931.5G  0 disk  
└─md126           9:126  0 931.4G  0 raid1 
  └─md124         9:124  0   1.8T  0 raid0 
sdd               8:48   0 931.5G  0 disk  
└─md126           9:126  0 931.4G  0 raid1 
  └─md124         9:124  0   1.8T  0 raid0 
sde               8:64   0 232.9G  0 disk  
└─md125           9:125  0 232.8G  0 raid1 
  └─md124         9:124  0   1.8T  0 raid0 
sdf               8:80   0 232.9G  0 disk  
└─md125           9:125  0 232.8G  0 raid1 
  └─md124         9:124  0   1.8T  0 raid0 
root@archiso ~ # hdparm -t /dev/md/md3

/dev/md/md3:
 Timing buffered disk reads: 684 MB in  3.00 seconds = 227.88 MB/sec
root@archiso ~ # hdparm -T /dev/md/md3 

/dev/md/md3:
 Timing cached reads:   4736 MB in  2.00 seconds = 2369.25 MB/sec

root@archiso ~ # dd if=/dev/zero of=/dev/md/md3 bs=4k count=1000000 
1000000+0 records in
1000000+0 records out
4096000000 bytes (4.1 GB) copied, 39.5578 s, 104 MB/s