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jcnars/extending u01

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extending u01
[root@linuxserver44 oracle_install]# lsof|grep u01
[root@linuxserver44 oracle_install]# findmnt
TARGET SOURCE FSTYPE OPTIONS
/ /dev/mapper/rootvg-rootlv
xfs rw,relatime,attr2,inode64,noquota
├─/sys sysfs sysfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/kernel/security securityfs securityfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/fs/cgroup tmpfs tmpfs ro,nosuid,nodev,noexec,mode=755
│ │ ├─/sys/fs/cgroup/systemd cgroup cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd
│ │ ├─/sys/fs/cgroup/pids cgroup cgroup rw,nosuid,nodev,noexec,relatime,pids
│ │ ├─/sys/fs/cgroup/perf_event cgroup cgroup rw,nosuid,nodev,noexec,relatime,perf_event
│ │ ├─/sys/fs/cgroup/cpuset cgroup cgroup rw,nosuid,nodev,noexec,relatime,cpuset
│ │ ├─/sys/fs/cgroup/memory cgroup cgroup rw,nosuid,nodev,noexec,relatime,memory
│ │ ├─/sys/fs/cgroup/net_cls,net_prio cgroup cgroup rw,nosuid,nodev,noexec,relatime,net_prio,net_cls
│ │ ├─/sys/fs/cgroup/hugetlb cgroup cgroup rw,nosuid,nodev,noexec,relatime,hugetlb
│ │ ├─/sys/fs/cgroup/blkio cgroup cgroup rw,nosuid,nodev,noexec,relatime,blkio
│ │ ├─/sys/fs/cgroup/cpu,cpuacct cgroup cgroup rw,nosuid,nodev,noexec,relatime,cpuacct,cpu
│ │ ├─/sys/fs/cgroup/devices cgroup cgroup rw,nosuid,nodev,noexec,relatime,devices
│ │ └─/sys/fs/cgroup/freezer cgroup cgroup rw,nosuid,nodev,noexec,relatime,freezer
│ ├─/sys/fs/pstore pstore pstore rw,nosuid,nodev,noexec,relatime
│ ├─/sys/firmware/efi/efivars efivarfs efivarfs rw,nosuid,nodev,noexec,relatime
│ ├─/sys/kernel/config configfs configfs rw,relatime
│ └─/sys/kernel/debug debugfs debugfs rw,relatime
├─/proc proc proc rw,nosuid,nodev,noexec,relatime
│ └─/proc/sys/fs/binfmt_misc systemd-1 autofs rw,relatime,fd=26,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=32648
│ └─/proc/sys/fs/binfmt_misc binfmt_misc binfmt_misc rw,relatime
├─/dev devtmpfs devtmpfs rw,nosuid,size=395516504k,nr_inodes=98879126,mode=755
│ ├─/dev/shm tmpfs tmpfs rw,nosuid,nodev
│ ├─/dev/pts devpts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000
│ ├─/dev/hugepages hugetlbfs hugetlbfs rw,relatime
│ └─/dev/mqueue mqueue mqueue rw,relatime
├─/run tmpfs tmpfs rw,nosuid,nodev,mode=755
│ ├─/run/user/1532 tmpfs tmpfs rw,nosuid,nodev,relatime,size=79105900k,mode=700,uid=1532,gid=1532
│ └─/run/user/1001 tmpfs tmpfs rw,nosuid,nodev,relatime,size=79105900k,mode=700,uid=1001,gid=1001
├─/boot /dev/mapper/3600a098038314344382b4f7539397555p2
xfs rw,relatime,attr2,inode64,noquota
│ └─/boot/efi /dev/mapper/3600a098038314344382b4f7539397555p1
vfat rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=winnt,errors=remount-ro
├─/tmp /dev/mapper/rootvg-tmplv
xfs rw,relatime,attr2,inode64,noquota
├─/home /dev/mapper/rootvg-homelv
xfs rw,relatime,attr2,inode64,noquota
├─/var /dev/mapper/rootvg-varlv
xfs rw,relatime,attr2,inode64,noquota
│ └─/var/lib/nfs/rpc_pipefs sunrpc rpc_pipefs rw,relatime
└─/opt /dev/mapper/rootvg-optlv
xfs rw,relatime,attr2,inode64,noquota
[root@linuxserver44 oracle_install]# findmnt|grep u01
[root@linuxserver44 oracle_install]# ll /dev/mapper/*up1*
ls: cannot access /dev/mapper/*up1*: No such file or directory
[root@linuxserver44 oracle_install]# ll /dev/mapper/*uo1*
ls: cannot access /dev/mapper/*uo1*: No such file or directory
[root@linuxserver44 oracle_install]# ll /dev/mapper/*u01*
lrwxrwxrwx 1 root root 8 Nov 23 19:47 /dev/mapper/sw-u01 -> ../dm-70
-rw-r--r-- 1 root root 104857600 Feb 3 2021 /dev/mapper/sw-u011
[root@linuxserver44 oracle_install]# lsof|grep dm-70
dio/dm-70 27410 root cwd DIR 253,64 4096 96 /
dio/dm-70 27410 root rtd DIR 253,64 4096 96 /
dio/dm-70 27410 root txt unknown /proc/27410/exe
[root@linuxserver44 oracle_install]# lsof|grep dm-70
dio/dm-70 27410 root cwd DIR 253,64 4096 96 /
dio/dm-70 27410 root rtd DIR 253,64 4096 96 /
dio/dm-70 27410 root txt unknown /proc/27410/exe
[root@linuxserver44 oracle_install]# ps -ef|grep 27410
root 16118 6675 0 22:01 pts/0 00:00:00 grep --color=auto 27410
root 27410 2 0 Nov17 ? 00:00:00 [dio/dm-70]
[root@linuxserver44 oracle_install]# pstree -p 27410
dio/dm-70(27410)
[root@linuxserver44 oracle_install]# which dio
/usr/bin/which: no dio in (/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/root/bin)
[root@linuxserver44 oracle_install]# ps -ef|grep dio
root 16582 6675 0 22:02 pts/0 00:00:00 grep --color=auto dio
root 27410 2 0 Nov17 ? 00:00:00 [dio/dm-70]
[root@linuxserver44 oracle_install]# kill -9 27410
[root@linuxserver44 oracle_install]# ll /dev/mapper/*u01*
lrwxrwxrwx 1 root root 8 Nov 23 19:47 /dev/mapper/sw-u01 -> ../dm-70
-rw-r--r-- 1 root root 104857600 Feb 3 2021 /dev/mapper/sw-u011
[root@linuxserver44 oracle_install]# lsof|grep dm-70
dio/dm-70 27410 root cwd DIR 253,64 4096 96 /
dio/dm-70 27410 root rtd DIR 253,64 4096 96 /
dio/dm-70 27410 root txt unknown /proc/27410/exe
[root@linuxserver44 oracle_install]# ps -ef|grep dio
root 18515 6675 0 22:04 pts/0 00:00:00 grep --color=auto dio
root 27410 2 0 Nov17 ? 00:00:00 [dio/dm-70]
[root@linuxserver44 oracle_install]# cd /proc/27410/exe
-bash: cd: /proc/27410/exe: No such file or directory
[root@linuxserver44 oracle_install]# cd /proc/27410/
[root@linuxserver44 27410]# ls
ls: cannot open directory .: No such process
[root@linuxserver44 27410]# cd -
-bash: cd: /u01/oracle_install: No such file or directory
[root@linuxserver44 27410]# cd /
[root@linuxserver44 /]# cd -
-bash: cd: /proc/27410: No such file or directory
[root@linuxserver44 /]# ps -ef|grep dio
root 19305 6675 0 22:05 pts/0 00:00:00 grep --color=auto dio
[root@linuxserver44 /]# ll /dev/mapper/*u01*
lrwxrwxrwx 1 root root 8 Nov 23 19:47 /dev/mapper/sw-u01 -> ../dm-70
-rw-r--r-- 1 root root 104857600 Feb 3 2021 /dev/mapper/sw-u011
[root@linuxserver44 /]# lvremove -vf /dev/mapper/sw-u01
Removing sw-u01 (253:70)
Archiving volume group "sw" metadata (seqno 6).
Releasing logical volume "u01"
Creating volume group backup "/etc/lvm/backup/sw" (seqno 7).
Logical volume "u01" successfully removed
[root@linuxserver44 /]# #lvcreate -l 100 -n u01 sw
[root@linuxserver44 /]# lvcreate -l 100 -n u01 sw
WARNING: xfs signature detected on /dev/sw/u01 at offset 0. Wipe it? [y/n]: y
Wiping xfs signature on /dev/sw/u01.
Logical volume "u01" created.
[root@linuxserver44 /]# !mkfs.xfs
-bash: !mkfs.xfs: event not found
[root@linuxserver44 /]# /sbin/mkfs.xfs -f /dev/mapper/sw-u01
meta-data=/dev/mapper/sw-u01 isize=512 agcount=4, agsize=25600 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=102400, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=1605, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@linuxserver44 /]# /sbin/mkfs.xfs -f /dev/mapper/sw-u01
meta-data=/dev/mapper/sw-u01 isize=512 agcount=4, agsize=25600 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=102400, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=1605, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@linuxserver44 /]# #atleast the busy error is gone
[root@linuxserver44 /]#
[root@linuxserver44 /]#
[root@linuxserver44 /]#
[root@linuxserver44 /]#
[root@linuxserver44 /]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
sw db -wi-a----- <160.01g
homelv rootvg -wi-ao---- 20.00g
optlv rootvg -wi-ao---- 20.00g
rootlv rootvg -wi-ao---- 8.00g
swaplv rootvg -wi-ao---- 16.00g
tmplv rootvg -wi-ao---- 5.00g
varlv rootvg -wi-ao---- 4.00g
u01 sw -wi-a----- 400.00m
[root@linuxserver44 /]# vgs
VG #PV #LV #SN Attr VSize VFree
db 1 1 0 wz--n- <160.01g 0
rootvg 1 6 0 wz--n- 198.78g 125.78g
sw 2 1 0 wz--n- <160.01g <159.62g
[root@linuxserver44 /]# lvremove df -h /u0*
lvremove - Remove logical volume(s) from the system
lvremove VG|LV|Tag|Select ...
[ -A|--autobackup y|n ]
[ -f|--force ]
[ -S|--select String ]
[ --nohistory ]
[ --noudevsync ]
[ --reportformat basic|json ]
[ COMMON_OPTIONS ]
Common options for lvm:
[ -d|--debug ]
[ -h|--help ]
[ -q|--quiet ]
[ -v|--verbose ]
[ -y|--yes ]
[ -t|--test ]
[ --commandprofile String ]
[ --config String ]
[ --driverloaded y|n ]
[ --lockopt String ]
[ --longhelp ]
[ --profile String ]
[ --version ]
Use --longhelp to show all options and advanced commands.
[root@linuxserver44 /]# f -h /u0*
-bash: f: command not found
[root@linuxserver44 /]# df -h /u0*
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvg-rootlv 8.0G 2.9G 5.2G 36% /
[root@linuxserver44 /]# df -h /u01
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvg-rootlv 8.0G 2.9G 5.2G 36% /
[root@linuxserver44 /]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
sw db -wi-a----- <160.01g
homelv rootvg -wi-ao---- 20.00g
optlv rootvg -wi-ao---- 20.00g
rootlv rootvg -wi-ao---- 8.00g
swaplv rootvg -wi-ao---- 16.00g
tmplv rootvg -wi-ao---- 5.00g
varlv rootvg -wi-ao---- 4.00g
u01 sw -wi-a----- 400.00m
[root@linuxserver44 /]# lvremove u01
Volume group "u01" not found
Cannot process volume group u01
[root@linuxserver44 /]# mount /u01
[root@linuxserver44 /]# df -h /u0*
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/sw-u01 394M 21M 374M 6% /u01
[root@linuxserver44 /]# umount /u01
[root@linuxserver44 /]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
sw db -wi-a----- <160.01g
homelv rootvg -wi-ao---- 20.00g
optlv rootvg -wi-ao---- 20.00g
rootlv rootvg -wi-ao---- 8.00g
swaplv rootvg -wi-ao---- 16.00g
tmplv rootvg -wi-ao---- 5.00g
varlv rootvg -wi-ao---- 4.00g
u01 sw -wi-a----- 400.00m
[root@linuxserver44 /]# ll /dev/mapper/*u01*
lrwxrwxrwx 1 root root 8 Nov 23 22:26 /dev/mapper/sw-u01 -> ../dm-70
-rw-r--r-- 1 root root 104857600 Feb 3 2021 /dev/mapper/sw-u011
[root@linuxserver44 /]# lsof|grep dm-70
[root@linuxserver44 /]# lsof|grep dm-70
[root@linuxserver44 /]# !dmsetup
dmsetup info -c | grep u01
sw-u01 253 70 L--w 0 1 0 LVM-7fcfY2lqgVZnRrtcqa322ywUYHN2LnPJ0Zz7GhRHbu18axwqZDkpxkn3cG8xI2F1
[root@linuxserver44 /]# lsof | grep "253,70"
[root@linuxserver44 /]# lvscan
ACTIVE '/dev/sw/u01' [400.00 MiB] inherit
ACTIVE '/dev/db/sw' [<160.01 GiB] inherit
ACTIVE '/dev/rootvg/swaplv' [16.00 GiB] inherit
ACTIVE '/dev/rootvg/optlv' [20.00 GiB] inherit
ACTIVE '/dev/rootvg/varlv' [4.00 GiB] inherit
ACTIVE '/dev/rootvg/homelv' [20.00 GiB] inherit
ACTIVE '/dev/rootvg/tmplv' [5.00 GiB] inherit
ACTIVE '/dev/rootvg/rootlv' [8.00 GiB] inherit
[root@linuxserver44 /]# lsof /dev/sw/u01
[root@linuxserver44 /]# lvremove /dev/sw/u01
Do you really want to remove active logical volume sw/u01? [y/n]: y
Logical volume "u01" successfully removed
[root@linuxserver44 /]# vgscan
Reading volume groups from cache.
Found volume group "sw" using metadata type lvm2
Found volume group "db" using metadata type lvm2
Found volume group "rootvg" using metadata type lvm2
[root@linuxserver44 /]# vgdisplay
--- Volume group ---
VG Name sw
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 9
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 2
Act PV 2
VG Size <160.01 GiB
PE Size 4.00 MiB
Total PE 40962
Alloc PE / Size 0 / 0
Free PE / Size 40962 / <160.01 GiB
VG UUID 7fcfY2-lqgV-ZnRr-tcqa-322y-wUYH-N2LnPJ
--- Volume group ---
VG Name db
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size <160.01 GiB
PE Size 4.00 MiB
Total PE 40962
Alloc PE / Size 40962 / <160.01 GiB
Free PE / Size 0 / 0
VG UUID E9irgr-adpP-b2jf-5bB3-adY4-awYl-Ev1UXi
--- Volume group ---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 10
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 6
Open LV 6
Max PV 0
Cur PV 1
Act PV 1
VG Size 198.78 GiB
PE Size 32.00 MiB
Total PE 6361
Alloc PE / Size 2336 / 73.00 GiB
Free PE / Size 4025 / 125.78 GiB
VG UUID UKI1Xi-9cBf-v5Uh-cSCT-TYC4-x9HZ-J0v8CO
[root@linuxserver44 /]# lvcreate -L 60G -n u01 sw
WARNING: xfs signature detected on /dev/sw/u01 at offset 0. Wipe it? [y/n]: y
Wiping xfs signature on /dev/sw/u01.
Logical volume "u01" created.
[root@linuxserver44 /]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
sw db -wi-a----- <160.01g
homelv rootvg -wi-ao---- 20.00g
optlv rootvg -wi-ao---- 20.00g
rootlv rootvg -wi-ao---- 8.00g
swaplv rootvg -wi-ao---- 16.00g
tmplv rootvg -wi-ao---- 5.00g
varlv rootvg -wi-ao---- 4.00g
u01 sw -wi-ao---- 60.00g
[root@linuxserver44 /]# lvcreate -L 20G -n u02 sw
Logical volume "u02" created.
[root@linuxserver44 /]#
[root@linuxserver44 /]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 378G 200M 377G 1% /dev
tmpfs 378G 16K 378G 1% /dev/shm
tmpfs 378G 899M 377G 1% /run
tmpfs 378G 0 378G 0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv 8.0G 2.9G 5.2G 36% /
/dev/mapper/3600a098038314344382b4f7539397555p2 1014M 192M 823M 19% /boot
/dev/mapper/3600a098038314344382b4f7539397555p1 204M 9.7M 195M 5% /boot/efi
/dev/mapper/rootvg-tmplv 5.0G 34M 5.0G 1% /tmp
/dev/mapper/rootvg-homelv 20G 6.3G 14G 32% /home
/dev/mapper/rootvg-optlv 20G 2.4G 18G 12% /opt
/dev/mapper/rootvg-varlv 4.0G 1.7G 2.4G 42% /var
tmpfs 76G 0 76G 0% /run/user/1001
tmpfs 76G 0 76G 0% /run/user/1532
/dev/mapper/sw-u01 394M 394M 60K 100% /u01
/dev/mapper/sw-u02 20G 33M 20G 1% /u02
[root@linuxserver44 /]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
homelv rootvg -wi-ao---- 20.00g
optlv rootvg -wi-ao---- 20.00g
rootlv rootvg -wi-ao---- 8.00g
swaplv rootvg -wi-ao---- 16.00g
tmplv rootvg -wi-ao---- 5.00g
varlv rootvg -wi-ao---- 4.00g
u01 sw -wi-ao---- 60.00g
u02 sw -wi-ao---- 20.00g
[root@linuxserver44 /]#
[root@linuxserver44 /]#
[root@linuxserver44 /]# ### 11/24/2021: Wed
[root@linuxserver44 /]# # /u01 full caused our end-to-end prowjob fail
[root@linuxserver44 /]# mkfs.xfs -f /dev/mapper/sw-u01
mkfs.xfs: /dev/mapper/sw-u01 contains a mounted filesystem
Usage: mkfs.xfs
/* blocksize */ [-b log=n|size=num]
/* metadata */ [-m crc=0|1,finobt=0|1,uuid=xxx]
/* data subvol */ [-d agcount=n,agsize=n,file,name=xxx,size=num,
(sunit=value,swidth=value|su=num,sw=num|noalign),
sectlog=n|sectsize=num
/* force overwrite */ [-f]
/* inode size */ [-i log=n|perblock=n|size=num,maxpct=n,attr=0|1|2,
projid32bit=0|1]
/* no discard */ [-K]
/* log subvol */ [-l agnum=n,internal,size=num,logdev=xxx,version=n
sunit=value|su=num,sectlog=n|sectsize=num,
lazy-count=0|1]
/* label */ [-L label (maximum 12 characters)]
/* naming */ [-n log=n|size=num,version=2|ci,ftype=0|1]
/* no-op info only */ [-N]
/* prototype file */ [-p fname]
/* quiet */ [-q]
/* realtime subvol */ [-r extsize=num,size=num,rtdev=xxx]
/* sectorsize */ [-s log=n|size=num]
/* version */ [-V]
devicename
<devicename> is required unless -d name=xxx is given.
<num> is xxx (bytes), xxxs (sectors), xxxb (fs blocks), xxxk (xxx KiB),
xxxm (xxx MiB), xxxg (xxx GiB), xxxt (xxx TiB) or xxxp (xxx PiB).
<value> is xxx (512 byte blocks).
[root@linuxserver44 /]# mkfs.xfs -f /dev/mapper/sw-u01 -f
mkfs.xfs: /dev/mapper/sw-u01 contains a mounted filesystem
Usage: mkfs.xfs
/* blocksize */ [-b log=n|size=num]
/* metadata */ [-m crc=0|1,finobt=0|1,uuid=xxx]
/* data subvol */ [-d agcount=n,agsize=n,file,name=xxx,size=num,
(sunit=value,swidth=value|su=num,sw=num|noalign),
sectlog=n|sectsize=num
/* force overwrite */ [-f]
/* inode size */ [-i log=n|perblock=n|size=num,maxpct=n,attr=0|1|2,
projid32bit=0|1]
/* no discard */ [-K]
/* log subvol */ [-l agnum=n,internal,size=num,logdev=xxx,version=n
sunit=value|su=num,sectlog=n|sectsize=num,
lazy-count=0|1]
/* label */ [-L label (maximum 12 characters)]
/* naming */ [-n log=n|size=num,version=2|ci,ftype=0|1]
/* no-op info only */ [-N]
/* prototype file */ [-p fname]
/* quiet */ [-q]
/* realtime subvol */ [-r extsize=num,size=num,rtdev=xxx]
/* sectorsize */ [-s log=n|size=num]
/* version */ [-V]
devicename
<devicename> is required unless -d name=xxx is given.
<num> is xxx (bytes), xxxs (sectors), xxxb (fs blocks), xxxk (xxx KiB),
xxxm (xxx MiB), xxxg (xxx GiB), xxxt (xxx TiB) or xxxp (xxx PiB).
<value> is xxx (512 byte blocks).
[root@linuxserver44 /]# mkfs.xfs /dev/mapper/sw-u01
mkfs.xfs: /dev/mapper/sw-u01 contains a mounted filesystem
Usage: mkfs.xfs
/* blocksize */ [-b log=n|size=num]
/* metadata */ [-m crc=0|1,finobt=0|1,uuid=xxx]
/* data subvol */ [-d agcount=n,agsize=n,file,name=xxx,size=num,
(sunit=value,swidth=value|su=num,sw=num|noalign),
sectlog=n|sectsize=num
/* force overwrite */ [-f]
/* inode size */ [-i log=n|perblock=n|size=num,maxpct=n,attr=0|1|2,
projid32bit=0|1]
/* no discard */ [-K]
/* log subvol */ [-l agnum=n,internal,size=num,logdev=xxx,version=n
sunit=value|su=num,sectlog=n|sectsize=num,
lazy-count=0|1]
/* label */ [-L label (maximum 12 characters)]
/* naming */ [-n log=n|size=num,version=2|ci,ftype=0|1]
/* no-op info only */ [-N]
/* prototype file */ [-p fname]
/* quiet */ [-q]
/* realtime subvol */ [-r extsize=num,size=num,rtdev=xxx]
/* sectorsize */ [-s log=n|size=num]
/* version */ [-V]
devicename
<devicename> is required unless -d name=xxx is given.
<num> is xxx (bytes), xxxs (sectors), xxxb (fs blocks), xxxk (xxx KiB),
xxxm (xxx MiB), xxxg (xxx GiB), xxxt (xxx TiB) or xxxp (xxx PiB).
<value> is xxx (512 byte blocks).
[root@linuxserver44 /]# wipefs -a /dev/mapper/sw-u01ze= /dev/mapper/sw-u01
wipefs: error: /dev/mapper/sw-u01ze=: probing initialization failed: No such file or directory
[root@linuxserver44 /]# wipefs -a /dev/mapper/sw-u01
wipefs: error: /dev/mapper/sw-u01: probing initialization failed: Device or resource busy
[root@linuxserver44 /]# umount /u01
[root@linuxserver44 /]# wipefs -a /dev/mapper/sw-u01
/dev/mapper/sw-u01: 4 bytes were erased at offset 0x00000000 (xfs): 58 46 53 42
[root@linuxserver44 /]# mount /u01
mount: wrong fs type, bad option, bad superblock on /dev/mapper/sw-u01,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[root@linuxserver44 /]# mkfs.xfs /dev/mapper/sw-u01
meta-data=/dev/mapper/sw-u01 isize=512 agcount=4, agsize=3932160 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=15728640, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=7680, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@linuxserver44 /]# mount /u01
[root@linuxserver44 /]# mount /u01
mount: /dev/mapper/sw-u01 is already mounted or /u01 busy
/dev/mapper/sw-u01 is already mounted on /u01
[root@linuxserver44 /]# df -h /u0*
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/sw-u01 60G 33M 60G 1% /u01
/dev/mapper/sw-u02 20G 33M 20G 1% /u02
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