Universally unique identifier (UUID)
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Universally unique identifier (UUID)
- Filesystem UUID
- Block device UUID:
lsblk -io KNAME,TYPE,SIZE,MODEL,UUID
- LVM PV UUID:
pvdisplay
Contents
EXT4 filesystem
mkfs.ext4 /dev/vg01/lv01 mke2fs 1.44.1 (24-Mar-2018) Creating filesystem with 2441850880 4k blocks and 305233920 inodes Filesystem UUID: e6742357-a181-4b82-837f-9a01f3e52568 Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544, 1934917632 Allocating group tables: done Writing inode tables: done Creating journal (262144 blocks): done Writing superblocks and filesystem accounting information: done
LVM
--- Physical volume --- PV Name /dev/sdc3 VG Name rhvh PV Size <7.28 TiB / not usable 3.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 1907390 Free PE 25600 Allocated PE 1881790 PV UUID Tk3lEU-NzHl-miXe-bKNk-wcNN-vvou-nM0IGD
pvcreate --uuid "FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk" --restorefile /etc/lvm/archive/VG_00050.vg /dev/sdh1 Physical volume "/dev/sdh1" successfully created
pvchange --uuid
Generate new random UUID for specified PVs.
Related terms
See also
- File systems:
mount
,umount
,findmnt
,find
,swapon
,swapoff
,UUID, blkid
, mount options:/etc/fstab
,udisksctl mount
,guestmount
,/proc/mounts
,fstrim
,systemd-mount
,defaults
- File systems: clustered file system,
tune2fs
mkfs.ext4
,superblock, e2fsck,resize2fs
,mount
,df
,umount
, UUID,fstab
- File systems:
ext4
,XFS
,ZFS
,btrfs
,wipefs
,findfs
,HDFS
,overlay
,aufs
,virt-filesystems
, Windows: (FAT, NTFS, ReFS), GPFS, squashfs, Ecryptfs, Encfs, FUSE, VMFS, Comparison of distributed file systems, Userspace filesystem, Resize filesystem size - PV:
pvcreate
,pvchange
libuuid
provided byutil-linux
packagemultipath
,multipathd
,mpathpersist
,WWIDS
,/etc/multipath.conf
- PTUUID and PARTUUID
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