Ubuntu Wiki

1. Knowing UUID and other IDs of disk partitions

1.1. blkid

• this will list UUID for all known partitions (why "blk"?)

  <user>@<host>:~$ blkid
  /dev/sda1: LABEL="sda1-boot-2GB" UUID="a596c61a-16b7-4967-890a-38022722b04d" SEC_TYPE="ext2" TYPE="ext3"
  /dev/sda2: ...

1.2. vol_id

must be run with administrative privileges (root or sudo)

• short ID list for one device

  <user>@<host>:~# vol_id /dev/sda1
  ID_FS_USAGE=filesystem
  ID_FS_TYPE=ext3
  ID_FS_VERSION=1.0
  ID_FS_UUID=a596c61a-16b7-4967-890a-38022722b04d
  ID_FS_UUID_ENC=a596c61a-16b7-4967-890a-38022722b04d
  ID_FS_LABEL=sda1-boot-2GB
  ID_FS_LABEL_ENC=sda1-boot-2GB
  ID_FS_LABEL_SAFE=sda1-boot-2GB

• this is just the UUID for one device

  <user>@<host>:~# vol_id -u /dev/sda1
  a596c61a-16b7-4967-890a-38022722b04d

1.3. udevinfo

command not found

• full ID list for one device

  <user>@<host>:~# udevinfo -q env -n /dev/sda1
  ID_VENDOR=ATA
  ID_MODEL=Hitachi_HDT72503
  ID_REVISION=V54O
  ID_SERIAL=1ATA_Hitachi_HDT725032VLA360_xxx
  ID_SERIAL_SHORT=ATA_Hitachi_HDT725032VLA360_xxx
  ID_TYPE=disk
  ID_BUS=scsi
  ID_ATA_COMPAT=Hitachi_HDT725032VLA360_xxx
  ID_PATH=pci-0000:00:05.0-scsi-0:0:0:0
  ID_FS_USAGE=filesystem
  ID_FS_TYPE=ext3
  ID_FS_VERSION=1.0
  ID_FS_UUID=a596c61a-16b7-4967-890a-38022722b04d
  ID_FS_UUID_ENC=a596c61a-16b7-4967-890a-38022722b04d
  ID_FS_LABEL=sda1-boot-2GB
  ID_FS_LABEL_ENC=sda1-boot-2GB
  ID_FS_LABEL_SAFE=sda1-boot-2GB