extras/volume_id/README

   1 vol_id - probe filesystem and read label and uuid
   2
   3 vol_id will only return with a non-zero exit code if the string asked for,
   4 is not empty. All trailing whitespace will be removed, spaces replaced by
   5 underscore and slashes ignored.
   6 Unmangled values are available in the --export mode as hex-encoded strings
   7 in *_ENC= keys.
   8
   9   $ extras/volume_id/vol_id --export /dev/sda6
  10   ID_FS_USAGE=filesystem
  11   ID_FS_TYPE=ext3
  12   ID_FS_VERSION=1.0
  13   ID_FS_UUID=3e999973-00c9-4917-9442-b7633bd95b9e
  14   ID_FS_UUID_ENC=3e999973-00c9-4917-9442-b7633bd95b9e
  15   ID_FS_LABEL=devel
  16   ID_FS_LABEL_ENC=devel
  17
  18   $ extras/volume_id/vol_id --label /dev/sda6
  19   devel
  20
  21   $ extras/volume_id/vol_id --type /dev/sda6
  22   ext3
  23
  24
  25 fstype                 probe  label  uuid  version
  26 --------------------------------------------------
  27 linux swap             *      *      *     *
  28 btrfs                  *      *      *     -
  29 ext                    *      *      *     *
  30 reiserfs jr/3.5/3.6/4  *      *      *     *
  31 fat (12, 16, 32)       *      *      *     *
  32 ntfs                   *      *      *     *
  33 jfs                    *      *      *     -
  34 xfs                    *      *      *     -
  35 hfs (plus, wrapped)    *      *      *     -
  36 udf                    *      *      -     -
  37 iso9660                *      *      -     -
  38 ufs                    *      -      -     -
  39 cramfs                 *      *      -     -
  40 sysv                   *      *      -     *
  41 luks                   *      -      *     -
  42 hpfs                   *      *      -     -
  43 romfs                  *      *      -     -
  44 squashfs               *      -      -     -
  45 minix                  *      -      -     *
  46 ocfs (1, 2)            *      *      *     *
  47 vxfs                   *      -      -     *
  48 nss (netware)          *      -      *     *
  49 gfs, gfs2              *      *      *     -
  50 oracleasm              *      *      -     -
  51
  52 Raid members are detected to prevent the probing for a filesystem
  53 -----------------------------------------------------------------
  54 linux raid (md)        *      *      *     *
  55 LVM 1                  *      -      -     -
  56 LVM 2                  *      -      -     *
  57 ddf                    *      -      *     *
  58 highpoint              *      -      -     -
  59 isw_raid               *      -      -     -
  60 lsi_raid               *      -      -     -
  61 nvidia_raid            *      -      -     -
  62 promise_raid           *      -      -     -
  63 silicon_raid           *      -      -     -
  64 via_raid               *      -      -     -
  65 jmicron                *      -      -     -
  66 adaptec                *      -      -     -