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Text File  |  2007-03-28  |  2.9 KB  |  78 lines
  1. vol_id - probe filesystem and read label and uuid
  2.  
  3. This program is normally called from a udev rule, to provide udev with the
  4. filesystem type of a volume and the label and uuid to name a device node.
  5. vol_id opens the blockdevice node specified at the commandline. The following
  6. commandline switches are supported to specify what vol_id should print:
  7.  
  8.   --export prints all values
  9.   -h       prints help text
  10.   -l       prints the label of the volume
  11.   -u       prints the uuid of the volume
  12.  
  13. vol_id will only return successful if the string asked for, is not
  14. empty. All trailing whitespace will be removed, spaces replaced by underscore
  15. and slashes ignored.
  16.  
  17. fstype                 probe  label  uuid  fsversion
  18. ----------------------------------------------------
  19. linux swap             *      *      *     *
  20. ext                    *      *      *     *
  21. reiserfs jr/3.5/3.6/4  *      *      *     *
  22. fat (12, 16, 32)       *      *      *     *
  23. ntfs                   *      *      *     *
  24. jfs                    *      *      *     -
  25. xfs                    *      *      *     -
  26. hfs (plus, wrapped)    *      *      *     -
  27. udf                    *      *      -     -
  28. iso9660                *      *      -     -
  29. ufs                    *      -      -     -
  30. cramfs                 *      *      -     -
  31. sysv                   *      *      -     *
  32. luks                   *      -      *     -
  33. hpfs                   *      -      -     -
  34. romfs                  *      *      -     -
  35. squashfs               *      -      -     -
  36. minix                  *      -      -     *
  37. ocfs (1, 2)            *      *      *     *
  38. vxfs                   *      -      -     *
  39. nss (netware)          *             *     *
  40. gfs, gfs2              *      -      -     -
  41.  
  42. Raid members are detected to prevent the probing for a filesystem
  43. -----------------------------------------------------------------
  44. linux raid             *      -      *     *
  45. LVM 1                  *      -      -     -
  46. LVM 2                  *      -      -     *
  47. highpoint              *      -      -     -
  48. isw_raid               *      -      -     -
  49. lsi_raid               *      -      -     -
  50. nvidia_raid            *      -      -     -
  51. promise_raid           *      -      -     -
  52. silicon_raid           *      -      -     -
  53. via_raid               *      -      -     -
  54. jmicron                *      -      -     -
  55. adaptec                *      -      -     -
  56.  
  57. If no label is found vol_id exits with nonzero and the rule will be
  58. ignored.
  59.  
  60. To give it a try, you may call it on the commandline:
  61.   $ extras/volume_id/vol_id --export /dev/sda6
  62.   ID_FS_USAGE=filesystem
  63.   ID_FS_TYPE=ext3
  64.   ID_FS_VERSION=1.0
  65.   ID_FS_UUID=3e999973-00c9-4917-9442-b7633bd95b9e
  66.   ID_FS_LABEL=devel
  67.   ID_FS_LABEL_SAFE=devel
  68.  
  69.   $ extras/volume_id/vol_id -l /dev/sda6
  70.   devel
  71.  
  72.   $ extras/volume_id/vol_id -t /dev/sda6
  73.   ext3
  74.  
  75.  
  76. Any comment/questions/concerns to me:
  77.   Kay Sievers <kay.sievers@vrfy.org>
  78.