-vol_id - partition, filesystem, disklabel reader
+vol_id - probe filesystem and read label and uuid
This program is normally called from a udev rule, to provide udev with the
-name, uuid or the filesystem type of a partition to name a device node.
-vol_id opens the blockdevice node specified at the commandline.
-The following commandline switches are supported to specify what vol_id
-should print:
-
- --export prints all values
- -h prints help text
- -l prints the label of the partition
- -u prints the uuid of the partition
+filesystem type of a volume and the label and uuid to name a device node.
+vol_id opens the blockdevice node specified at the commandline. The following
+commandline switches are supported to specify what vol_id should print:
+ --export export key/value pairs
+ --type filesystem type
+ --label filesystem label
+ --label-raw raw label
+ --uuid filesystem uuid
+ --skip-raid don't probe for raid
+ --probe-all find possibly conflicting signatures
+ --help
vol_id will only return successful if the string asked for, is not
empty. All trailing whitespace will be removed, spaces replaced by underscore
and slashes ignored.
-fstype probe label uuid fsversion
-----------------------------------------------------
+fstype probe label uuid version
+--------------------------------------------------
+linux swap * * * *
ext * * * *
reiserfs jr/3.5/3.6/4 * * * *
fat (12, 16, 32) * * * *
xfs * * * -
hfs (plus, wrapped) * * * -
udf * * - -
-iso9660 * * n/a -
+iso9660 * * - -
ufs * - - -
-linux swap * * * *
-LVM 1 * - - -
-LVM 2 * - - *
-linux raid * - * *
cramfs * * - -
sysv * * - *
luks * - * -
hpfs * - - -
-romfs *
-squashfs *
-minix *
-highpoint *
-isw_raid *
-lsi_raid *
-nvidia_raid *
-promise_raid *
-silicon_raid *
-via_raid *
-
+romfs * * - -
+squashfs * - - -
+minix * - - *
+ocfs (1, 2) * * * *
+vxfs * - - *
+nss (netware) * * *
+gfs, gfs2 * * * -
+oracleasm * * - -
-If no label is found vol_id exits with nonzero and the rule will be
-ignored.
+Raid members are detected to prevent the probing for a filesystem
+-----------------------------------------------------------------
+linux raid (md) * * * *
+LVM 1 * - - -
+LVM 2 * - - *
+ddf * - * *
+highpoint * - - -
+isw_raid * - - -
+lsi_raid * - - -
+nvidia_raid * - - -
+promise_raid * - - -
+silicon_raid * - - -
+via_raid * - - -
+jmicron * - - -
+adaptec * - - -
To give it a try, you may call it on the commandline:
$ extras/volume_id/vol_id --export /dev/sda6
ID_FS_LABEL=devel
ID_FS_LABEL_SAFE=devel
- $ extras/volume_id/vol_id -l /dev/sda6
+ $ extras/volume_id/vol_id --label /dev/sda6
devel
- $ extras/volume_id/vol_id -t /dev/sda6
+ $ extras/volume_id/vol_id --type /dev/sda6
ext3