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vol_id - probe filesystem and read label and uuid
vol_id will only return with a non-zero exit code if the string asked for,
is not empty. All trailing whitespace will be removed, spaces replaced by
underscore and slashes ignored.
Unmangled values are available in the --export mode as hex-encoded strings
in *_ENC= keys.
$ extras/volume_id/vol_id --export /dev/sda6
ID_FS_USAGE=filesystem
ID_FS_TYPE=ext3
ID_FS_VERSION=1.0
ID_FS_UUID=3e999973-00c9-4917-9442-b7633bd95b9e
ID_FS_UUID_ENC=3e999973-00c9-4917-9442-b7633bd95b9e
ID_FS_LABEL=devel
ID_FS_LABEL_ENC=devel
$ extras/volume_id/vol_id --label /dev/sda6
devel
$ extras/volume_id/vol_id --type /dev/sda6
ext3
fstype probe label uuid version
--------------------------------------------------
linux swap * * * *
btrfs * * * -
ext * * * *
reiserfs jr/3.5/3.6/4 * * * *
fat (12, 16, 32) * * * *
ntfs * * * *
jfs * * * -
xfs * * * -
hfs (plus, wrapped) * * * -
udf * * - -
iso9660 * * - -
ufs * - - -
cramfs * * - -
sysv * * - *
luks * - * -
hpfs * * - -
romfs * * - -
squashfs * - - -
minix * - - *
ocfs (1, 2) * * * *
vxfs * - - *
nss (netware) * - * *
gfs, gfs2 * * * -
oracleasm * * - -
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 * - - -
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