[SOLVED] mount command and fstab show different file systems

I recently setup my /etc/fstab to mount by LABEL.
LABEL=ArchLinux / ext2 rw,noatime,errors=continue 0 0
LABEL=Data30GB /data ext2 rw,noatime 0 0
When I reboot, these two drives work fine. But I run the "mount" command and it shows:
/dev/disk/by-uuid/8fac6ab0-3d40-4676-bf30-b23c482b47b9 on / type ext2 (rw,noatime,errors=continue)
/dev/sdb1 on /data type ext2 (rw,noatime)
I'm curious, why does mount not list things by how the fstab shows them? By the way, I have other drives labeled and mounted by label and it shows the device (i.e. /dev/sdd1) instead of the LABEL as fstab shows on those as well.
Anyone know why?
Last edited by HuckleSmothered (2011-08-06 19:38:35)

LABEL= and UUID= aren't something the kernel understands -- they're tags interpreted by blkid that resolve to a device, e.g.:
$ blkid -lt LABEL=root -o device
/dev/sda2
This functionality is provided by util-linux's libblkid, which /bin/mount links against. In other words, that syntax in /etc/fstab is just a convenience feature.
Last edited by falconindy (2011-08-06 19:30:09)

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