On Sun, 2011-03-06 at 18:37 +0100, Hans-J. Ullrich wrote: > Dear developers, > > I got the proble, that a once given label is stored by udev, although the > label of the device is deleted by mlabel. > > Whenever I put it in, the device keeps its first given label, as it is stored > in its database (I guess). > > Is there a way, to configure udev so, that labels (but UUIDs) are NOT stored? > > I read, that it is no good idea, to delete the whole database at udev start, > and I wondered, if it is wanted at all, that labels are permanently stored. [...]
Labels and UUIDs are stored only on the filesystems they come from and
in the blkid cache in /etc/blkid.tab. That cache is cleared and
regenerated whenever you reboot. You can do this at any time by
running:
blkid -c /dev/null -w /etc/blkid.tab
udev does not have a database of its own; it uses blkid to look up
labels and UUIDs.
FAT filesystems actually have 2 labels, and not every tool writes to
both of them. Looking at the code, I think mlabel tries to do so, but
it might not be reliable. Try using dosfslabel instead, as I fixed that
a little while ago and am confident that it does the right thing.
Ben.
--
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.
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