On Mon, Feb 27, 2012 at 10:15:00PM +0100, Helmut Hullen wrote:

Du meintest am 27.02.12:

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   I've said this several times: Your expectations are wrong. You
don't label partitions.

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Yes - now I know.
But I'm afraid other people also expect wrong - when I use
mkfs.ext[234] then this option works (in another way than with
"mkfs.btrfs").

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AFAIK, it works in the same way... that is, it labels the, in that
case, ext2/3/4 filesystem, in this case (mkfs.btrfs), btrfs
filesystem.

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From the manpages:

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mkfs.btrfs (aka mkbtrfs):

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       -L, --label name
              Specify a label for the filesystem.

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mkfs.ext2/3/4 (aka mke2fs):

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       -L new-volume-label
              Set  the  volume  label  for the filesystem to
	      new-volume-label.  The maximum length of the
              volume label is 16 bytes.

But there's a small difference:

        mke2fs -L MyLabel /dev/sdn4

only sets/changes the label (ok - it tests the type of the partition and  
refuses labeling if the type doesn't fit).

   That feels really weird. It wouldn't ever occur to me to look at a
mkfs tool to relabel a filesystem without destroying the data on it. I
view this behaviour as a bug.

   Hugo.

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