On Mon, Feb 27, 2012 at 07:44:00AM +0100, Helmut Hullen wrote:

Hallo, Hugo,

Du meintest am 26.02.12:

quoted

   mkfs.btrfs creates a new filesystem. The -L option sets the label
for the newly-created FS. It *cannot* be used to change the label of
an existing FS.

The safest way may be deleting this option ... it seems to work as  
expected only when I create a new FS on 1 disk/partition.

   I've said this several times: Your expectations are wrong. You
don't label partitions. You label filesystems. You are using the wrong
tool (filesystems labels) for the job (uniquely identifying
partitions).

quoted

If you want to do that, use "btrfs filesystem label".

And that seems to work as I expected - fine.

Adding a device works, deleting a device works. Fine!
Now I'll try the job with my Terabyte disks.

(Yes - I have backups ...)

Viele Gruesse!
Helmut

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