gmirror device numbers

illoai at illoai at
Thu Apr 12 07:54:49 UTC 2007

On 11/04/07, Toomas Aas <toomas.aas at> wrote:
> Hello!
> I have a server with gmirror volumes. Backup of this server is being done
> with Amanda, which uses GNU tar and its --listed-incremental option
> (snapshot files) in order to do incremental backups.
> It seems that gmirror devices get a different 'device number' on each boot
> (each time the gmirror is created). Since the device number is stored in
> GNU tar's snapshot file, it effectively means that after rebooting GNU tar
> sees all files as having been changed since previous backup. This causes
> huge incremental backups.
> Is there a way to force a gmirror device to have a 'fixed' device number?

Not to sound too thick, but what do you mean
by "device number"?  Is this the Geom name:
or ID: field when you type:
gmirror list


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