Am Mittwoch, den 07.09.2005, 13:17 +0100 schrieb Mike Williams:
> On Wednesday 07 September 2005 12:58, Christoph Gysin wrote:
> > First, let me recommend you mdadm. It's a replacement for the old
> > raidtools. *Much* better IMHO.
> 
> VERY much so.
> 
> > - Create a new RAID1 in degraded state from B2:
> > # mdadm --create /dev/md0 --level 1 --raid-devices 2 /dev/B2 missing
> >
> > - Copy contents from A2 to md0
> > - umount A2
> > - add A2 to md0:
> > # mdadm /dev/md0 --add /dev/A2
> 
> Quicker method :)
> 
> create B1 and B2
> umount /dev/A2
> # mdadm --create /dev/md0 -l1 -n2 /dev/A2 /dev/B2
> 
> You CAN create a mirror of an existing partition, and NOT lose data.
> I know, I've done it.

Uuuuh - that sounds MUCH better. I really thought that A2 will be lost
by all means. I will definitely try your method. Thanx for your help!

> You can also re-create an existing array (instead of the obvious 
> re-assembly), 
> and keep all your data.
> The software raid drivers and tools are surprisingly intelligent.
> 
> But as always, keep backups :)
> 
> -- 
> Mike Williams
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