Daniel.G.Roberts on 29 Aug 2007 20:18:33 -0000


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RE: [PLUG] How to break a software RAID mirror?


I think I am running mirrored pair..RAID0..how can I tell for sure?
Thanks
Dan 

-----Original Message-----
From: plug-bounces@lists.phillylinux.org
[mailto:plug-bounces@lists.phillylinux.org] On Behalf Of David Coulson
Sent: Wednesday, August 29, 2007 4:04 PM
To: Philadelphia Linux User's Group Discussion List
Subject: Re: [PLUG] How to break a software RAID mirror?

What RAID level.

You can break RAID-1, and it'll keep working. It'll complain it's
missing part of the array, but it will still work.

mdadm has a fail (mdadm -f /dev/md0 /dev/sdb1 or something) option that
will allow you to fake a failed drive, then you can use mdadm to take it
out of the array.

Daniel.G.Roberts@sanofi-aventis.com wrote:
> Hi All
>
> My system has two scsi disks that are software RAIDED together and 
> mounted.
> I also have a third disk which has a bootable linux OS.
> My question is..
> Can I safely break the software mirror between the first two scsi 
> disks without losing data on the first disk so that I can use the 
> second disk for something brand new?
> Thanks for any advice?!
> Sincerely
> DAn
>
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