Brian Stempin on 29 Aug 2007 20:27:48 -0000


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

  • From: "Brian Stempin" <brian.stempin@gmail.com>
  • To: "Philadelphia Linux User's Group Discussion List" <plug@lists.phillylinux.org>
  • Subject: Re: [PLUG] How to break a software RAID mirror?
  • Date: Wed, 29 Aug 2007 16:27:34 -0400
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Daniel,
  
     Another way to see is to read the mdadm config file.
     sudo vi /etc/mdadm/mdadm.conf

Brian
On 8/29/07, Daniel.G.Roberts@sanofi-aventis.com <Daniel.G.Roberts@sanofi-aventis.com> wrote:
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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