Re: Rebuilding Software RAID Mirror in 10.5

• Subject: Re: Rebuilding Software RAID Mirror in 10.5
• From: Mike Friedman <email@hidden>
• Date: Fri, 16 Nov 2007 07:42:32 -0800
• Delivered-to: email@hidden
• Delivered-to: email@hidden

At 8:13 PM -0500 11/15/07, Dan Shoop wrote:

On Nov 15, 2007, at 4:44 PM, John May wrote:

At 12:12 PM -0800 11/15/07, Mike Friedman wrote:

On 11/15/07 2:26 PM, "Mike Friedman" <email@hidden> wrote:

Has anyone run into a problem with rebuilding a software RAID mirror
in 10.5? I tried to do this using disk utility, but I get a message
that says "unrecognized file system" when attempting to add a new disk
to the RAID.

=======================
Mike Friedman

Was this RAID, perchance, originally created in Panther?

On Nov 15, 2007, at 12:10 PM, Peter Bukowinski wrote:

No, it wasn't. It was created using the method of creating a mirror with one part missing, in order to mirror a server boot drive. (More or less what is detailed here: http://www.afp548.com/article.php?story=20040827122302975)

I've done this before (in Tiger) and not had a problem.

This appears to be a bug many people (myself included) are seeing. Supposedly booting off the OS X install CD and using Disk Utility from there to rebuild the mirror works, but I haven't tried such.

Sounds like both you and the OP was trying to manipulate the boot drive (not necessarily volume) that contained the RAID. To prevent issues Disk Utility apparently won't let you manipulate the drive since it could result in changing the partition scheme and drivers underneath you. You need to be booted off another drive. (Not just volume.)

-dhan

Actually, I wasn't working with the boot drive, but rather 2 other drives.

	- John

=======================
Mike Friedman
MGF Consulting
Computers without Attitude
http://www.mgfconsulting.net
415-648-6560 (office)
415-823-9990 (mobile)
Yahoo Messenger/AIM: sfmike64

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