From: Richard Scobie <richard@sauce.co.nz>
To: Linux RAID Mailing List <linux-raid@vger.kernel.org>
Subject: Re: how to recreate a raid5 array with n-1 drives?
Date: Tue, 06 May 2008 19:17:52 +1200 [thread overview]
Message-ID: <48200620.6060600@sauce.co.nz> (raw)
In-Reply-To: <20080506054819.GA6413@merlins.org>
Marc MERLIN wrote:
> In the olden days (pre-mdadm), I could bring up the array by giving 5 drives
> and marking /dev/sde1 as failed-disk instead of read-disk (or somesuch).
>
> I could not find a way to do this with mdadm in the man page. How do I give
> /dev/sde1 on the command line as a failed drive?
Looking at the mdadm man page in the "CREATE MODE" section:
"To create a "degraded" array in which some devices are missing, simply
give the word "missing" in place of a device name. This will cause
mdadm to leave the corresponding slot in the array empty. For a RAID4
or RAID5 array at most one slot can be "missing"; for a RAID6 array at
most two slots. For a RAID1 array, only one real device needs to be
given. All of the others can be "missing"."
Regards,
Richard
next prev parent reply other threads:[~2008-05-06 7:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-06 5:48 how to recreate a raid5 array with n-1 drives? Marc MERLIN
2008-05-06 7:17 ` Richard Scobie [this message]
2008-05-06 23:08 ` mdadm create corrupted md data? Marc MERLIN
2008-05-07 5:38 ` Dan Williams
2008-05-07 6:56 ` Marc MERLIN
2008-05-07 9:29 ` David Greaves
2008-05-07 15:08 ` Marc MERLIN
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