From: "Dan Williams" <dan.j.williams@intel.com>
To: Jan Engelhardt <jengelh@linux01.gwdg.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: RAID rebuild on Create
Date: Mon, 30 Apr 2007 11:19:24 -0700 [thread overview]
Message-ID: <e9c3a7c20704301119v1c69aaf0xb272fe85697934cd@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0704301958530.29151@yvahk01.tjqt.qr>
On 4/30/07, Jan Engelhardt <jengelh@linux01.gwdg.de> wrote:
> Hi list,
>
>
> when a user does `mdadm -C /dev/md0 -l <any> -n <whatever fits>
> <devices>`, the array gets rebuilt for at least RAID1 and RAID5, even if
> the disk contents are most likely not of importance (otherwise we would
> not be creating a raid array right now). Could not this needless resync
> be skipped - what do you think?
>
If you want his behavior you can always create the array with a
'missing' device to hold off the resync process. Otherwise, if all
disks are available, why not let the array make forward progress to a
protected state?
Also, the resync thread automatically yields to new data coming into
the array, so you can effectively sync an array by writing to all the
blocks.
>
> Jan
--
Dan
next prev parent reply other threads:[~2007-04-30 18:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-30 18:00 RAID rebuild on Create Jan Engelhardt
2007-04-30 18:19 ` Dan Williams [this message]
2007-04-30 18:35 ` Jan Engelhardt
2007-04-30 18:54 ` Patrick_Boyd
2007-04-30 19:27 ` Jan Engelhardt
2007-04-30 20:12 ` David Greaves
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