From: David Greaves <david@dgreaves.com>
To: linux-raid@vger.kernel.org
Subject: Re: Backups using RAID1
Date: Thu, 20 Nov 2008 11:48:31 +0000 [thread overview]
Message-ID: <49254E8F.1000105@dgreaves.com> (raw)
In-Reply-To: <20081120090826.GA28736@cthulhu.home.robinhill.me.uk>
Robin Hill wrote:
> Ideally you should unmount the array before failing & removing the
> drive. If this is not possible then pick a time when the IO is likely
> to be low - there's always going be a risk of corruption (especially
> with something like a database), but modern journalling filesystems
> usually cope with this okay.
If you can't unmount then essentially you want to snapshot the
filesystem/databases - some provide facilities for this.
xfs_freeze springs to mind.
At the very least you could do
sync;mdadm --fail
but that's playing with fire...
David
--
"Don't worry, you'll be fine; I saw it work in a cartoon once..."
prev parent reply other threads:[~2008-11-20 11:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-17 15:13 Backups using RAID1 Drew
[not found] ` <62c47030811191213n49a50624k4a0e167f20193a4@mail.gmail.com>
2008-11-20 2:11 ` Drew
2008-11-20 7:28 ` Max Waterman
2008-11-20 8:43 ` David Greaves
2008-11-20 15:24 ` Drew
2008-11-20 15:33 ` Jon Nelson
2008-11-20 16:12 ` Max Waterman
2008-11-20 22:20 ` Bill Davidsen
2008-11-20 9:08 ` Robin Hill
2008-11-20 11:48 ` David Greaves [this message]
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