From: Miles Fidelman <mfidelman@meetinghouse.net>
Cc: linux-raid@vger.kernel.org
Subject: Re: Missing Drives
Date: Tue, 20 Jul 2010 22:06:31 -0400 [thread overview]
Message-ID: <4C465627.5050002@meetinghouse.net> (raw)
In-Reply-To: <201007210129.41566.james@howells.uk.net>
James Howells wrote:
> Basically, I have a 5 disk RAID-5 array in an Addonics external enclosure.
> Each disk is 1TB in size. Since I am running it over USB, it's takes 3-3.5
> days to resync the disks if something goes pear-shaped.
>
>
I can't speak to your underlying problem, but if you add an internal (or
external) bitmap to your array, it speeds up rebuild time considerably.
At create time, you can use the " --bitmap=internal " option. I know
you can also add a bitmap to an existing array, but I don't remember the
magic incantation at the moment (you can probably find it by searching
the list archives - the topic has come up before). Or google "write
intent bitmap."
Miles Fidelman
--
In theory, there is no difference between theory and practice.
In<fnord> practice, there is. .... Yogi Berra
prev parent reply other threads:[~2010-07-21 2:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-21 0:29 Missing Drives James Howells
2010-07-21 1:23 ` Mark Knecht
2010-07-21 2:06 ` Miles Fidelman [this message]
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