From: Paul Clements <paul.clements@steeleye.com>
To: linux-raid@vger.kernel.org
Subject: Re: Bug report: mdadm -E oddity
Date: Fri, 20 May 2005 16:05:11 -0400 [thread overview]
Message-ID: <428E42F7.40208@steeleye.com> (raw)
In-Reply-To: <d5n1m2-rb5.ln1@news.it.uc3m.es>
Peter T. Breuer wrote:
> b) rewriting is not necessarily idempotent, when half of it consists
> of using a parity to construct what you should write.
That's right. The rewrite is not idempotent. Having lost part, or all,
of either D1 or P at the time of the crash, you no longer have any
accurate way of reconstructing D2.
And that's assuming you can even do a rewrite. By default, only metadata
is journalled (in ext3), so for plain old data writes, you're just plain
out of luck...
--
Paul
next prev parent reply other threads:[~2005-05-20 20:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-13 15:44 Bug report: mdadm -E oddity Doug Ledford
2005-05-13 17:11 ` Doug Ledford
2005-05-13 23:01 ` Neil Brown
2005-05-14 13:28 ` Doug Ledford
2005-05-15 17:32 ` Luca Berra
2005-05-20 7:00 ` Neil Brown
2005-05-20 12:30 ` Doug Ledford
2005-05-20 16:04 ` Paul Clements
2005-05-20 17:16 ` Peter T. Breuer
2005-05-20 18:40 ` Doug Ledford
2005-05-20 19:15 ` Peter T. Breuer
2005-05-20 21:31 ` Doug Ledford
2005-05-20 17:45 ` Doug Ledford
2005-05-20 18:33 ` Peter T. Breuer
2005-05-20 20:01 ` berk walker
2005-05-20 21:00 ` Gil
2005-05-20 21:51 ` Peter T. Breuer
2005-05-20 22:14 ` berk walker
2005-05-20 20:05 ` Paul Clements [this message]
2005-05-16 16:46 ` Doug Ledford
2005-05-20 7:08 ` Neil Brown
2005-05-20 11:29 ` Doug Ledford
2005-05-16 22:11 ` Doug Ledford
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