From: Michael Stumpf <mjstumpf@pobox.com>
To: linux-raid@vger.kernel.org
Subject: how to verify integrity / stability?
Date: Thu, 16 Dec 2004 19:14:22 -0600 [thread overview]
Message-ID: <41C232EE.2090504@pobox.com> (raw)
Are there scripts that someone may have written already to verify that a
raid array is functioning properly--data in == data out? I've been
running bonnie++ on it, but that doesn't seem to have an option to
verify contents read == contents written (or is that implicit).
I bring this up because a long time ago I discovered on my own that
there was a bug in the ATA VFS driver that would occasionally
double-write a byte, if memory serves, if you used certain revisions of
the VIA chipset together in an "md". History: I brought this up to the
ATA maintainer, who immediately assessed me as an idiot for daring to
think that maybe /dev/hdx is functionally equivalent to /dev/hdy.
~2.4.10ish I believe.. So now I don't trust anything.
Before I did this by copying an entire DVD rip, 8 gig, multiple times
until the array was filled, then compute the md5 sum for each, including
the source. You could reliably find one that had the "blip"... but I
never automated it. Has anyone written a script to automate this task?
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reply other threads:[~2004-12-17 1:14 UTC|newest]
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