Date: Thu, 23 Feb 2006 23:30:36 +0200 From: Ruslan Ermilov <ru@FreeBSD.org> To: Michael Reifenberger <mike@Reifenberger.com> Cc: FreeBSD Stable <freebsd-stable@FreeBSD.org>, pjd@FreeBSD.org Subject: Re: graid3 data corruption?!? Message-ID: <20060223213036.GD47860@ip.net.ua> In-Reply-To: <20060223131549.V38816@fw.reifenberger.com>
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[-- Attachment #1 --] On Thu, Feb 23, 2006 at 01:31:16PM +0100, Michael Reifenberger wrote: > Hi, > I'm having 5 firewire Disks in one graid3 set. > and using a fresh STABLE on SMP with an dual AMD64 in i386 mode. > > While doing an md5 checksum of all files in the filesystem > (~770GB of data) on disk died. graid3 did the right thing > and disconnected the disk. > > BUT: > after diffing the md5sums of the files on large file (probably the one > that got checked during the disk failure) had an different md5sum than > before. > --- md5_11.log Fri Dec 9 13:23:07 2005 > +++ md5_12.log Wed Feb 22 18:03:03 2006 > @@ -4460,3 +4460,3 @@ > MD5 (Backup/totum/root_0_050211_i386.dmp.gz) = > 5a3e7b03f48ea4c2cba10624edd996cf > -MD5 (Backup/totum/root_0_050715.dmp.gz) = 0e154301cbec84571d1df94bf68e3d79 > +MD5 (Backup/totum/root_0_050715.dmp.gz) = 172d7c12b78f3f191c184d467e31a53c > MD5 (RIP/.pgp/PGPMacBinaryMappings.txt) = bf1b637a3a69bcbb8d4177be46a1c3ac > > BUT: > doing a fresh md5sum now in degraded mode of the file I get again > (the correct) value of: > MD5 (Backup/totum/root_0_050715.dmp.gz) = 0e154301cbec84571d1df94bf68e3d79 > > For me this means, that graid3 gave incorrect data during the disk los. > This shouldn't happen! > > Any clues how this could happen? > Has anyone else seen this behaviour? > Yes, we saw it too. We hope that the last commit to g_raid3.c (in HEAD) may fix it as well. Cheers, -- Ruslan Ermilov ru@FreeBSD.org FreeBSD committer [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFD/il8qRfpzJluFF4RArXVAJ9p8mFSnsapicRYlcU+mD8RwokGIgCeLja4 dhqpDRT2WnUw+Bh3tynszyQ= =WIjj -----END PGP SIGNATURE-----help
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