Date: Sun, 21 Oct 2007 09:19:35 +0200 From: Peter Schuller <peter.schuller@infidyne.com> To: freebsd-stable@freebsd.org Subject: FYI: Promise TX4 silent corruption (RELENG_7) Message-ID: <20071021071935.GA64397@hyperion.scode.org>
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--jRHKVT23PllUwdXP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello, The following is not a request for help or bug report as such, I just want to put the information out there in case it helps other people by encouraging active checking for silent data corruption (also happens to be a good "saved yet again by ZFS" story). I was moving some disks to a machine that didn't have SATA ports for them, so I took one of the TX4:s I had left over since some previous desperate attempts to get working SATA in another machine. At first, things *seemed* good. No DMA timeouts or anything like that. Streamed through 4 250 gig drives no problem; ran a bunch of rsyncs of ports trees during the night. However, once I started dd:ing large files and reading them back in I started getting I/O errors from ZFS, because of checksum mismatches. Turns out all the drives connected to the TX4 in the raidz2 were generating checksum errors (the one that was not connected to the TX4 was fine). Write a 2-3 gig file of zeroes -> handful of checksum mismatches on subsequent scrub. Since then I have now tried two distinct TX4 cards (but only in one PCI slot). Both suffer from the same problem. Amazingly a SiI 3114 *does* seem to work in the same PCI slot - no corruption, and no DMA timeouts and whatnot that I was expecting from a SiI card. This was on amd64, RELENG_7. Same SATA cables used on all drives. Drives on TX4 were also in a Supermicro hotswap enclosure, which may or may not be related (but again, no problem with SiI). --=20 / Peter Schuller PGP userID: 0xE9758B7D or 'Peter Schuller <peter.schuller@infidyne.com>' Key retrieval: Send an E-Mail to getpgpkey@scode.org E-Mail: peter.schuller@infidyne.com Web: http://www.scode.org --jRHKVT23PllUwdXP Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFHGv2HDNor2+l1i30RAoJ/AJ4/uyKaEpwNbyPA9qoyLYaAbNnXAgCeN+T6 reoRk8mq7qwZXK6itv79Bs0= =UAN1 -----END PGP SIGNATURE----- --jRHKVT23PllUwdXP--
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