Date: Wed, 09 Oct 2002 17:40:31 -0700 From: Jack Twilley <jmt@twilley.org> To: Greg 'groggy' Lehey <grog@FreeBSD.org> Cc: freebsd-questions@freebsd.org Subject: Re: Corrupt data with vinum in 4.6.2-RELEASE Message-ID: <86d6qjw2gw.fsf@duchess.twilley.org> In-Reply-To: <20021010003305.GN1415@wantadilla.lemis.com> (Greg 'groggy' Lehey's message of "Thu, 10 Oct 2002 10:03:05 %2B0930") References: <86lm58w796.fsf@duchess.twilley.org> <20021010003305.GN1415@wantadilla.lemis.com>
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--=-=-= Content-Transfer-Encoding: quoted-printable >>>>> "Greg" =3D=3D Greg Lehey <Greg> writes: Jack> I had a bad experience this weekend with vinum, SCSI and new Jack> disks, and I'm not sure which part's at fault. Greg> Well, you're getting mulitple error messages from the SCSI Greg> subsystem, and none from Vinum. True. But is vinum supposed to detect the SCSI errors and do something about it, like protect my data from corruption? I don't know, which is one of the reasons I asked here. Jack> I installed ten new 4G disks, built two striped plexes of five Jack> disks each, and mirrored them. Two drives on the second plex Jack> generated pages of SCSI errors on the console when I was Jack> populating the new volume from my backups. Many of the files Jack> were corrupted in the restore. The vinum statistics reported no Jack> errors for the drive. I stopped the second plex, rebooted, and Jack> did another restore. The restore went flawlessly. I started Jack> the second plex, and the same two drives generated pages of SCSI Jack> errors on the console. Still no errors reported by vinum. The Jack> files were corrupted. What's going on here? Greg> I don't know. All I see is SCSI errors. That shouldn't cause Greg> corruption, but then neither should Vinum. I'd suggest you Greg> attend to the SCSI problems and see if the others go away; I'd Greg> expect them to. If you want to follow the Vinum aspect, see the Greg> man page for details of how to solve problems. Well, suggestions on how to attend to the SCSI problems would be appreciated. The hardware appears to pass self-tests. The cabling is run properly. My tape drive is on the same bus and my backups have passed multiple spot checks so I don't think it's a termination issue. If there's any extra debugging I can enable to test the card or anything like that, please let me know. I'm very interested in being able to sleep without nightmares of lost data. =20 Jack. =2D-=20 Jack Twilley jmt at twilley dot org http colon slash slash www dot twilley dot org slash tilde jmt slash --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (FreeBSD) iD8DBQA9pMyFGPFSfAB/ezgRAnn3AKCVRxd1E9ujG8KC977t6ma3r6G1vQCcCMtI PYGuSpNi4xfFp4MI0IMVF18= =vifH -----END PGP SIGNATURE----- --=-=-=-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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