From owner-freebsd-questions Wed Oct 9 17:41:22 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 373E937B401; Wed, 9 Oct 2002 17:41:20 -0700 (PDT) Received: from mulan.twilley.org (dsl092-188-219.sfo1.dsl.speakeasy.net [66.92.188.219]) by mx1.FreeBSD.org (Postfix) with ESMTP id 970F943E6E; Wed, 9 Oct 2002 17:41:02 -0700 (PDT) (envelope-from jmt@twilley.org) Received: from duchess.twilley.org (duchess.twilley.org [10.74.84.1]) by mulan.twilley.org (Postfix) with ESMTP id 859E923E57; Wed, 9 Oct 2002 17:42:22 -0700 (PDT) Received: by duchess.twilley.org (Postfix, from userid 1001) id C85E4312; Wed, 9 Oct 2002 17:40:37 -0700 (PDT) To: Greg 'groggy' Lehey Cc: freebsd-questions@freebsd.org Subject: Re: Corrupt data with vinum in 4.6.2-RELEASE References: <86lm58w796.fsf@duchess.twilley.org> <20021010003305.GN1415@wantadilla.lemis.com> From: Jack Twilley X-PGP-Key: 0x007F7B38 X-PGP-Fingerprint: 5315 7434 6095 DF36 995B 3407 18F1 527C 007F 7B38 X-Face: .NHAX*9Wpk.L>*/dOY%Tx85BIb;aN`:H*I7y}qDK{(&Q(zjfnli]\}|xh+mpp22}~9u.T[[ zaK{BFgnXg'rBY+GiwLccR(O/iXq"_Fhrx0+%!1N}?D(mT{T$n_q}f`!f\(,@dR~*x&{_Zn^Qm)6rV ]E,6z3JLm6k<9>^9kg:#TU-S'a3{@c,rcT7YF`M*cCg_S0e1=C?!^kg-Wy]f+Xjpe#gB]>#xi= sa4'F#mX[QH^5}1B$0.s"6Y0R["ypG0mIe;8R6H_W]*_c:1|0Z^FgjUA?dCr`b[TX (Greg 'groggy' Lehey's message of "Thu, 10 Oct 2002 10:03:05 +0930") Message-ID: <86d6qjw2gw.fsf@duchess.twilley.org> User-Agent: Gnus/5.090008 (Oort Gnus v0.08) XEmacs/21.1 (Cuyahoga Valley, i386--freebsd) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG --=-=-= Content-Transfer-Encoding: quoted-printable >>>>> "Greg" =3D=3D Greg Lehey 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