Date: Sat, 22 Mar 2003 22:03:41 -0500 (EST) From: Bruce Campbell <bruce@engmail.uwaterloo.ca> To: FreeBSD-gnats-submit@FreeBSD.org Cc: bruce@engmail.uwaterloo.ca Subject: kern/50201: 3ware RAID 5 resulting in data corruption Message-ID: <200303230303.h2N33fZ6075484@ecserv1.uwaterloo.ca>
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>Number: 50201 >Category: kern >Synopsis: 3ware RAID 5 resulting in data corruption >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Mar 22 19:10:05 PST 2003 >Closed-Date: >Last-Modified: >Originator: Bruce Campbell >Release: FreeBSD 4.7-RELEASE i386 >Organization: University of Waterloo >Environment: System: FreeBSD ecserv1.uwaterloo.ca 4.7-RELEASE FreeBSD 4.7-RELEASE #0: Wed Oct 9 15:08:34 GMT 2002 root@builder.freebsdmall.com:/usr/obj/usr/src/sys/GENERIC i386 >Description: A system with a 3ware 7500-8 card, and 6 Western Digital 200 GB drives, RAID 5, experiences data corruption repeatably. Complete details are at: http://www.freebsd.uwaterloo.ca/twiki/bin/view/Freebsd/BackupServerProblem The 3ware card has up to date firmware. 3ware tech support advises: "We do not support FreeBSD plus the current driver for FreeBSD has not been updated for some time to keep up with firmware changes. Please try linux instead" The author of the driver, Michael Smith, advises he has not worked on the driver in a number of years. There are reports from linux and Windows users reporting corruption when drivers and firmware were not in sync. >How-To-Repeat: Install system, and copy 250GB of data or so to the partition, and then compare the data to the originals, and some of the files show corruption, on 16K boundaries. >Fix: The use of RAID 10 instead of RAID 5 works fine. The use of RAID 5 with 3wares Write Cache turned off works fine (but slowly on writes) >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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