From owner-aic7xxx Sun Aug 10 14:34:18 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id OAA16432 for aic7xxx-outgoing; Sun, 10 Aug 1997 14:34:18 -0700 (PDT) Received: from max1-101.ip.realtime.net (welbon@max1-101.ip.realtime.net [205.238.168.101]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id OAA16423 for ; Sun, 10 Aug 1997 14:34:13 -0700 (PDT) Received: from localhost (welbon@localhost) by max1-101.ip.realtime.net (8.8.6/8.7.3) with SMTP id QAA20473; Sun, 10 Aug 1997 16:34:14 -0500 X-Authentication-Warning: max1-101.ip.realtime.net: welbon owned process doing -bs Date: Sun, 10 Aug 1997 16:34:14 -0500 (CDT) From: Edward Welbon X-Sender: welbon@max1-61.ip.realtime.net Reply-To: welbon@bga.com To: "Daniel M. Eischen" cc: aic7xxx@freebsd.org Subject: Re: aic7xxx / AHA2940 worries... anyone? In-Reply-To: <199708100420.XAA04612@iworks.InterWorks.org> Message-ID: X-I-am-the-voice-inside-your-head: And I control you Subliminal-Message: Run linux now MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="-288528984-1457920052-871248854=:9717" Sender: owner-aic7xxx@freebsd.org X-Loop: FreeBSD.org Precedence: bulk This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. ---288528984-1457920052-871248854=:9717 Content-Type: TEXT/PLAIN; charset=US-ASCII This discussion on Linux-kernel moved to this list as it seems to involve AHA2940UW and aic7xxx.c as a central thread. I have had persistent crashs with my 2940UW's. Too bad, as the attached file shows, in my system the 2940UW are fast. On Sat, 9 Aug 1997, Daniel M. Eischen wrote: > How's your SCSI bus laid out (what devices on what cables, where is > termination, etc) and what options do you have enabled in the driver? I carefully read and followed the recomendations of the SCSI3 spec for cabling and termination. My cables are not over 1.5 meters, I have no very short segments between the connectors. I terminate at the end of the chain with the drives builtin terminators. I also explicitly set the termination in the 2940UW. I also have tried other known good (and high dollar) cables and have gotten the same results as my common sense inexpensive cables. It ain't my cables. As for my setup, I have three adapters (Asus PCI-sc875 is the adapter du jour) and each adapter has three IBM DORS32160UW drives. I have configured all nine disks as a raid0 (several partitions). Using initial ram disk support, I mount my root file system on this raid0. Here is my mdadd and mdrun. /sbin/mdadd /dev/md0 /dev/sdb2 /dev/sde2 /dev/sdh2 \ /dev/sdc2 /dev/sdf2 /dev/sdi2 \ /dev/sdd2 /dev/sdg2 /dev/sdj2 /sbin/mdrun -p0 -c64k /dev/md0 With the BusLogic BT-958 and the Asus CPI-SC875, I have no problems; so far I have run over 128 consecutive passes of Bonnie on files of 1GB or larger on both adapters and no problems. I have really pounded the Hades out of my disks with the BT-958, I have not tested the Asus quite so well but the 2940UWs die miserably within about 3 or fewer consecutive passes of bonnie on files of 2G size. The Asus handles the 2G files with aplomb (though I have only done about 16 passes, it takes a while and I get bored easily). Then the 2940 dies, a power cycle is required to restart. Since two other adapters work perfectly, I am unconvinced that it is my cables or my disks. Following are the non-commented configuration details for my scsi drivers, I included all that I have used (and build modules for) as a point of comparison. CONFIG_SCSI_AHA1542=m CONFIG_SCSI_AIC7XXX=m CONFIG_AIC7XXX_TAGGED_QUEUEING=y CONFIG_AIC7XXX_CMDS_PER_LUN=16 CONFIG_AIC7XXX_PAGE_ENABLE=y CONFIG_AIC7XXX_RESET_DELAY=15 CONFIG_SCSI_BUSLOGIC=m CONFIG_SCSI_OMIT_FLASHPOINT=y CONFIG_SCSI_NCR53C8XX=m CONFIG_SCSI_NCR53C8XX_TAGGED_QUEUE=y CONFIG_SCSI_NCR53C8XX_MAX_TAGS=12 CONFIG_SCSI_NCR53C8XX_SYNC=20 CONFIG_SCSI_NCR53C8XX_SYMBIOS_COMPAT=y I boot from the 1542 scsi and have no IDE or other boot media whatsoever. Note that the scsi drivers above are all modules. Interesting eh? /* One annoyance, Because /var is on the md0 raid, when I get a fatal oops, I don't get anything in syslog. I once had /var/log on a different file system though it didn't help, I still got no oops messages for scsi driver barfs. I get oops messages for other things, I think that not getting scsi oops messages is a consequence of the root file system mount point. */ Ed Welbon; welbon@bga.com; "We look for things" ---288528984-1457920052-871248854=:9717 Content-Type: TEXT/PLAIN; charset=US-ASCII; name=AHA-BL-NCR Content-Transfer-Encoding: BASE64 Content-ID: Content-Description: Bonnie performance comparisonsof Asus PCI-SC875,2. 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