Date: Sun, 19 Apr 1998 12:37:34 -0700 From: David Greenman <dg@root.com> To: Antti-Pekka Liedes <apl@mail.cs.hut.fi> Cc: questions@FreeBSD.ORG Subject: Re: two AHA-2940 controllers: horrible performance Message-ID: <199804191937.MAA04199@implode.root.com> In-Reply-To: Your message of "Sun, 19 Apr 1998 20:17:04 %2B0300." <19980419201704.55876@hutcs.cs.hut.fi>
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>I just tried two Adaptec AHA-2940 SCSI controllers on a ppro 180 box running >2.2.6-stable from today. The first controller that has always been used in >the machine worked as before, no problems, but the second controller had >huge performance problems. I tried a lone Sony SDT-7000 tape drive and a >lone old IBM 0662 disk in the second controller, neither could transfer more >than maybe few kB/s, being practically unusable. I got some "Timedout SCB >handled by another timeout" messages. At least the tape drive has been >working just a few days ago in my home box, a dual pentium with AHA-3940 >controller. Here's parts of dmesg: >ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 15 on pci0:17:0 >ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs >ahc0 waiting for scsi devices to settle >(ahc0:1:0): "IBM DCAS-34330W S65A" type 0 fixed SCSI 2 >sd0(ahc0:1:0): Direct-Access 4134MB (8467200 512 byte sectors) >(ahc0:2:0): "IBM DCAS-34330W S65A" type 0 fixed SCSI 2 >sd1(ahc0:2:0): Direct-Access 4134MB (8467200 512 byte sectors) >... >ahc1 <Adaptec 2940 SCSI host adapter> rev 0 int a irq 15 on pci0:20:0 >ahc1: aic7870 Single Channel, SCSI Id=7, 16 SCBs >ahc1 waiting for scsi devices to settle >(ahc1:5:0): "SONY SDT-7000 0150" type 1 removable SCSI 2 >st0(ahc1:5:0): Sequential-Access density code 0x13, 512-byte blocks, >write-enabled > >any ideas? Incorrect termination setting on the second SCSI bus? -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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