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Newsgroups: comp.unix.bsd.freebsd.misc Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.mira.net.au!news.vbc.net!vbcnet-west!knews.uk0.vbc.net!vbcnet-gb!azure.xara.net!xara.net!uknet!usenet1.news.uk.psi.net!uknet!uknet!newsfeed.ed.ac.uk!edcogsci!richard From: richard@cogsci.ed.ac.uk (Richard Tobin) Subject: Re: AHA-1542CF and Colorado T8000es Message-ID: <E7CGxy.4Iz@cogsci.ed.ac.uk> Organization: HCRC, University of Edinburgh References: <5gp200$rt8$1@news.fas.harvard.edu> Date: Thu, 20 Mar 1997 13:46:46 GMT Lines: 48 Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:37453 In article <5gp200$rt8$1@news.fas.harvard.edu> prihodko@fas.harvard.edu (Andrew Prihodko) writes: >/kernel: st0(aha0:4:0): timed out >/kernel: st0(aha0:4:0): timed out AGAIN >Someone suggested that termination might be a problem. There are no internal >devices in the computer, so the adapter is serving the tape drive only. I >have installed a passive external terminator that came with the drive on one >of the SCSI connectors on the drive. According to the AHA-1542C series >manual, host adapter termination should be enabled through the SCSISelect >program if there are only external devices present (adapter at the end of >the cable). You are correct, both the external device and the adaptor should be terminated. >I checked switches -- termination is enabled. ? There isn't a switch to *enable* termination; there's a switch to choose between termination always on or software termination. >In case anyone knows the switch settings >for 1542, mine are: all off, except switch 5. Right, you have termination controlled by software. Ensure that you have selected termination in the SCSISelect program. >Can anyone help me with this? I have no idea what is wrong. I tried to >connect a Wangtek drive a few weeks ago and had the same problem. This suggests that the problem is not with the drive. Have you ever successfully used a SCSI device with this machine? >One thing though: the SCSI cable I am using is about 3 feet long. Could >that be the cause? 3 feet should be OK, but SCSI cabling is a common source of problems. You need to try replacing components in turn: terminator, cable, adaptor, computer (I have encountered old machines that just won't work with a 1542). Have you run the adaptor diagnostics from SCSISelect? -- Richard -- "I" is a registered trademark of Intel Corporation.