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Newsgroups: comp.os.386bsd.questions Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msunews!caen!zip.eecs.umich.edu!newsxfer.itd.umich.edu!gatech!howland.reston.ans.net!news.sprintlink.net!news.indirect.com!wes From: wes@indirect.com (Barnacle Wes) Subject: Re: FreeBSD and Adaptec 1542CF SCSI Message-ID: <D07Epo.Gvu@indirect.com> Sender: usenet@indirect.com (System Operator) Organization: Internet Direct, indirect.com Date: Fri, 2 Dec 1994 22:05:48 GMT References: <3b2u2e$27u@scoob.xap.com> <Roy-2711942134250001@adept.cts.com> <9412012201.35@rmkhome.com> <3bng94$iaf@Mars.mcs.com> X-Newsreader: TIN [version 1.2.1 [BP] PL2.1] Lines: 27 Christopher Hilton (chilton@MCS.COM) wrote: : I repeat: The early 1542C and CF's had really cheesy SCSI linde : drivers (hardware) and as a result are really affected by cable length : and type. I don't have the SCSI spec in from of me anymoe (not my job : anymore) But I seem to remember the spec saying something like 3 : meters is the maximum cable length. Stick with that. If you're stuck : in the English system of measurement 3 meters == 9' 10.11" or closer to : 10' then 9'. Rick, your cable is probably within spec. Connector quality, cable quality, termination, and the care with which the whole mess was assembled affect this also. At my previous employer, our tape production machine was a SPARCstation-1 with two disk drives and three tape drives (QIC-150, DAT, & 8MM), all *external*, and in separate cases. Quite a nightmare. If your situation is anything like this, you might want to consider buying a PC tower-style case for $35 or so and putting all of your external SCSI devices in the one case. One or two external connectors and a single internal ribbon cable should suffice to connect them all together, and one external cable to the CPU will cut down on the number of connections in the chain. It also makes it easier to power up all of your external devices, but make sure the power supply can handle the start-up surge of all your devices, or set them for power-on startup delay. Wes Peters