Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!uunet!comp.vuw.ac.nz!bclwn!chris From: chris@bcl.co.nz (Chris Mackerell) Newsgroups: comp.sys.mips Subject: Problems with external SCSI devices on RC3240 Message-ID: <1991Apr4.220929.3759@bcl.co.nz> Date: 4 Apr 91 22:09:29 GMT Organization: Business Computers Ltd., Wellington, New Zealand Lines: 44 Has anyone experienced problems running multiple external SCSI peripherals off RC3240 or M120 machines? We have three systems here (2 x RC3240, 1 x M120) that seem to be incapable of handling more than one external SCSI peripheral. An RS2030 system handles the same peripherals with no problems. There is little in common between the systems. (Different customers, sites and peripherals). It doesn't seem to matter what peripherals are used (we've tried combinations of Wren drives, Maxtor drives, 8mm tapes and cartridge tapes), or what order they are connected. It doesn't seem to make any difference if the bus is externally terminated, or the last unit is internally terminated. I've checked the terminator voltage at the end of the bus and it seems ok (5v). We've swapped the motherboard on one RC3240, which improved things but hasn't cured the problem entirely. The symptoms vary with the number of devices attached, varying from failing the SCSI power on diags (with serveral devices attached), to the occasional recovered SCSI error (with one attached). All peripherals work fine in any combination when connected to a CMD SCSI controller on a MicroVAX II. Has anyone else experienced problems similar to this? Is there a cure? Thanks, Chris -- _ _ / /_) / / / / / Chris Mackerell [a/h chris@owdjim.gen.nz] / /_) / /_ / /_ / Ph: +64 (4) 801-6716 Fax: +64 (4) 85-2752 Business Computers Ltd, Box 3236, Wellington 6000, NEW ZEALAND.