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Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!paladin.american.edu!howland.reston.ans.net!pipex!uknet!ukc!plato.ukc.ac.uk!cik From: cik@ukc.ac.uk (C.I.King) Newsgroups: comp.os.386bsd.questions Subject: Trouble with Adaptec 1542C & 6 Toshiba XM3401 CDROM drives Date: Mon, 22 Nov 93 11:03:24 GMT Organization: Computing Lab, University of Kent at Canterbury, UK. Lines: 21 Sender: cik@ukc.ac.uk Distribution: world Message-ID: <10@plato.ukc.ac.uk> NNTP-Posting-Host: plato.ukc.ac.uk Hello! I have a problem with my ADAPTEC 1542C SCSI card. I have 6 Double Speed CD-ROM drives mounted and after some intensive similtaneous long sequential reads (>15Mb) of the CD-ROMs the card resets all the drives. With the debugging on in the adaptec driver, I get the error message: op=28 0 0 3 a3 10 <- I always get op=28 stat 4 for mbi[15] <- these vary for different addr= 0xfe087ca4 <- CD-ROMs My hardware: Viglen Genie Professional, 4DX33, 8Mb RAM Adaptec 1542C SCSI card (ed0 at 0x280-0x29f irq 5 maddr 0xd8000) 6 TOSHIBA XM3401 Double Speed SCSI drives. If I increase the AHA_CMD_TIMEOUT_FUDGE setting, then the problem seems to occur less often. I expect it is because my machine is faster than the typical 386SX, which probably works correctly with the driver, but I am just guessing. Anybody care to advise? Thanks in advance, Colin King