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Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!paladin.american.edu!europa.eng.gtefsd.com!howland.reston.ans.net!vixen.cso.uiuc.edu!sdd.hp.com!sgiblab!cs.uoregon.edu!news.uoregon.edu!usenet.coe.montana.edu!bsd.coe.montana.edu!nate From: nate@bsd.coe.montana.edu (Nate Williams) Newsgroups: comp.os.386bsd.misc Subject: Re: Kernel panics, SCSI cables and a 1742 in enhanced mode Date: 11 Feb 1994 10:34:31 GMT Organization: Montana State University - Bozeman MT Lines: 31 Message-ID: <2jfmvn$ak1@pdq.coe.montana.edu> References: <2jbah4$dua@hcshh.hcs.de> NNTP-Posting-Host: bsd.coe.montana.edu Keywords: SCSI (x)xxxBSD panic In article <2jbah4$dua@hcshh.hcs.de>, Hellmuth Michaelis <hm@hcshh.hcs.de} wrote: }A followup to an earlier article: } }Two weeks ago, i added to the following configuration: } } Adaptec 1742 running in enhanced mode } SCSI-2 disk (fast) } SCSI-1 disk (slow) .... }kernel panics: } ahb0: timeout } ahb0: timeout }In the 1742 user manual i found that if there are "hangs" and one has drives }of very diffent speeds on the bus, one has to adjust the maximum synchronous }transfer speeds in the EISA configuration - which i did, they are set at }10 Mb/s by default; i set the maximum speed for the "new" slow disk to 5Mb/s }and since a week everything runs fine (under heavy load). All the new cards that I have seen now use 5MB/s as the default to overcome this behavior. (I haven't checked the new Adapatec stuff though) Nate -- nate@bsd.coe.montana.edu | FreeBSD core member and all around tech nate@cs.montana.edu | weenie. work #: (406) 994-4836 | Graduating May '94 with a BS in EE home #: (406) 586-0579 | - looking for work in CS/EE field.