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Path: sserve!newshost.anu.edu.au!munnari.oz.au!spool.mu.edu!howland.reston.ans.net!cs.utexas.edu!natinst.com!hrd769.brooks.af.mil!hrd769.brooks.af.mil!not-for-mail From: burgess@hrd769.brooks.af.mil (Dave Burgess) Newsgroups: comp.os.386bsd.questions Subject: Re: Adaptec 1542b and geometry translation Date: 4 Feb 1994 15:39:22 -0600 Organization: Armstrong Laboratory, Brooks AFB, TX Lines: 33 Message-ID: <2iufao$12l@hrd769.brooks.af.mil> References: <1994Feb03.220402.109186@ipgaix.unipg.it> <vanepp.760376417@sfu.ca> NNTP-Posting-Host: hrd769.brooks.af.mil In article <vanepp.760376417@sfu.ca>, Peter Van Epp <vanepp@fraser.sfu.ca> wrote: }peppe@ipgaix.unipg.it (Giuseppe Vitillaro) writes: } }>I just switched my disk from the an old IDE/SCSI }>controller to Adaptec 1542b SCSI controller. } }>I noted that Adaptec 1542b is doing geometry }>translation (1Mb = 1 cyl) and I already have }>DOS installed (and I want to keep it). } }>For what I know geometry translation cannot }>be disabled in 1542b. Is that true? If this }>is the case should I apply what I found at point }>2.5.5 of the faq (that seems a pontentially dangerous }>partition machinery)? } }The 1542 applies geometry translation always, for both DOS and FreeBSD (unlike }some IDE controllers), so partition the drive with fdisk or pfdisk and feed }FreeBSD the DOS geometry and partition offsets. Works fine. } I will firm that up in the FAQ this week-end, and with any luc\k at all, I should have a new version of the FAQ up this week. Sorry about the lack of new FAQ lately; I have been having SLIP troubles from home. TSgt Dave -- TSgt Dave Burgess NCOIC Applications Programming Branch US Strategic Command, Offutt AFB, NE burgessd@j64.stratcom.af.mil