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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!newsfeed.direct.ca!news.maxwell.syr.edu!news.sgi.com!news.tamu.edu!news.utdallas.edu!nrchh45.rich.nt.com!bcarh189.bnr.ca!bmerhc5e.bnr.ca!news From: Francois <fdrolet@nortel.ca> Newsgroups: comp.periphs.scsi,comp.sys.hp.hpux,comp.unix.bsd.misc Subject: Re: Changing block size of SCSI Hard disks ? Date: 18 Mar 1997 19:28:33 GMT Organization: Bell Northern Research Lines: 17 Message-ID: <5gmqd1$foh@bmerhc5e.bnr.ca> References: <5gkgn5$6jm@bmerhc5e.bnr.ca> <332E9F38.1C9D@nct.ch> NNTP-Posting-Host: bmerh11.bnr.ca Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 1.1N (X11; I; HP-UX A.09.05 9000/712) To: m.zingg@nct.ch X-URL: news:332E9F38.1C9D@nct.ch Xref: euryale.cc.adfa.oz.au comp.periphs.scsi:73454 comp.sys.hp.hpux:56242 comp.unix.bsd.misc:2852 >By reading page 3 and setting mode sense CDB byte 3 to 0x43 the drive >should tell you which bit's can be changed. If you read the SCSI specs, >they tell you that the drive shall return check condition if any of the >"reserved" or unchagable bit's are set. What I try to tell you is that >you may accidentialy set one of the unchangable bit's in page 3 and that >this is the cause of the error. I did this, that is how I found out that almost everything in that page is reserved. Funny thing is on a SEAGATE ST32171W Baracuda Drive I can set the block size to anything and the drive doesn't send me a check condition it simply ignores it, confirmed by doing a mode sense with CDB byte 3 to 0xC3. >Hope this helps thanks for the reply