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Path: sserve!manuel!munnari.oz.au!mips!mips!swrinde!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!Germany.EU.net!bs From: bs@Germany.EU.net (Bernard Steiner) Newsgroups: comp.unix.bsd Subject: Re: 2nd drive file ... (Actually wd ESDI problems) Message-ID: <16dfmeINN3u7@disaster.Germany.EU.net> Date: 13 Aug 92 11:05:49 GMT References: <Bsp5D6.B9p@obiwan.uucp> <165f2uINN6an@disaster.Germany.EU.net> <tih.713450893@barsoom> <193@asgard.mlb.dmt.csiro.au> Organization: EUnet Backbone, Dortmund, Germany Lines: 40 NNTP-Posting-Host: walhalla.germany.eu.net In article <193@asgard.mlb.dmt.csiro.au>, mjj@mlb.dmt.csiro.au (Murray Jensen) writes: > tih@barsoom.nhh.no (Tom Ivar Helbekkmo): > > bs@Germany.EU.net (Bernard Steiner) writes: > >>I noticed that with my ESDI drives I had to give disklabel one cylinder less > >>than what the physical drive parameters are... > > I thought of this too, but I've tried reducing the number of available > > cylinders to about a fourth of the real number with no improvement... The *instructions* for my second drive claim it's got 969 cyls of which 967 are "user accessible" - hmm. I allocated 968... > Now on to my problem: someone posted about using dd on the block device to > find out where the bad sectors are. [...] > (Trick - use the > following: "dd if=/dev/wd0c of=/dev/null bs=512 conv=sync,noerror" and you > will get all the bad blocks in one hit [...] > However, fsck would still fail - quite badly too - obviously because there > were still bad sectors on the disk. But I had not got any errors from dd on > the block device, so I tried fsck on the block device and it ran through > perfectly! Well, I don't have DOS. However, I noticed that dd'ing off 386bsd pertitions will not find all bad blocks, whereas dd'ing off the 'd' 'partition' does. BTW did your kernel actually print out the bad sectors or are you using a modified kernel ? If it's the standard thing it does, would you mind telling us about any magic flags you gave disklabel. Thanks Bernard -- Bernard Steiner, FB Informatik/IRB, Uni Dortmund, vox +49 231 755 2444 Postfach 500500, D-W-4600 Dortmund 50, Germany fax +49 231 755 2386 bs@Germany.EU.net ...!uunet!unido!bs *III And they gave it Instructions, but knew it not. } From The Book of Nome, *IV It is, they said, a Box with a Funny Voice. } Mezzanine v.III-IV