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Path: sserve!newshost.anu.edu.au!munnari.oz.au!yoyo.aarnet.edu.au!myall.awadi.com.au!blymn From: blymn@awadi.com.au (Brett Lymn) Newsgroups: comp.os.386bsd.questions Subject: Re: Problems with NetBSD-08 and ESDI - Please help! Date: 12 Aug 1993 02:32:09 GMT Organization: AWA Defence Industries Lines: 22 Message-ID: <BLYMN.93Aug11203209@mallee.awadi.com.au> References: <244ule$cke@netbsd08.telecom.com.au> NNTP-Posting-Host: mallee.awadi.com.au In-reply-to: tdwyer@netbsd08.telecom.com.au's message of 9 Aug 1993 15:33:52 +0800 >>>>> On 9 Aug 1993 15:33:52 +0800, tdwyer@netbsd08.telecom.com.au (Terry Dwyer 491 5161) said: I tried replying via mail to this but I think your reply address (both with and without netbsd08 in it) are not correct. TD> off. I have tried alternate sector mapping on and off, set the drive SPT TD> (according to manufacturers specs) to 34 and 36, used the ESDI bios to TD> low level format the drive, and WDFMT (a WD utility), to do the same. TD> There is a difference in the way the formatters work - the BIOS utility TD> appears to replace every bad sector found with a sector it maps in from TD> the last two cylinders of the drive hence moving sectors to a different TD> rack on the disk. The WDFMT util seems to mark the bad sectors (in place), TD> and leaves the drive geometry alone. Needless to say, none of the above When I format my esdi (300Meg CDC with DTC controller) I select the "sector sparing" option which, from what I understand, allocates one sector per track as spare and will map this sector in if format finds a bad sector. Sector sparing works well on a disk with few defects. After formatting with sector sparing I treat the disk as a defect free disk. -- Brett Lymn