home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!olivea!decwrl!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!atropa!berger
- From: berger@atropa (Mike Berger)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: SCSI controllers & int 13h bios call
- Keywords: Adaptec SCSI
- Message-ID: <BszpBF.4s1@news.cso.uiuc.edu>
- Date: 14 Aug 92 20:09:15 GMT
- References: <gburke.713693365@unix2.tcd.ie>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: University of Illinois at Urbana
- Lines: 21
-
- gburke@unix2.tcd.ie (Garrett Burke) writes:
- > Could any of you SCSI gurus out there please confirm this:
- >Page 7-5 of the Adaptec AHA-1740A/1742A/1744 Tech. Ref. Man. states:
- >'SCSI devices are addressed by logical block address without regard to
- >the physical geometry of the disk. For this reason, all SCSI devices are
- >defined as drives with 64 heads and 32 sectors/track'
- > ^^ ^^
- >Q: Can I take this as true i.e use #define HEADS 64 etc when writing
- >software for creating boot blocks?
-
- >From experience it seems to be true and would make things easier to do.
- *----
- Yes, as long as you never update the controlware on your Adaptec
- board, and always use controllers of the same vintage, you can
- make that assumption. But don't bet that the 64-head remapping
- will always be standard.
- --
- Mike Berger
- Department of Statistics, University of Illinois
- AT&TNET 217-244-6067
- Internet berger@atropa.stat.uiuc.edu
-