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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!menudo.uh.edu!sugar!ficc!peter
- From: peter@ferranti.com (peter da silva)
- Subject: Re: 386BSD install problem -- can't mount /
- Message-ID: <id.AGNW.SV5@ferranti.com>
- Organization: Xenix Support, FICC
- References: <1993Jan11.022758.10164@cs.wright.edu>
- Date: Tue, 12 Jan 1993 15:18:48 GMT
- Lines: 28
-
- In article <1993Jan11.022758.10164@cs.wright.edu> corcoran@valhalla.cs.wright.edu (Michael P. Corcoran) writes:
- > Data Technology DTC6282-24 ESDI controller set for 63 sector
- > per track mapping mode which is recommended for Novell,
- > OS/2 and UNIX.
-
- Here's your problem. Either turn off the sector mapping, or find a sector
- where the mapping and the real cylinders match. At least part of the 386BSD
- boot sequence uses real track offsets. Like 0 (which is why it works when
- you do a "whole disk" install).
-
- I would suggest turning off the sector mapping. The ONLY reason for this is
- to allow DOS access to cylinders past 1024 without patching the BIOS, and
- if you're using a small DOS partition and a large BSD partition you'll never
- need that.
-
- You'll also get a performance improvement on BSD (cylinder groups end up on
- real cylinder boundaries!), and probably a little more disk space (I got an
- extra 30 MB on a Maxtor 4380E when I switched from the Compaq controller to
- my Ultrastor 12F24... and I could have gotten another 30 MB if I'd wanted
- to use BAD144 for all my bad-track mapping). It's a win all round.
-
- Insert obligatory flaming about idiot manuals that encourage bad procedures
- here, and go on to the next message...
- --
- Peter da Silva `-_-'
- Ferranti International Controls Corporation 'U`
- Sugar Land, TX 77487-5012 USA
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