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- Newsgroups: comp.unix.bsd
- From: jaggy@purplet.demon.co.uk (Mike Jagdis)
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!sdd.hp.com!zaphod.mps.ohio-state.edu!cs.utexas.edu!news.uta.edu!hermes.chpc.utexas.edu!news.utdallas.edu!corpgate!bnrgate!bnr.co.uk!pipex!demon!purplet!jaggy
- Subject: Drive geometries
- Organization: FidoNet node 2:252/305 - The Purple Tentacle, Reading
- Date: Wed, 4 Nov 1992 22:16:08 +0000
- Message-ID: <44.2AF5C5E8@purplet.demon.co.uk>
- Sender: usenet@gate.demon.co.uk
- Lines: 38
-
- Well, I decided to have yet another bash at getting 386bsd to live in a
- partition on my HD and share it with Linux...
-
- Firstly the drive is a Maxtor LXT535A IDE. The postage stamp, er, manual I
- got with the drive gives several recommendations for CMOS parameters, the
- two that give the highest capacity being 1024 cylinders, 16 heads, 63
- sectors and 1036 cylinders, 16 heads, 63 sectors. Another piece of paper I
- got with another Maxtor drive give physical specifications for several
- drives among them the LXT535A which it says has 11 data heads and 1560
- cylinders.
-
- Hmmm... The 1024 and 1036 look like DOS-isms. I tried the physical
- parameters. No joy. Classic failure - unable to read disklabel after the
- kernel has loaded.
-
- No problem. Run Frank's ide_conf. The drive seems to be claiming to be
- 1024x16x63. Hey! I *know* it's bigger than that! The manual gives 1036 as a
- possible config!
-
- Tried it. No joy. Install hangs before it even asks me if I want to
- install in the 386bsd partition. I can ^C out though, so maybe this is
- something other the device driver barfing?
-
- Just to check I set the parameters to 1560x11x63 and used Linux to build
- filesystems all over - no problems, it seems valid. (An extra cylinder
- killed it).
-
- Moral? Well, just because a drive has a default geometry doesn't mean it
- should be automatically prefered. It seems that even if I installed 386bsd
- on the whole drive I would be better off running it with a translated
- geometry since it lies about the number of heads it has by default!?!
-
-
- Mike
-
- (BTW Anyone any clues as to why install hangs now? It worked with my
- initial attempts when using the geometry from the physcial spec. but not now
- with the default geometry.)
-