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Article #587

Re: Bios - Linux interaction ?

#587
From: Mike G.
Date: Thu, 01 Apr 1999 00:00
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mdwyer@holly.ColoState.EDU (Michael Dwyer):
> For all intents, Linux is smart enough to figure these things out.
> There is one major caveat that I have seen, though.  Early 2.0 kernels
> handled the big disks differently.  So, if you fdisked under an old
> kernel then moved to a new kernel the partition limits were in strange
> places...

Well, in my case it isn't, unless I use fdisk expert mode.  Without it, the
number of cylinders comes up as being far above 1024.  And even if I use fdisk,
after I make any change in the bios it's back to being above 1024; hence, back
to fdisk expert mode.  I'm running with kernel 2.2.2, which I must say is very
nice.  A bit odd how a change to the bios causes this, yet, having the bios see
the drive in LBA doesn't help.

> 
> Sorry if this didn't really answer any questions.  There is a section
> in the kernel docs about this. /usr/src/linux/Documentation/ide.txt:

This is helpful.  Although I haven't tried feeding the hdx=cyls,heads,sectors
option for lilo, it does seem rather tedious to do everytime.  It'd just be
nice if that option could be put into lilo.conf.  At any rate, I suppose I'll
just stick with expert mode after any change to my bios.  What I'm wondering
now, is where expert mode actually saves the cyl, head, sector info after
changes are made.

--
Mike G.
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From: tcsh@holly.colostate.edu (Mike G.)
Subject: Re: Bios - Linux interaction ?
Date: 1999/04/01
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Organization: Colorado State University, Fort Collins, CO  80523
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Newsgroups: csu.unix.linux