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Large (>1024) hard disks

Posted on 1997-07-12
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Last Modified: 2013-12-15
Hi

I'm planning to upgrade my hard drive soon, and I'm since the hard drive will probably have >1024 cylinders I might run into problems. My BIOS seems to support large hard disks, because my parents have the same BIOS and their large drive works in Win95 (so far, at least :-). My main worry is LILO:

1. Will it work if the image is outside the 1024 mark?
2. Do I need any special options in lilo.conf? (I think I say LINEAR mentioned somewhere in the docs, which I didn't understand at all :-(

Thanks
Bruce
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Question by:bungholio
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Expert Comment

by:deatsch
ID: 1628592
Bruce,
what version/implementation of Linux?  Redhat? Slackware?
Linux does not care about size of drives, that is a funciton of your bios.  Generally speaking if the bios is newer than 1994 you're all set.
The default LILO setup should work just fine.  I'm using Redhat V4.1 with no problems.
Jim
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Accepted Solution

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sauron earned 150 total points
ID: 1628593
Linux does not use the BIOS to access your hard disk, the kernel contains drivers for your disk controller, and Linux uses those.

LILO does use the BIOS, as at boot, it has no other option. Many modern BIOS's however, have logic that remaps the cylinder layout on hard disks with more than 1024 cylinders. With a new BIOS and a new drive, you should have no trouble - my HD has 2100 or so cylinders, but is reported as only having 641 when I use cfdisk. If you are unlucky enough to have trouble, the best way round it is to create a small partition to boot from, which will contain your kernel, and make sure this partition is at the beginning of the disk, with an ending cylinder < 1024.
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