[101386] in RedHat Linux List
RE: partition size
daemon@ATHENA.MIT.EDU (Richardson,Anthony)
Wed Nov 25 20:07:14 1998
Date: Thu, 26 Nov 1998 08:04:00 -0500
From: "Richardson,Anthony" <ARichard@stark.cc.oh.us>
To: UNIXMAN <jzygmont@alpha.confederationc.on.ca>,
redhat-list <redhat-list@redhat.com>
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
UNIXMAN wrote:
> How can that be? From what I know, LBA divides the number of
> cylinders
> by 4 and multiplies the number of heads by 4. This gives you
> a limit of
> 8.4 GB. Unless you mean that this is a BIOS limitation and
> has no effect
> on the drive, which would mean that it's like using a large
> drive without
> LBA.?
Nope. You're talking about CHS translation and not LBA mode.
In LBA mode the sectors are accessed by sector number from
1 to 2^28, not by cylinder/head/sector. With LBA the disk
limit size is (2^28 sectors x 512 bytes/sector) = 128 GB or
137 billion bytes. Don't take my word for it though, see
http://www.quantum.com/src/whitepapers/8.4barrier.html
or search the Web for the Hale Landis "How It Works" series of
documents.
Tony
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