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Date:	Tue, 19 Feb 2002 14:32:09 PST7
From:	Peter Skye <pskye@peterskye.com >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: Any limitation on hard drive size ?

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Steven Levine wrote:
>
> >Which FP did they put it into?
>
> It's a BootManager/os2ldr issue.

Wait. I thought we were talking about the motherboard BIOS? You said:
"While booting, everyone needs to agree because LBA addressing is not
used at the FP level you are running. It's just something to watch out
for with older BIOS's."

I thought BootManager and OS2LDR used the motherboard BIOS.

> >Do the IDE drives now do the LBA
> >stuff and simply tell the computer they
> >have 16 heads, 255 sectors, etc.?
>
> IDE drives have lied about the geometry since they
> went beyond the 512MB limit and perhaps before in
> some cases. This is sector translation and really
> has nothing to do with LBA. With LBA, there is an
> additional command set which addresses the drive
> by logical sector number. The traditional CHS
> method is still there along with its limits.

I've never seen the *hardware* (i.e. "on the cable") IDE command set so
don't know what info the drive expects in the commands it receives. I
last did low-level drive programming on ESDI.

- Peter

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