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Date:      Fri, 01 Nov 2002 10:29:43 -0500 (EST)
From:      John Baldwin <jhb@FreeBSD.org>
To:        stephan mantler <step@acm.org>
Cc:        freebsd-current@FreeBSD.org
Subject:   Re: -current install on large disk in non-LBA mode
Message-ID:  <XFMail.20021101102943.jhb@FreeBSD.org>
In-Reply-To: <3DC28C34.1020309@acm.org>

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On 01-Nov-2002 stephan mantler wrote:
> John Baldwin wrote:
>> Sectors more than 63 are not allowed for IDE drives at all.
>> What happens when you use the LBA geometry?  Does the drive
>> not boot properly after being installed?
> 
> Well, I did try LBA as well, but couldn't boot at all. boot2 did
> let me look at the root directory, but any further investigation
> (like trying 0:da(0,a)/boot/? ) produced junk and/or killed boot2.
> The Windows partition also didn't boot.
> 
> Btw. according to http://www.pcguide.com/ref/hdd/bios/modesECHS-c.html
> the CHS parameters *are* within limits of the IDE/ATA standard;
> the "Large" mode is off limits since it can't get the Cylinder
> cound below 1024 without exceeding the max Heads.
> 
> *sigh* what a mess :-)

The problem is that the _BIOS_ restricts to 63 sectors per head. :)
Not ATA.  If windows is the first slice on the disk then it might
seem to work ok by accident.

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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