Date: Wed, 19 Apr 2000 13:14:26 +0200
From: Arndt Schoenewald <[EMAIL PROTECTED]>
Subject: Re: How To Get Win95 etc. on my prospective L70 Hard Drive Upgrade?
On Tue, Apr 18, 2000 at 08:49:57PM -0700, Garry Wiegand wrote:
> Date: Tue, 18 Apr 2000 11:38:41 -0400
> From: Garry Wiegand <[EMAIL PROTECTED]>
> Subject: Re: How To Get Win95 etc. on my prospective L70 Hard Drive Upgrade?
>
> Arndt Schoenewald <[EMAIL PROTECTED]> wrote:
> >I usually connect both drives to the 2 IDE channels of a desktop PC
> >using two 2.5"->3.5" adapters, and then use Partition Magic to copy
> >everything over and perhaps adjust the sizes of the partitions so
> >they fill the new drive (which is of course always bigger than the
> >old one ;-)
>
> This procedure has failed completely for me in the past. The Libretto BIOS
> reserves the last ~64MB of the drive to itself, to hold the hibernation data.
> This changes the drive geometry that the software sees, making it different
> from the same drive as seen from a desktop. If you lay out partitions on the
> Libretto, and then plug the drive into a desktop, my experience is that you
> can copy data using programs like XCOPY, but programs like Partition Magic
> (or at least my old version) will refuse to try to touch the disk. If on the
> other hand you lay out the partitions on the desktop, and then plug the drive
> into the Libretto, the first time the Libretto hibernates it will overwrite
> 64 megabytes of your file system data. This is bad.
Well, it's true that you need to take some care getting hibernation to work
if you don't do the partitioning on the Libretto. (With a harddrive > 8GB,
you cannot do the partitioning on the Libretto, since the Libretto's BIOS
can only see the first 8GB.)
On the Libretto 100 (I only have a Libretto 100, so I don't know whether the
older models 50/70 are any different), the BIOS doesn't alter the geometry,
but it pretends that the drive has some cylinders less.
With the typical geometry of 255 heads and 63 sectors = 1 cylinder (LBA),
each cylinder holds slightly less than 8MB, thus one needs to reserve 9
cylinders, i.e. around 72MB, for the Libretto 100 hibernation area. Just
leave that much spare space at the end of the disk and it should work
fine (however, if your drive is > 8GB, I argue that the spare space must
be 9 cylinders just before the 8GB boundary).
Arndt
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