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Date: Tue, 24 May 2005 09:14:07 +0200

From: DervishD <lkml@dervishd.net>
To: Petr Vandrovec <vandrove@vc.cvut.cz>
Cc: Jeff Garzik <jgarzik@pobox.com>,
Linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [RESEND] Hard disk LBA sector count is not always the same

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References: <20050523121424.GB339@DervishD> <42922175.8090005@pobox.com> <20050523200221.GE57@DervishD> <42925760.9010603@vc.cvut.cz>

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Hi Petr :)

Thanks for your answer :)

* Petr Vandrovec <vandrove@vc.cvut.cz> dixit:
> >>DervishD wrote:
> >>> current capacity is 156299375
> >>> native capacity is 156301488
> >>Hard drives have a feature that can reserve a certain amount of space=
=20
> >>away from the user.
> > Yes, I know, but the problem is that 2.4 kernels *does* reserve
> >that space but 2.6 certainly not, and if I boot into 2.6 and then
> >reboot into 2.4, then 2.4 *does NOT* reserve that space.
> Yes. It is normal...

I'm surprised :??? Does 2.6 'stroking' by default? I supposed
that maybe Debian people had activated stroking...
=20
> > See the paragraph above: if I partition the disk under 2.6 the
> >partition will have a bigger address than the one that will be
> >available under 2.4, and that can give errors while accessing that
> >extra sectors. What can I do? For technical limitations in my box, I
> >have to use 2.6 for repartitioning that disk (and I will be doing
> >that in less than a month) and this will lead to unaccesible sectors
> >when I boot back into my usual 2.4 kernel :(
> (1) You do not have to create partition over full disk.

I would prefer to do it. Otherwise I have to calculate where the
partition must end in order to not disturb the kernel. Moreover, in
that space will go the swap partition, probably...
=20
> (2) If you'll build your 2.4.x kernel with CONFIG_IDEDISK_STROKE=3Dy
> ('Auto-Geometry Resizing support'), I bet that your problems with 2.4.x
> kernels disappear.

I'll try right now... YES, it works!. I don't understand, my BIOS
is AMI, not Awards, and I assumed that the stroke option was used
only for Awards BIOS'es. I've looked at the code in the kernel and it
doesn't seem to be particular for Award :?? It should be specified in
the documentation.

Thanks a lot for your suggestion and for solving my problem :)

Ra=FAl N=FA=F1ez de Arenas Coronado

--=20
Linux Registered User 88736 | http://www.dervishd.net
http://www.pleyades.net & http://www.gotesdelluna.net
It's my PC and I'll cry if I want to...
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