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Date: Tue, 1 Jul 2008 00:05:42 +0100
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [Qemu-devel] "A disk read error occurred"
Message-ID: <20080630230542.GD20187@shareable.org>
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To: qemu-devel@nongnu.org

Avi Kivity wrote:
> Alexander (Sasha) Sirotkin wrote:
> >For some reason when I try to boot qemu with -hda /dev/sda (or -hda
> >/dev/hda), i.e. to use the whole disk, it fails with the above error
> >"A disk read error occurred". This happens only on IBM/Lenovo laptops
> >(tried a few models), while it works just fine on any desktop I can
> >get my hands on. Probably has something to do with bios...
> >
> >  
> 
> Can you add some printfs displaying the sector numbers being read?  Some 
> disks have trouble accessing the last sector.
> 
> Also, an strace can help show the problem.

Also, sometimes when booting the BIOS can print a disk read error
message, and an appropriate -hdachs will fix it.  I found that out
when rebooting Windows 2000 after installing it from CD (both in
QEMU), on a virtual disk 1GB in size.

-- Jamie