Re: [Qemu-devel] qemu-img: unable to convert raw image > 2GB with git master

[Fam Zheng]

On Fri, 09/12 09:57, Mark Cave-Ayland wrote:
> Hi all,
> 
> I've been trying to convert a raw disk partition from my laptop for use on
> VMWare player and I'm seeing the following error from qemu-img git master
> during conversion:
> 
> # qemu-img convert -f raw -O vmdk /dev/mapper/vm-raw out.vmdk
> qemu-img: error while writing sector 4247552: Invalid argument
> 
> A quick glance at the resulting output file makes me thing that an
> artificial 2GB limit has accidentally been introduced:
> 
> # ls -l | grep out.vmdk
> -rw-r--r-- 1 root root 2147483648 Sep 12 09:49 out.vmdk
> 
> Can anyone else reproduce this? The input /dev/mapper/vm-raw is simply a raw
> 4GB LVM partition on my local disk which is mapped through as a standard
> hard disk into QEMU.
> 

Yes, I can reproduce it easily:

$ ~/build/master/qemu-io /stor/vm/arch.vmdk -c 'write 2G 1k'
write failed: Invalid argument

This is a regression, I'll send a patch to fix it shortly.

Thanks,
Fam