[Libguestfs] Virt-v2v conversion issue

Richard W.M. Jones rjones at redhat.com
Wed Oct 15 12:08:36 UTC 2014


On Wed, Oct 15, 2014 at 12:03:26PM +0000, VONDRA Alain wrote:
> Rich,
> The results of the guestfish command :
> 
> ><fs> part-list /dev/sda
> [0] = {
>   part_num: 1
>   part_start: 1048576
>   part_end: 85906685951
>   part_size: 85905637376
> }
> ><fs> part-list /dev/sdb
> [0] = {
>   part_num: 1
>   part_start: 32256
>   part_end: 322126640639
>   part_size: 322126608384
> }
[etc]

Ah .. this does explain why the fstrim failed on every disk apart from
/dev/sda.

My patches to implement fstrim in NTFS give up unless the partition is
aligned sufficiently:

http://comments.gmane.org/gmane.comp.file-systems.ntfs-3g.devel/1074

/dev/sda is sufficiently aligned, but the other 8 disks are not.

This is rather unfortunate for you because fstrim would undoubtedly
have saved network bandwidth as well as making qemu-img do less.

At least that mystery is solved.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-df lists disk usage of guests without needing to install any
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