[ovirt-users] ovirt 4.1.0 - sparsify ireversibly destroys preallocated disks

[Nir Soffer]

On Mon, Feb 13, 2017 at 11:18 AM, Nelson Lameiras <
nelson.lameiras at lyra-network.com> wrote:

> Hello,
>
> Not sure if it's a bug or a limitation but, while playing with oVirt 4.1
> new possibilities, I tried to use the sparsity function on a preallocated
> disk, and this action irreversibly ruined the data on the disk. I have
> repeated this experiment multiple times and always same result.
> (Sparsifying a thin provisioned disk works great though)
>
> I understand that the "sparsify" function is relevant to thin provision
> disks only. Still I think there should be a warning before doing this
> action on a preallocated disk? or maybe even forbid this action on a
> preallocated disk since sparsify has no meaning on a preallocated disk? (I
> maybe wrong...)
>

Can you give more info about the storage? block? file?

Does your storage support discard?

Nir


>
> thanks
>
> cordialement, regards,
>
>
> Nelson LAMEIRAS
> Ingénieur Systèmes et Réseaux / Systems and Networks engineer
> Tel: +33 5 32 09 09 70
> nelson.lameiras at lyra-network.com
>
> www.lyra-network.com | www.payzen.eu
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