Thanks it worked on 
Version 4.5.6-1.el9, CentOS 9 

De: "Gianluca Cecchi" <gianluca.cec...@gmail.com> 
Para: "suporte" <supo...@logicworks.pt> 
Cc: "users" <users@ovirt.org> 
Itens enviados: Quinta-feira, 28 de Novembro de 2024 12:22:31 
Assunto: Re: [ovirt-users] Changing Disk Alocation Policy 

On Thu, Nov 28, 2024 at 11:42 AM José Ferradeira via Users < [ 
mailto:users@ovirt.org | users@ovirt.org ] > wrote: 



Hi, 

It's possible to change a thin-provision disk to a preallocated disk? 

Storages are ISCSI 

Thanks 





there was an old thread about it at the time of 4.0/4.1. 
What it worked and I verified still works in 4.5 is: 
VM is powered on or off (with pros and cons for both scenarios in case of 
production machine) 
create a snapshot of the VM 
select the snapshot line under snapshots and select clone button 
in resource allocation section of the new vm screen change allocation policy 
for the desired disk/s from thin provision to preallocated 
Then you can decommission old VM and use the cloned one 

HIH, 
Gianluca 

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