Hi Demeter,
my guess is that you have a linux system running there.Usually even in a 
SAN-based environement , we keep our Bare-Metal Hosts with LUNs no bigger than 
2 TB.
Picking 16TB as a single disk is a poor choice and I would recommend you to do 
a "pvmove" on the OS to smaller disks .
Best Regards,Strahil Nikolov
    В неделя, 12 януари 2020 г., 18:04:18 ч. Гринуич+2, Pavel Bar 
<[email protected]> написа:  
 
 Hi,Can you please provide more details?1) Origin domain type.2) Destination 
domain type & size.3) Was VM up or not? Live Migration?4) Engine logs if you 
have.
Thanks!
Pavel

On Thu, Jan 9, 2020 at 12:29 PM Demeter Tibor <[email protected]> wrote:

Dear Users,
I have exactly same problem.When I trying to migrate a big (16 TB) disk image 
to an another storage domain, i've got this error message:
Error while executing action: Cannot move Virtual Disk. Low disk space on 
Storage Domain Backup.

But I have a lot of space...
Ovirt 4.3.7
Please help me what can I do?
Regards,
Tibor

----- 2019. nov.. 13., 11:11, <[email protected]> írta:

The update fixes the issue.

Thanks

De: "Benny Zlotnik" <[email protected]>
Para: [email protected]
Cc: "users" <[email protected]>
Enviadas: Terça-feira, 12 De Novembro de 2019 11:48:47
Assunto: Re: [ovirt-users] Low disk space on Storage

This was fixed in 4.3.6, I suggest upgrading

On Tue, Nov 12, 2019 at 12:45 PM <[email protected]> wrote:
>
> Hi,
>
> I'm running ovirt Version:4.3.4.3-1.el7
> My filesystem disk has 30 GB free space.
> Cannot start a VM due to an I/O error storage.
> When tryng to move the disk to another storage domain get this error:
> Error while executing action: Cannot move Virtual Disk. Low disk space on 
> Storage Domain DATA4.
>
> The sum of pre-allocated disk is the total of the storage domain disk.
>
> Any idea what can I do to move a disk to other storage domain?
>
> Many thanks
>
> --
> ________________________________
> Jose Ferradeira
> http://www.logicworks.pt
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