Virtual Disk with over 16TB

[Chris Weltzien]

Hi,

is there a option to create a disk for a vm with a size over 16TB.

the problem that after the diskfile reach 16TB, the disk get a state of read-only at this limit.
I know, that 16TB file size is max, is there a option to create the disk in mutliple files?
we want to use 22 TB. in the VM

To attach a partition directly to the vm, is not what we want to do.

best regards

Chris

[Stefan Hajnoczi (stefanha)]

On Mon, Dec 16, 2013 at 09:37:34AM -0000, Chris Weltzien wrote:
> is there a option to create a disk for a vm with a size over 16TB.
>
> the problem that after the diskfile reach 16TB, the disk get a state of read-only at this limit.
> I know, that 16TB file size is max, is there a option to create the disk in mutliple files?
> we want to use 22 TB. in the VM

Basically no, not in a clean way for a production VM. Can you attach
multiple disks to the guest and then use software RAID0 or LVM to get a
22 TB device inside the guest?

If not, here are some options:
1. Switch to a different file system (XFS is your best bet)
2. Use LVM (and get a slight performance boost for free!)
3. Tweak file system settings (e.g. bigger block size may allow larger
files)

Stefan

[Chris Weltzien (c-weltzien)]

Hi Stefan,

thank you for your response.

We're decided to only use 16Tb as vhd for the system.

best regards

Chris