Tell me how to increase the virtual disk with ZFS?

Vladislav Prodan universite at
Sat May 11 14:26:33 UTC 2013

> On May 11, 2013, at 8:59 AM, "Vladislav Prodan" <universite at> wrote:
> > Add another virtual disk and do a RAID0 - not an option. It is not clear how to distribute the data from the old virtual disk to the new virtual disk.

> The other option would be to add an additional disk that is as large as you want to the VM, attach it to the zpool as a mirror. The mirror vdev will only be as large as the original device, but once the mirror completes resilvering, you can remove the old device and grow the remaining device to full size (it may do that anyway based on the setting of the auto expand property of the zpool. The default under 9.1 is NOT to autoexpand:
> root at FreeBSD2:/root # zpool get autoexpand rootpool
> rootpool  autoexpand  off     default
> root at FreeBSD2:/root # 

I did not realize that there was such an interesting and useful option :)

# zpool get autoexpand tank
tank  autoexpand  off     default

Vladislav V. Prodan            
System & Network Administrator           
+380 67 4584408, +380 99 4060508

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