Change blocksize on live system

[datnus]

Hi guys,
I'm using FreeNas 8.3 and use blocksize 4k for zvol.
And I want to change the blocksize 8k using zfs set hlocksize=8k Data/Dataxx
Can I do it on a live system? Or do I need to move data out before changing blocksize?

Tks so much for helps

 

[cyberjock]

I'm pretty sure you can only set/change the blocksize on zvol creation.

 

[datnus]

I believe we recordsize can change live https://blogs.oracle.com/roch/entry/tuning_zfs_recordsize
But we can't do so with volblocksize.