zfs discuss - May 2011 - Adjusting the volblocksize for iscsi VMFS backing stores

I posted this to the forums a little while ago but I believe the list
was split at the time:

Does anyone have any recommendations for changing the ZFS volblocksize
when creating zfs volumes to serve as VMFS backing stores?

I''ve seen several people recommend that the volblocksize be set to 64k
in this situation- but without much explanation.

What are the advantages and disadvantages to using a 64k size in this case?

Any insights are appreciated.

Thanks,
-Don