As part of Improvement 7487 to remove the hardcoded Nexenta block size value, a new abiquo.storagemanager.nexenta.blocksize property was introduced in Abiquo 2.6.7 and 3.0.1. If you do not set this property, the default block size of 8 KB will be used.
Abiquo supports Nexenta block sizes from 8 KB to 128 KB. Nexenta requires the block size to be a power of 2. The block size is only validated by Nexenta and it will accept values set with this property of 8, 16, 32, 64, and 128. Abiquo recommends that the block size should be at least 8 KB.