Hi, On a DELL R770, it appears that the DELL PERC H965i card hard-codes the block size to 4096 bytes when creating a RAID, regardless of whether ‘512, 4096 or both’ is selected.
The result is that you cannot create a VDI on the SR created with the RAID because the logical and physical block size is 4096.
[]# cat /sys/class/block/sda/queue/physical_block_size
4096
[]# cat /sys/class/block/sda/queue/logical_block_size
4096

I have opened a ticket with DELL, but have you already encountered and resolved this issue, which seems to date back several months?