When I searched the documentation, it was said that scsi-3 pr3 is supported when attaching volume from AOS 5.17.

my curiosity
1. In versions prior to 5.17, when allocating a shared volume for vm redundancy configuration, if you use Attach instead of using iscsi-initiator, does it not work?

2. Considering I/O speed and stability, which do you think is better, mounting a volume through iscsi-initiator or connecting to a VM as a direct attach?