2.4 - Storage
Shared storage devices (real or virtual) must be visible to all nodes in the cluster that are to be configured to be capable of running the associated ZFS pools. There is however no requirement for device naming to be identical across all nodes.
Other than iSCSI devices, where virtual storage devices are being used for testing, , disk reservations using SCSI-2 or PGR3 are not supported and should be disabled.
NOTE - Disk heartbeats should generally not be used on SSD devices as this may reduce the lifespan of these devices