About SCSI persistent reserve commands
When a device receives an exclusive access type SCSI persistent reservation command, it does not process commands from any other HBA. The device processes commands from another HBA only when the HBA that owns the SCSI persistent reservation clears the reservation. If an application sends a command to a reserved device, the device fails the command by returning a status of RESERVATION CONFLICT. The only exceptions to this action are several commands that cannot interfere with the reservation, such as Inquiry or Request Sense.
A device stays reserved until one of the following events occurs on the device:
Released by the HBA that reserved it
Power cycled (usually)
Preempted by a SCSI persistent reserve command