A Reservation Key is specific to each I_T nexus and includes the necessary information to allow the authentication of the I_T nexus devices in order to control the reservations. This behavior is deter...A Reservation Key is specific to each I_T nexus and includes the necessary information to allow the authentication of the I_T nexus devices in order to control the reservations. This behavior is determined by the initiator at the time the reservation reserve request is sent to the target using the APTPL flag. A target reset on a NetApp SCSI target resets only those LUNs that are mapped to the initiator that is sending the target reset command.