User Manual

SCSI Commands Reference Manual, Rev. J 129

www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)

SERVICE ACTION RESERVATION KEY field

The SERVICE ACTION RESERVATION KEY field contains information needed for the following service actions: REGISTER, REGISTER AND IGNORE

EXISTING KEY, PREEMPT, PREEMPT AND ABORT, and REPLACE LOST RESERVATION. The

SERVICE ACTION RESERVATION KEY field is ignored for the fol-

lowing service actions: RESERVE, RELEASE, and CLEAR.

For the REGISTER service action and REGISTER AND IGNORE EXISTING KEY service action, the SERVICE ACTION RESERVATION KEY field contains:

a) The new reservation key to be registered in place of the registered reservation key specified in the RESERVATION KEY field; or

b) Zero to unregister the registered reservation key specified in the RESERVATION KEY field.

For the PREEMPT service action and PREEMPT AND ABORT service action, the SERVICE ACTION RESERVATION KEY field contains the reservation key of:

a) The registrations to be removed; and

b) If the SERVICE ACTION RESERVATION KEY field identifies a persistent reservation holder (see SPC-5), persistent reservations that are to be

preempted.

For the REPLACE LOST RESERVATION service action, the SERVICE ACTION RESERVATION KEY field contains the new reservation key to be regis-

tered.

SPEC_I_PT (Specify Initiator Ports) bit

0 If the Specify Initiator Ports (SPEC_I_PT) bit is set to zero, the device server shall apply the registration only to the I_T nexus that sent the

PERSISTENT RESERVE OUT command.

1 If the SPEC_I_PT bit is set to one for the REGISTER service action or the REGISTER AND IGNORE EXISTING KEY service action, then the

additional parameter data shall include a list of transport IDs (see table 91) and the device server shall also apply the registration to the

I_T nexus for each initiator port specified by a TRANSPORTID. If a registration fails for any initiator port (e.g., if the logical unit does not

have enough resources available to hold the registration information), no registrations shall be made, and the command shall be termi-

nated with CHECK CONDITION status.

Table 91 PERSISTENT RESERVE OUT specify initiator ports additional parameter data

Bit

Byte

7 6 5 4 3 2 1 0

TRANSPORTID PARAMETER DATA LENGTH (N - 27)

. . .

TransportIDs List

TransportID [first]

. . .

TransportID [last]