User Manual

SCSI Commands Reference Manual, Rev. J 130
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
TRANSPORTID PARAMETER DATA LENGTH field
The TRANSPORTID PARAMETER DATA LENGTH field specifies the number of bytes of TRANSPORTIDs that follow.
The command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST:
a) If the value in the parameter list length field in the CDB does not include all of the additional parameter list bytes specified
by the TRANSPORTID PARAMETER DATA LENGTH field; or
b) If the value in the TRANSPORTID PARAMETER DATA LENGTH field results in the truncation of a TRANSPORTID.
The format of a TRANSPORTID is specified in SPC-5.
ALL_TG_PT (All Target Ports) bit
The All Target Ports (ALL_TG_PT) bit is valid only for the REGISTER service action and the REGISTER AND IGNORE EXISTING KEY service action,
and shall be ignored for all other service actions. Support for the ALL_TG_PT bit is optional.
1 If the device server receives a REGISTER service action or a REGISTER AND IGNORE EXISTING KEY service action with the ALL_TG_PT bit
set to one, it shall create the specified registration on all target ports in the SCSI target device known to the device server (i.e., as if the
same registration request had been received individually through each target port).
0 If the device server receives a REGISTER service action or a REGISTER AND IGNORE EXISTING KEY service action with the ALL_TG_PT bit
set to zero, it shall apply the registration only to the target port through which the PERSISTENT RESERVE OUT command was received.
APTPL (Activate Persist Through Power Loss) bit
1 The Activate Persist Through Power Loss (APTPL) bit is valid only for the REGISTER service action and the REGISTER AND IGNORE EXIST-
ING KEY service action, and shall be ignored for all other service actions. Support for an APTPL bit equal to one is optional. If a device
server that does not support an APTPL bit set to one receives that value in a REGISTER service action or a REGISTER AND IGNORE EXIST-
ING KEY service action, the command shall be terminated with CHECK CONDITION status, with the sense key set to ILLEGAL REQUEST,
and the additional sense code set to INVALID FIELD IN PARAMETER LIST. If the last valid APTPL bit value received by the device server is
one, the logical unit shall retain any persistent reservation(s) that may be present and all reservation keys (i.e., registrations) for all I_T
nexuses even if power is lost and later returned (see SPC-5).
0 If the last valid APTPL bit value received by the device server is zero, the loss of power in the SCSI target device shall release the per-
sistent reservation for the logical unit and remove all registered reservation keys (see SPC-5).