SCSI Primary Commands - 2.pdf

T10/1236-D Revision 20 18 July 20017.17 RELEASE(6) commandThe RELEASE(6) command (see table 96) is used to release a previously reserved logical unit. This subclausedescribes only those instances where the RELEASE(6) command differs from the RELEASE(10) command.Except for the instances described in this subclause, the RELEASE(6) command shall function exactly like theRELEASE(10) command (see 7.16).Table 96 — RELEASE(6) commandBitByte7 6 5 4 3 2 1 00 OPERATION CODE (17h)1 Reserved Obsolete2 Obsolete3 Reserved4 Reserved5 CONTROLThe RELEASE(6) command shall not release third-party reservations.Obsolete Bits 1 through 4 of Byte 1 provided a method, limited to device addresses 0 through 7, to handlethird-party reservations in earlier versions of the SCSI standard. The obsolete method has been replaced by theRESERVE(10) and RELEASE(10).Byte 1 Bit 0 and Byte 2 provide an obsolete way to release previously reserved extents within a logical unit. If Byte1, Bit 0 is equal to one, device servers not implementing the obsolete capability shall terminate the command withCHECK CONDITION status and the sense key shall be set to ILLEGAL REQUEST.130 dpANS SCSI Primary Commands - 2 (SPC-2)