SCSI Primary Commands - 2.pdf

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T10/1236-D Revision 20 18 July 2001If the LONGID bit is one, the parameter list length shall be eight, and the parameter list shall have the format shownin table 110. If the LONGID bit is one and the parameter list length is not eight, the device server shall return aCHECK CONDITION status with a sense key of ILLEGAL REQUEST.Table 110 — RESERVE(10) ID only parameter listBitByte7 6 5 4 3 2 1 00 (MSB)THIRD-PARTY DEVICE ID7 (LSB)7.21.4 Superseding reservationsSuperseding reservations is mandatory if the RELEASE(10) command is implemented. An application client thatholds a current logical unit reservation may modify that reservation by issuing another RESERVE command to thesame logical unit. The superseding RESERVE command shall release the previous reservation state when thenew reservation request is granted. The current reservation shall not be modified if the superseding reservationrequest is not granted. If the superseding reservation cannot be granted because of conflicts with a previous reservation,other than the reservation being superseded, then the device server shall return RESERVATIONCONFLICT status.NOTE 35 Superseding reservations allow the SCSI device ID in a third-party reservation to be changed. Thiscapability is necessary for certain situations when using the EXTENDED COPY command.7.22 RESERVE(6) commandThe RESERVE(6) command (see table 111) is used to reserve a logical unit. This subclause describes only thoseinstances where the RESERVE(6) command differs from the RESERVE(10) command. Except for the instancesdescribed in this subclause, the RESERVE(6) command shall function exactly like the RESERVE(10) command(see 7.21).Table 111 — RESERVE(6) commandBitByte7 6 5 4 3 2 1 00 OPERATION CODE (16h)1 Reserved Obsolete2 Obsolete34Obsolete5 CONTROLObsolete 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 The obsolete method has been replaced by theRESERVE(10) and RELEASE(10).Byte 1 Bit 0 and Bytes 2 through 4 provide an obsolete way to reserve extents within a logical unit. If Byte 1, Bit 0is equal to one, device servers not implementing the obsolete capability shall terminate the command with CHECKCONDITION status and the sense key shall be set to ILLEGAL REQUEST.158 dpANS SCSI Primary Commands - 2 (SPC-2)
18 July 2001 T10/1236-D Revision 207.23 SEND DIAGNOSTIC commandThe SEND DIAGNOSTIC command (see table 112) requests the device server to perform diagnostic operations onthe target, on the logical unit, or on both. Targets that support this command shall implement, at a minimum, thedefault self-test feature (i.e., the SELFTEST bit equal to one and a parameter list length of zero). When theSELFTEST bit is zero and the SELF-TEST CODE field contains 000b, this command is usually followed by a RECEIVEDIAGNOSTIC RESULTS (see 7.15) command.Table 112 — SEND DIAGNOSTIC commandBitByte7 6 5 4 3 2 1 00 OPERATION CODE (1Dh)1 SELF-TEST CODE PF Reserved SELFTEST DEVOFFL UNITOFFL2 Reserved3 (MSB)PARAMETER LIST LENGTH4 (LSB)5 CONTROLWhen the SELFTEST bit is one the SELF-TEST CODE field shall contain 000b. When the SELFTEST bit is zero, thecontents of SELF-TEST CODE field are specified in table 113.Value Name DescriptionTable 113 — SELF-TEST CODE field values000b001b010b011b100b101b110b111bBackgroundshort self-testBackgroundextended self-testReservedAbort backgroundself-testForegroundshort self-testForegroundextended self-testReservedThis value shall be used when the SELFTEST bit is set to one or if the SENDDIAGNOSTIC command is not invoking one of the other self-test functions suchas enclosure services (see SES) or the Translate Address page (see SBC).The device server shall start its short self-test (see 5.4.2) in the backgroundmode (see 5.4.3.2). The PARAMETER LIST LENGTH field shall contain zero.The device server shall start its extended self-test (see 5.4.2) in the backgroundmode (see 5.4.3.2). The PARAMETER LIST LENGTH field shall contain zero.The device server shall abort the current self-test running in background mode.The PARAMETER LIST LENGTH field shall contain zero. This value is only valid if aprevious SEND DIAGNOSTIC command specified a background self-test functionand that self-test has not completed. If either of these conditions is not met,then the device server shall return a CHECK CONDITION status with a sensekey of ILLEGAL REQUEST and an additional sense code of INVALID FIELD INCDB.The device server shall start its short self-test (see 5.4.2) in the foregroundmode (see 5.4.3.1). The PARAMETER LIST LENGTH field shall contain zero.The device server shall start its extended self-test (see 5.4.2) in the foregroundmode (see 5.4.3.1). The PARAMETER LIST LENGTH field shall contain zero.dpANS SCSI Primary Commands - 2 (SPC-2) 159
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