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RELEASE 6.Command Specification
SONY AIT-5 drive SDX-1100V series Ver.1.0 6-77
6.18. RELEASE (6/10) 17h and 57h
RELEASE( 6) CDB format
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation Code (17h)
1 Reserved Obsolete
2 Reserved
3 Reserved
4 Reserved
5 Control
RELEASE (10) CDB format
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation Code (57h)
1 Reserved 3rdPty Reserved LongID Obsolete
2 Obsolete
3 Third Party Device ID
4 Reserved
5 Reserved
6 Reserved
7-8 Parameter List Length
9 Control
This RELEASE command releases the drive if it was reserved by the requesting initiator using a RESERVE (6/10)
command and is still in the reserved state. See PERSISTENT RESERVE OUT/IN for an alternate reservation
system. This command cannot release a reservation generated by the PERSISTENT RESERVE OUT command.
Third party reservation management operations are only allowed using RESERVE (10) and RELEASE (10).
Logical unit reservation management operations are allowed using RESERVE (6/10) and RELEASE (6/10).
3rdPty: The Third-Party release option for the RELEASE command allows an initiator to release a logical unit that
was previously reserved using the Third-Party reservation option.
If the 3rdPty bit is ZERO, then the Third-Party release option is not requested. If the 3rdPty bit is one, then the
drive is released, if the reservation was made using the Third-Party reservation option by the initiator that is
requesting the release and for the same SCSI device as specified in the Third-Party Device ID field.
If the 3rdPty bit is ONE, the Logical Unit releases the specified logical unit, but only if the initiator, 3rdPty bit, and
Third Party Device ID fields (in CDB or in Parameter List) are identical when compared to the values used in the
RESERVE (10) command that established the reservation.
Long ID: If the Long ID bit is set to 1b and the Parameter List Length is 8, the parameter list contains the eight
bytes of the device ID of the Third Party Device ID.
If the 3rdPty bit is zero, the LONGID bit field is ignored.
Third Party Device ID: If the Third Party Device ID value that is connected with the reservation release is equal to
or smaller than 255 (FFh), the LongID field may be 0b and the Third Party Device ID value is sent in this field.
The contents of the Third Party Device ID field in the CDB is ignored when LongID = 1b;
Note: If the Third Party Device ID value is greater than 255 (FFh), LongID must be set to 1b.