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SCSI Commands: 34BRELEASE
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152
3.22
RELEASE
The RELEASE command releases a current drive reservation, if the command is
received from the Initiator that established the reservation.
Any RELEASE command that arrives from other than the originating requester is
ignored and Good Status is returned in response to the command.
Third Party reservations are not supported.
It is not an error to attempt to release an ID that is not currently reserved to the
requesting Initiator. A reservation cannot be released if another Initiator made the
reservation. Other events and conditions that can cause a reservation to be released
are discussed under the RESERVE command.
3.22.1
RELEASE Command Descriptor Blocks
3.22.1.1
RELEASE(6) Command Descriptor Block
Byte
Bits
7 6 5 4 3 2 1 0
0
Operation Code (17h)
1
Ignored LUN
Reserved
2
Reserved
3
Reserved
4
Reserved
5
Control
3.22.1.2
RELEASE(6) Command Field Descriptions
Field Bytes
Bits
Description
Operation
Code
0
The Operation code for the 6-byte version of RELEASE is 17h.
Ignored
Logical Unit
1
5-7
The LUN field is vestigial from the SCSI-1 standard and is ignored.
Reserved
All reserved bits must be 0.
Control 5 See
SCSI Command Control Byte Format on page 25.
3.22.1.3
RELEASE(10) Command Descriptor Block
Byte
Bits
7 6 5 4 3 2 1 0
0
Operation Code (57h)
1
Ignored LUN
Reserved
2
Reserved
3
Ignored Third Party Device ID
4
Reserved
5
Reserved
6
Reserved
7
Reserved
Summary of Contents for LTO 4
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