HP C2246 Technical Reference Manual page 97

Release
Release
The RELEASE command is used to release previously reserved logical units. It is not an
error for an Initiator to attempt to release a reservation that is not currently active. In this
case, the Target returns GOOD status without altering any other reservation. A 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.
Release Command Descriptor Block (COB)
Bit
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
00 Opcode= 17H
01 Logical Unit Number
I
3RDPTY
I
Third Party Device ID
I
XTNT=O
02 Reservation Identification = 00
03-04 {MSB=03) · Reserved (LSB=04)
05
Control Byte
3RDPTY (Third-Party). If the 3RDPTY bit is set to one (1), the Target shall release the
specified logical unit, but only if the reservation was made using the third-party reservation
option
by
the same Initiator for the
s~me
SCSI device as specified in the Third-Party Device
ID field. If the 3RDPTY bit is set to zero (0), the third-party release option is not requested.
SCSI Command Descriptions A-41