Release:(17 ); Release - Hitachi DK32EJ - Ultrastar Series 36.9 GB Hard Drive Reference Manual

6.20 RELEASE:(17

Bit
Byte
0
1 Logical Unit Number
2
3
4
5 Vendor Unique
The RELEASE command releases a logical unit that is previously reserved by a host
computer. No error must be informed if a RELEASE command is issued to a logical
unit that is not reserved.
The controller is considered as support of only the RESERVE (10) command in order
to specify Third Party Device ID by AL_PA to third party reserve.
The Extent bit must always be set to 0 as this SCSI controller does not support the
extent release feature.
CHECK CONDITION status with ILLEGAL REQUEST sense key.
The controller ignores the Reservation Identification that is used by the extent
release feature.
(1) Logical unit release
The RELEASE command releases the logical unit that is reserved by the
current host computer.
(2) Third party release
The third-party release feature of the Release command allows the host
computer to release a logical unit that is reserved by the third party reservation
feature.
When the 3rdPty (Third Party) bit is set to 0, the third party release feature is
disabled. In this case, the controller ignores the Third Party Device ID field.
When the 3rdPty bit is set to 1, the controller releases the logical unit from the
reserved state provided that the reservation has been carried out by the same
host computer on the same SCSI device specified in the Third Party Device ID
field.
The Third Party Device ID field contains the AL_PA for the SCSI device to
release the logical unit.
RELEASE:(17h)
6 COMMAND DESCRIPTIONS
)
H
7 6 5
0 0 0
Reservation Identification
0 0 0
0 0 0
0 0 0
If this condition is violated, the controller creates the
4 3
Operation Code (17
H
1 0
3rdPty Third Party Device ID
Reserved
0 0
Reserved
0 0
Reserved
0 0
OEM MANUAL:K6602771
2 1
)
1 1
Extent
0 0
0 0
Flag Link
0
Revision: 2 / Date: 2002.12.19
Page: 251 / 313
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