Release (57) - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

7.23 RELEASE (57)

Byte
7 6
0
1 LUN
2
3
4
5
6
7
8
9 VU = 0
Figure 105. RELEASE (57)
The Release command is used to release a L U N previously reserved. It is not an error for an Initiator to
attempt to release a reservation that is not currently active. In this case, the Drive returns Good status
without altering the reservation.
Extents are not supported by the Drive. The Ext (Extent) bit must be zero and the Reservation Identifica-
tion field is ignored. If the Ext bit is not zero, Check Condition Status is returned with a Sense Key of Illegal
Request and additional sense code of Invalid Field in CDB.
If the 3rdPty bit is zero, then the third-party release option is not requested. If the 3rdPty bit is one, then
the Target releases the LUN, but only if the reservation was made using the third-party reservation option
and the 3rd Party ID is the ID of the initiator that made the reservation.
136
O E M Spec. of DDRS-3xxxx
Bit
5 4 3
Command Code = 57h
3rdPty Reserved
Reservation Identification
Third Party Device ID
Reserved = 0
Reserved = 0
Reserved = 0
Reserved = 0
Reserved = 0
Reserved = 0
2 1 0
Ext = 0
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