User's Guide

Chapter 2 Media Changer Commands
Release Element (10) Command (57h)
Quantum SuperLoader 3 Software Interface Guide 114
Table 53 Release (10)
Command
Field Name Description
3rdPty
3rdPty Release allows an initiator to release a logical
unit that was previously reserved. If the value in this
field is 0, third party release is not requested. If
3rdPty = 1, then the device server shall release the
specified logical unit, but only if the initiator ID,
3rdPty bit, and third party device ID are identical
when compared to the
RESERVE command that
established the reservation.
Long ID If the
Long ID bit is set to 1, the Parameter List Length
is 8 and the eight bytes of the parameter list carry the
device ID of the third party device; the contents of the
Third Party Device ID in the CDB (byte 3) are ignored.
Element The SuperLoader 3 supports reservations only on
entire logical units. The value must be 0.
Reservation
Identification
Any value in this field is ignored by the
SuperLoader 3.
Third Party
Device ID
If the
Third Party Device ID value that is connected
with the reservation release is smaller than 255, the
LongID bit may be 0 and the ID value sent in the CDB.
If
LongID bit = 0, the Parameter List Length field
also = 0. If the
Third Party Device ID value is greater
than 255,
LongID =1.
Device servers that support device IDs greater than
255 will accept commands with
LongID =1; device
servers that do not support IDs greater than 255 may
reject commands with
LongID set = 1. Device ID
formats are protocol-specific.
Parameter
List Length
The contents of this field specify the length, in bytes,
of the parameter list that will be transferred from the
initiator to the target.
NOTE: Assuming that the
RELEASE Command Descriptor Block is valid,
the SuperLoader 3 always returns a
GOOD status for this command.
An actual release only happens if the initiator has the unit reserved for
itself or a third-party initiator.