Release (6)
204 SL500: Interface Reference Manual • July 2008 Revision: F • 96122
Release (6)
The 6-byte Release command (17h) enables the initiator to release unit or element
reservations of the library as set using a previous Reserve command.
Performing a unit release of a library that has no active reservations is not
considered an error. Only the initiator that performed the reservation can release
the reservation. If another initiator attempts to release a unit reservation, the
library returns good status, but does not release the reservation.
TABLE 6-78 Release Command (6)
Byte
Bit
76543210
0Operation Code (17h)
1 Ignored Reserved (0h) Element
2 Reservation Identification
3 Reserved (00h)
4 Reserved (00h)
5Control Byte (00h)
Release Element Definitions:
Element This bit indicates if the release is an element release:
■ 0 = The library or any elements reserved by the initiator are to be released
from reserved status.
■ 1 = The reserved elements associated with the Reservation Identification
field from this initiator are to be released from reserved status.
Reservation
Identification
This field is a value established by the initiator in a previous
Reserve command.
The field identifies the specific element reservation to be released.
If an invalid Reservation Identification is specified, the library returns a Check
Condition status. If the Element bit is 0, ignore this field.
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