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Command Specifications
3 - 54 C141-E167
Code Name Description
0h Logical Unit Persistent reservation applies to an entire logical unit
1h Reserved Reserved
2h Element
(not supported)
Persistent reservation applies to the specified element
3h-Fh Reserved Reserved
3.1.18.3.1.1 Logical Unit scope
The "Scope" field value of the Logical Unit indicates that persistent reservations apply to the entire
Logical Unit. All of the drives supporting PERSISTENT RESERVE OUT are required to support
the scope of the Logical Unit.
3.1.18.3.1.2 Element scope (not supported by MA*3*** series product)
The "Scope" field value of the logical unit indicates that persistent reservations apply to the element
of the logical unit defined in the "Scope-specific Address" field on the PERSISTENT RESERVE
OUT parameter list. An element is defined with the SCSI-3 Medium Changer Commands (SMC)
standard. Support of Element Scope is optional.
3.1.18.3.2 Persistent reservations type
The "Type" field value defines the reservation attributes applied to data blocks within the logical
unit. Table 3.2 shows attributes for four Type values. Table 3.2 shows the code value for each Type
and requirements for the supporting drive. The requirements for the supporting drive are explained
in two paragraphs. The first paragraph describes the handling required for read operations. The
second paragraph describes the handling required for write operations.