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Chapter 3 Media Changer Commands
Persistent Reserve In Command (5Eh)
98
Quantum ATL SuperLoader Software Interface Guide
The following table describes the available “Type” values from the
Type field of the PERSISTENT RESERVE IN Read Reservations
parameters.
Each of the codes provides handling instructions for READ
operations, for WRITE operations, and for subsequent attempts to
establish persistent reservations, referred to as “Additional
Reservations Allowed” in the table.
Scope
The value in this field indicates whether a persistent reservation applies
to an entire logical unit, to a part of the logical unit (defined as an extent),
or to an element.
The values for the Scope field are:
Code
Name
Description
0h
LU
Logical Unit. Persistent reservation applies to the
full logical unit. The LU scope is therefore
implemented by all device servers that implement
PERSISTENT RESERVE OUT.
1h
Obsolete
2h
Element
Persistent reservation applies to an element.
Reservations of elements. Is not supported.
3h - Fh
Reserved
Reserved
Type
The value of the Type field specifies the characteristics of the persistent
reservation being established for all data blocks within the extent or
within the logical unit. Refer to
on page 110 for the applicable
Type codes and their meanings.
Field Name
Description
Summary of Contents for ATL SuperLoader ATL
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Page 18: ...Preface Document Conventions xviii Quantum ATL SuperLoader Software Interface Guide...
Page 44: ...Chapter 2 Messages Supported SCSI Messages 26 Quantum ATL SuperLoader Software Interface Guide...
Page 196: ...Index 178 Quantum ATL SuperLoader Software Interface Guide...