102
Chapter 5 Functional and Operational Characteristics
5.6
Data Management Features and Functions
These features include:
Cache Residency Manager Function
LUN Manager Function
Data Retention Utility Function
LUN Expansion Function
Password Protection Function
5.6.1
Cache Residency Manager Function
The Cache Residency Manager function ensures that all data in an LU is stored in cache
memory. All read/write commands to the LU can be executed by cache hit 100% without
accessing the drive. The system throughput is improved when this function is applied to an
LU that contains data accessed frequently because no latency period is needed to access the
disk drive.
5.6.2
LUN Manager Function
The LUN Manager has four main functions: Fibre security control and host group (for Fibre
Channel interface), or iSCSI security control and target (for iSCSI interface).
Fibre Channel Interface
The Fibre security control function controls the access from specific hosts or specific
commands.
This function enables the subsystem to respond to each connected host (even within the
same port) by grouping connected hosts within a port and setting the logical unit
mapping and the Host Connection mode for each host group.
iSCSI Interface
The iSCSI security function controls access from specified hosts or specific commands.
The target group function enables the subsystem to respond to each connected host
(even within the same port) by grouping the connected hosts within a port and setting
the locial unit mapping and Host Connection mode for each group. Up to 128 targets can
be set for one port. Authentication can be performed for each target by using the CHAP
authentication concurrently.
5.6.3
Data Retention Utility Function
The Data Retention Utility feature prevents the logical unit (volume) from being accessed
illegally by the host.
Summary of Contents for HDS AMS200
Page 1: ...MK 95DF713 03 Acer HDS AMS200 User and Reference Guide ...
Page 2: ......
Page 6: ...vi Preface ...
Page 9: ...Acer HDS AMS200 User and Reference Guide ix ...
Page 10: ......
Page 18: ...xviii Contents ...
Page 28: ...8 Chapter 1 Overview of the AMS200 Subsystem ...
Page 112: ...92 Chapter 4 Subsystem Architecture and Components ...
Page 128: ...108 Chapter 5 Functional and Operational Characteristics ...
Page 142: ...122 Chapter 6 Configuring the AMS200 Subsystem ...
Page 220: ...200 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem Ð ...
Page 224: ...204 Chapter 7 Configuring Storage on the Thunder 9530 V Series Subsystem ...
Page 227: ...Acer HDS AMS200 User and Reference Guide 207 ...
Page 248: ...228 Chapter 8 Troubleshooting Figure 8 11 NNC Information Screen ...
Page 292: ...272 Chapter 9 Periodic Maintenance ...
Page 294: ...274 Chapter 9 Periodic Maintenance ...
Page 300: ...280 Appendix B System Parameter Settings List ...
Page 328: ...308 Appendix D Interfaces ...