3.7.18 Flashaccess; 3.7.19 Cache Manager - Hitachi 9900 User And Reference Manual

3.7.18 FlashAccess

FlashAccess allows users to store specific data in cache memory. FlashAccess increases the
data access speed for the cache-resident data by enabling read and write I/Os to be
performed at front-end host data transfer speeds. The FlashAccess cache areas (called cache
extents) are dynamic and can be added and deleted at any time. The 9900 subsystem
supports up to 1,024 addressable cache extents.
FlashAccess operations can be performed for open-system LUs (e.g., OPEN-3, -8, -9) as well
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as S/390 LVIs (e.g., 3390-3/9, 3380-K), including custom-size volumes. Use of FlashAccess in
conjunction with the Virtual LVI/LUN feature will achieve better performance improvements
than when either of these options is used individually.
Note: For further information on FlashAccess, please see the Hitachi Lightning 9900™
FlashAccess User's Guide (MK-90RD004), or contact your Hitachi Data Systems account team.

3.7.19 Cache Manager

Cache Manager enables users to perform FlashAccess operations on S/390
commands from the S/390
Cache Manager, please see the Hitachi Lightning 9900™ Cache Manager User's Guide
(MK-91RD045), or contact your Hitachi Data Systems account team.
48 Chapter 3 Functional and Operational Characteristics
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host system to the 9900 subsystem. For further information on
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LVIs by issuing