Hitachi 9900 Series User Manual

Hitachi LUN Manager also features logical unit size expansion that dramatically

improves LUN flexibility. Up to 36 physical LUNs can be presented to the operating
system as a single, large LUN. This capability simplifies storage management because there
are fewer LUNs to manage. Two levels of password protection, user and administrator,
ensure maximum data security. Users can view only Lightning 9900

™

LUN configuration

information, while administrators can access all LUN configuration information and
functions. Administrators can customize access privileges for individual users, thus
providing maximum flexibility and control of Hitachi LUN Manager capabilities.

Hitachi Virtual Logical Volume Image Manager is a mainframe software utility that

optimizes Lightning 9900

™

capacity utilization by allowing users to configure multiple

virtual LVIs in place of a LVI. Data volumes as small as a single cylinder or as large as a full
3390-9 can be defined. Volume size is determined in cylinder increments. Each virtual
LVI requires one physical address, with a maximum of 4096 addresses per Lightning 9900

™

system. Different types of LVIs can coexist within an array group with no need to convert
them to a common LVI. This feature maximizes array group capacity and enhances
configuration flexibility. Hitachi Virtual Logical Volume Image Manager improves
performance by reducing logical device contention and operating system queuing. It
also boosts remote copy performance by avoiding the need to copy the entire volume.

Hitachi FlashAccess

™

is a software utility that allows users to dynamically “lock” and

“unlock” data into cache in real time. Read and write functions are then performed at cache
speeds, with no disk latency delay. With Hitachi FlashAccess

™

, a portion of cache memory

can be allocated to specific data. Users can add, delete, or change Hitachi FlashAccess

™

managed data at any time quickly and easily. 

Defined by the Logical Volume Image (LVI) for mainframes or Logical Unit Number

(LUN) for open systems, cache data can be as small as a single track or as large as an entire
volume. For increased configuration flexibility, Hitachi FlashAccess Manager

™

offers

multiple modes of operation. It can be used in conjunction with Hitachi RapidXchange

™

to

increase the speed of data transfer and, therefore, improve  performance of mainframe to
open systems data exchange. Hitachi RapidXchange

™

offers high-speed data transfer among

OS/390

®

, UNIX

®

, and Windows NT/2000

®

platforms. Hitachi RapidXchange

™

transfers

can be open-to-open as well as mainframe-to-open.

For open systems and S/390 volumes, Hitachi CruiseControl

™

provides automatic

performance tuning for Lightning 9900

™

Series products by automatically eliminating

performance bottlenecks. Utilizing the Lightning 9900

™

many high-speed internal paths

to optimize data placement CruiseControl

™

automatically monitors, analyzes and moves

logical volumes to eliminate “hot-spots” and provides load balancing to maintain
predetermined performance levels. Independent of the type of host attachment, the
CruiseControl

™

makes recommendations for administrator approval in either automatic

or assisted mode. CruiseControl

™

replaces time-consuming and sometimes error-prone

manual load balancing with simple automated procedures. This ensures long-range optimal
performance and reduced cost of ownership.

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