Hitachi 9900 Series - Manual (Page 51)

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 allows very large to very small
virtual volume configuration
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 ™ allows data to be “locked and unlocked” in cache
on-the-fly
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.
Hitachi CruiseControl ™
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.
Hitachi Data Systems
42
Hitachi Virtual Logical
Volume Image Manager
improves performance.
Hitachi FlashAccess ™
dramatically improves
performance.
Hitachi CruiseControl ™
automatically monitors,
analyzes and moves
logical volumes to
eliminate “hot-spots.”