HP 201723-B21 - HP StorageWorks Modular SAN Array 1000 Hard Drive Reference Manual - Page 19

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Also for HP 201723-B21 - HP StorageWorks Modular SAN Array 1000 Hard Drive: Administration Manual (40 pages), Release Note (13 pages), Quick Start Instructions (8 pages), Release Note (8 pages), Release Note (8 pages), Quick Start Manual (7 pages), Release Note (5 pages), Release Note (5 pages), Replacement Instructions (4 pages)

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HP 201723-B21 - HP StorageWorks Modular SAN Array 1000 Hard Drive Reference Manual
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For more information about the MSA1000 Controller display, see the HP
StorageWorks 1000 Modular Smart Array Maintenance and Service Guide.

Array Accelerator (Battery-backed Cache)

The Array Accelerator is a high-performance, upgradeable 256-MB SDRAM
DIMM read/write battery-backed cache that can increase performance in database
and fault-tolerant configurations. It performs both protected posted-write caching
and read-ahead caching, allowing data to be accessed much faster than from disk
storage.
In protected posted-write caching, data is written to the cache memory on the
Array Accelerator rather than directly to the drives. Later, when the MSA1000
storage system is idle, the controller writes the cached data to the drive array.
HP StorageWorks 1000 Modular Smart Array Reference Guide
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Controller Display
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MSA1000 Hardware Components
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Description
Fault indicator (amber)
Display
Left push button
Up push button
Right push button
Down push button
Redundancy Link indicator (green)
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