Cache Memory - Hitachi G1000 Hardware Manual

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Cache memory

The VSP G1000, VSP G1500, and VSP F1500 can be configured with 64 GB to
1 TB of cache memory per controller. The cache memory is installed in one or
two cache path control adapters (CPA). A CPA feature consists of a pair of
redundant blades that are installed and work together to provide cache and
shared memory for the system. The following figure shows two CPAs (2-3,
and 1-4).
Cache memory modules (DIMMs) are available in either 16 GB or 32 GB
sizes. The minimum memory required per controller is 64 GB, either two 16
GB DIMMs or one 32 GB DIMM must be installed in each CPA blade. The
memory modules in a system must all be the same size.
The following table shows minimum and maximum cache capacities per
controller. The figures are doubled for a two-controller system.
# of controller chassis
configuration
VSP G1000, VSP
G1500, and VSP F1500
including a Primary
controller chassis only
VSP G1000, VSP
G1500, and VSP F1500
including both a
Primary and Secondary
controller chassis
Notes:
1. One DIMM minimum, eight DIMMs maximum per board. Two blades/boards per CPA. One or 2
CPAs installed per controller.
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide
SAS / ENC high performance OUT connector
Power cord receptacle
Power Supply - 220 VAC input, draws approximately 265 watts.
Power Supply Ready 1 LED - Lights when 12 VDC power #1 is ready.
Power Supply Ready 2 LED - Lights when 12 VDC power #2 is ready.
Power Supply alarm LED - Lights when power supply has an error.
Table 11 Cache capacities per controller
Capacity of cache
memory module
16 GB
32 GB
16 GB
32 GB
Introduction
Description
Maximum cache capacity configurable based on
the number of cache path control adapter pairs
included:
1 cache path control
adapter pair (Included
with controller)
256 GB
512 GB
512 GB
1024 GB
2 cache path control
adapter pairs (One
included with
controller and an
additional feature
added)
512 GB
1024 GB
1024 GB
2048 GB
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