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Chapter 2: System controller
The storage systems are equipped with dual controllers for communicating with a data
host.
Each controller includes the following internal components such as a processor, dual in-
line cache memory modules (DIMMs), cache flash memory (CFM), battery, and fans. The
controller has an Ethernet connection for out-of-band management using Hitachi Device
Manager - Storage Navigator. If the data path through one controller fails, all drives
remain available to data hosts using a redundant data path through the other controller.
The controller is equipped with LED indicators for monitoring its operating conditions
and notifying possible component replacement.
CBL controller chassis
The controller chassis houses controllers, backup fan modules, and power supplies. The
chassis also includes specific functional LEDs located on the front and rear of controller
to provide its operating status.
The following table lists the controller board specifications.
Chassis (4U)
Controller board
Number of DIMM slot
Cache memory capacity
Data encryption
CBL controller front panel bezel LEDs
The following table describes the definitions of the CBL controller front panel bezel LEDs.
Hitachi Virtual Storage Platform G900 Hardware Reference Guide
Component
Chapter 2: System controller
VSP G900
DW850-CBL
DW-F850-CTLH
8
128 GiB to 512 GiB
N/A
15
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