Hitachi Virtual Storage Platform G370 - Page 14

Chapter 2: System controllers
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 ash 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.
Controller chassis with small form-factor drive bays (CBSS)
The CBSS controller chassis houses controllers, backup fan modules, power supplies,
and provides twenty-four slots at the front for loading large form-factor (2.5-inch) data
drives. The chassis also includes specic functional LEDs located on the front and rear of
controller to provide its operating status.
The following table lists the controller board specications.
Component Description
Chassis (2U) DW800-CBSS
Controller board DW-F850-CTLS DW-F850-CTLSE
Number of DIMM slot 2
Cache memory capacity 32 GiB to 64 GiB
Data encryption Not supported Supported
CBSS controller chassis with front panel bezel
The following table lists the denitions of the CBSS controller chassis front panel bezel
LEDs.
Chapter 2: System controllers
Hitachi Virtual Storage Platform G350, G370 Hardware Reference Guide 14