Chapter
2:
System controllers
The storage systems are equipped with multiple 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.
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 specific functional LEDs located on the front and rear of
controller to provide its operating status.
The following table lists the controller board specifications.
Component
Description
Chassis (2U)
DW800-CBSS
Controller board
DW-F850-CTLS
DW-F850-CTLSE
Number of DIMM slot
2 per controller board
Cache memory DIMM
capacity
16 GiB (VSP F350
32 GiB (VSP F370)
Total cache memory DIMM
capacity
64 GiB (per VSP F350
controller
128 GiB (per VSP F370
controller)
128 GiB (VSP F350 system)
256 GiB (VSP F370 system)
Data encryption
Not supported
Supported
Chapter 2: System controllers
Hitachi Virtual Storage Platform F350, F370 Hardware Reference Guide
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