Chapter 2: Hardware Overview; Controller Chassis - Hitachi E590 Hardware Reference Manual

Chapter 2: Hardware overview

The storage system consists of a controller chassis and one or more drive chassis mounted
in a 19-inch rack.

Controller chassis

The controller chassis contains the following components:
Controller boards (CTLs)
■
Front-end modules (FEMs), also called channel boards (CHBs)
■
Power supply (PS)
■
Backup fan module (BKMF)
■
The storage system's CTLs contain the cache memory (CM) and cache flash memory (CFM)
for the storage system. The VSP E590 and VSP E790 supports 768 GiB of cache memory.
Number
1 LED (POWER, READY, WARNING,
ALARM)
2 POWER ON/OFF (main switch)
3 Lock
Hitachi Virtual Storage Platform E590 and E790 Hardware Reference Guide
Item
Chapter 2: Hardware overview
Description
Status LEDs for the controller
chassis.
Switch that controls power to the
storage system.
Use to lock and unlock front bezel.
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