Chapter 2: Hardware Overview; Controller Chassis - Hitachi VSP E990 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)
■
Back-end modules (BEMs), also called disk boards (DKBs)
■
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 E990 supports 1,024 GiB of cache memory.
Number
1 LED (POWER, READY, WARNING,
ALARM)
2 POWER ON/OFF (main switch)
3 Lock
Hitachi Virtual Storage Platform E990 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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