Hitachi E590 - Hitachi Virtual Storage Platform Hardware Overview; Controller Chassis Components and LEDs

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 Item Description
1 LED (POWER, READY, WARNING,
ALARM)
Status LEDs for the controller
chassis.
2 POWER ON/OFF (main switch) Switch that controls power to the
storage system.
3 Lock Use to lock and unlock front bezel.
Chapter 2: Hardware overview
Hitachi Virtual Storage Platform E590 and E790 Hardware Reference Guide 11