User guide

1–12 Introduction
Hitachi Unified Storage VM Block Module Hardware User Guide
The rear panel of a DBX high-density drive box includes two redundant
power supplies, two ENC-IN ports, and two ENC-OUT ports for each section
inthe drive box. The ports provide the connections to daisy-chain high-
density expansion units in the system. The rear panel also includes LEDs
that show the status of the ENC units and the power supplies. The following
illustration shows the hardware components on the rear panel of a high-
density expansion unit.
Figure 1-9: DBX (dense) drive box front bezel and front panel
Item Description Item Description
1 Unit A Status LEDs 2 Lock
3 Unit B Status LEDs