drives. Each drive unit contains two redundant power supplies and two
ENC adapter boards that are used to connect the tray to the controller.
The connection to the controller may be direct via ENC cable or via a
daisy-chain connection through the ENC adapters in other drive trays See
Figure 1-13 DBX (dense) drive tray front bezel on page 1-13 and Figure
1-15 DBX (dense) drive tray rear panel on page 1-14.
• DB60 - a “high-density” 5U high tray containing up to 60 vertically
mounted 2-1/2-inch (SFF) drives. This drive tray is functionally divided
into two separate drive units (A and B), each containing a maximum of 30
drives. Each drive unit contains two redundant power supplies and two
ENC adapter boards that are used to connect the tray to the controller.
The connection to the controller may be direct via ENC cable or via a
daisy-chain connection through the ENC adapters in other drive trays See
Figure 1-13 DBX (dense) drive tray front bezel on page 1-13 and Figure
1-15 DBX (dense) drive tray rear panel on page 1-14.
DBS and DBL drive trays
The illustrations on this page and the next page show the front and rear
panels of the DBL and DBS drive trays. The tables following the illustrations
describe the main features of each panel.
Figure 1-6 DBL, DBS, and DBF drive tray front bezel
Figure 1-7 DBL drive tray front view
1-8
Introduction
Hitachi Unified Storage VM Block Module Hardware User Guide
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