Modular 2U Sas Expansion Unit - Hitachi AMS 2000 Series Service Manual

Modular 2U SAS expansion unit

The AMS Modular 2U SAS expansion unit contains two redundant power
supplies, two ENC interface units, and from two to 24 SFF disk drives.
Figure 1-17 shows the front (above) and rear (below) views of the AMS
Modular 2U SAS expansion unit.
Figure 1-17: Modular 2U SAS Expansion Unit Front and Rear Views
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Introduction
Hitachi AMS 2000 Family Storage System Service Guide