Important: To ensure correct airflow and cooling, all PSU bays and cooling module bays must contain a
functioning unit. If the enclosure is run with a single SBB I/O module, the other I/O module bay must
be filled with a blank module. Each row of drive bays must be completely empty or completely full.
Enclosure Chassis
The chassis consists of a sheet metal enclosure assembly with an integrated midplane PCB, module
runner system, and two drawers for drive modules.
The chassis has a 19 inch rack mounting that enables it to be installed on to standard 19 inch racks and
uses 5 EIA units of rack space (8.75 inches; 222mm).
Each drawer contains 42 bays for Disk Drives in Carriers (DDICs). DDICs are top-mounted into the
drawers.
At the rear, the chassis assembly can accept two PSUs, two SBB I/O modules and five cooling modules.
Drawers
Each drawer contains 42 slots, each of which accepts a single DDIC containing a 3.5” drive or a 2.5" drive
with an adapter..
Opening a drawer does not interrupt the functioning of the system, and DDICs can be hotswapped while
the enclosure continues to operate. However, drawers must not be left open for longer than 10 minutes,
otherwise airflow and cooling will be compromised.
The drawer is designed to support its own weight, plus the weight of any drives, when fully open.
The following safety features are included:
v To reduce the possibility of toppling, only one drawer can be open at any one time.
Figure 7. Module locations
Chapter 2. System overview 11
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