External Components; Front Panel Components - Silicon Graphics Origin 3900 User Manual

11: D-brick2

External Components

Front Panel Components

162
The modular design of the D-brick2 expands easily to meet your mass storage needs. It
has the following features:
• Maximum configuration of up to 96 drives (six D-brick2 units)
• 1x16 (more storage) and 2x8 (more bandwidth) disk topologies in each brick
• Dual power feeds with dual power supplies
• Redundant cooling
• Non-disruptive component replacement
• Enclosure services interface (ESI) for SCSI enclosure services (SES)
Each D-brick2 is connected to one or more Fibre Channel boards (host bus adapters, or
HBAs) in the Origin 3900 server, either separately or in a combination (loop).
Note: The standard configuration for the D-Brick2 is 1 x 16. The D-brick2 can be
reconfigured to 2 x 8 on site.
This section describes the external components located on the front and rear panels of the
D-brick2.
The front of the D-brick2 consists of drive carrier modules or dummy drive modules (see
Figure 11-1). The disk drive carrier module consists of a hard disk drive mounted in a
die-cast aluminum carrier (see Figure 11-2). The carrier protects the disk drive from radio
frequency interference, electromagnetic induction, and physical damage. It also provides
a means for thermal conduction.
Dummy drive carrier modules must be installed in all unused drive bays. Figure 11-2
provides an illustration of this module.
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