Advanced SSA Optical Extender (Pair) Feature
The Advanced SSA Optical Extender (Pair) feature permits 7133 Models D40 and T40
to be connected to SSA attachments or other devices (for example, other 7133s)
through pairs of fibre optic cables. Each end of a pair of fibre optic cables is connected
to a Advanced SSA Optical Extender. The Advanced SSA Optical Extender can be
plugged into the SSA connector of a device or SSA attachment (for example, an SSA
adapter).
The maximum permitted length for a fibre optic cable that connects two SSA nodes (for
example, disk drives) is 10 kilometers (32800 feet).
See “Advanced SSA Optical Extenders and Fibre Optic Cables” on page 22 for more
details.
Remote Power On Control Feature
The Remote Power On Control feature permits the using system to control the electrical
power in 7133 Models D40 and T40. The feature consists of a control unit, a cable that
connects the control unit to the 7133, and cables that connect the control unit to the
using system. See also “Remote-Power-On Control Unit and Cables” on page 21.
−48 Volt Power Supply (Model D40 Only)
The −48 Volt Power Supply feature provides power supply assemblies that allow the
7133 Model D40 to be connected to −48 volt power sources. The 7133 must be
connected to two separate power sources to ensure that operations are not interrupted
if one power source fails. The −48 Volt power distribution panel (PDP) in the rack
provides the power sources and the power cables. For details about how to connect a
7133 Model D40 to a −48 volt power source, see the 7133 Model D40 Serial Disk
System: Installation Guide.
Attention:
Both power supply assemblies in a 7133 must be of the same voltage
rating. Do not mix power supply assemblies of different voltage ratings.
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7133 Models D40 and T40 Service Guide
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