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FatTwin: System Notes
As a FatTwin confi guration, the FatTwin F627R2-F73 is a unique server system.
With four system boards incorporated into a single chassis acting as four separate
nodes, there are several points you should keep in mind.
Nodes
Each of the four serverboards act as a separate node in the system. As independant
nodes, each may be powered off and on without affecting the others. In addition,
each node is a hot-swappable unit that may be removed from the front of the chassis.
The nodes are connected to the server backplane from the system's serverboard.
Note: A guide pin is located between the upper and lower nodes on the inner chassis
wall. This guide pin also acts as a "stop" when a node is fully installed. If too much
force is used when inserting a node this pin may break off. Take care to slowly slide
a node in until you hear the "click" of the locking tab seating itself.
System Power
Four 1280 Watt power supplies are used to provide the power for all serverboards.
Each serverboard however, can be shut down independently of the other with the
power button on its own control panel.
SAS/SATA Backplane/Drives
As a system, the FatTwin F627R2-F73 supports the use of thirty-two (32) SAS/
SATA drives. Each of the four backplanes in the system logically connects a set of
eight (8) hot-swap front mounted 2.5" SAS/SATA drives to each node's backplane/
serverboard. Consequently, RAID setup is limited to an eight-drive scheme (RAID
cannot be spread across all drives). See Chapter 6 for the logical hard drive and
node confi guration.
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Chapter 1: Introduction
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