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FatTwin: System Notes
As a FatTwin confi guration, the FatTwin F617R2-FT/F73 is a unique server system.
With eight system boards incorporated into a single chassis acting as eight separate
nodes, there are several points you should keep in mind.
Nodes
Each of the eight 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 the chassis. The
nodes are connected to the server backplane by means of an adapter card.
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 1620 Watt power supplies are used to provide the power for all serverboards.
Each serverboard however, can be shut down independently of the others with the
power button on its own control panel.
SATA Backplane/Drives
As a system, the FatTwin F617R2-FT/F73 supports the use of two (2) SAS/SATA
HDD's in front-mounted hot-swap drive trays per node for a total of sixteen (16) HDD
drives in the system. Each of the eight backplanes works to apply system-based
control for power and fan speed functions, yet at the same time logically connects
a set of two SAS/SATA drives to each backplane/serverboard. Consequently, RAID
setup is limited to a two-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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