Bull NovaScale R422-E1, Installation And User Manual

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ovaS
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ale R422-E1/R422-INF-E1 Installation and User's Guide
1-4 1U Twin: System Notes
As a 1U Twin confi guration, the NovaScale R422-E1/R422-INF-E1 is a unique
server system. With two system boards incorporated into a single chassis, there
are several points you should keep in mind.
System Power
A single power supply is used to provide the power for both serverboards. Each
serverboard however, can be shut down independently of the other with the power
button on its own control panel.
Although they share a common power supply, the I
2
C signals used for power supply
monitoring are received by the primary serverboard only. (When viewed from the
front of the chassis, the serverboard on the left is referred to as the primary board
and the serverboard on the right as the secondary.)
SATA Backplane/Drives
As a system, the NovaScale R422-E1/R422-INF-E1 supports the use of four SATA
drives. The SATA backplane works as a single backplane divided into two sec-
tions. This means that while a single power connector is used and functions such
as overheating apply to both sections together, each pair of SATA drives is logically
connected to its own serverboard. Consequently, RAID setup is limited to a two-drive
scheme (RAID cannot be spread across all four drives).