5
Preface
Extensions and conversions
SAS/RAID adapters
In addition to the six standard PCI slots, a dedicated PCI slot is reserved for the
ServerRAID-8i RoMB adapter (controller).
By default, the base unit has a ServeRAID-8i adapter installed to handle up to
six hard disk drives. This adapter works in conjunction with the onboard SAS
controller.
In the extension unit, a ServeRAID-8i adapter is optionally available. However,
in a multi-node configuration, a maximum of two adapters is allowed to handle
up to 12 hard disk drives.
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In a 16-way configuration, a ServeRAID-8i adapter is installed in both
base units. Consequently, no more optional adapters are allowed for any
of the two extension units.
ServeRAID-8i upgrade is described in
chapter “Adapters” on page 41
.
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An BBU (Battery Backup Unit) is integrated in the ServeRAID-8-i adapter
to protect its memory contents in the event of a power failure. Lithium
battery exchange is described in the Service Supplement.
