QuickSpecs

Accidental disconnect of a single-PDU power cord
Accidental disconnect of up to four system power cords
30 amp Power Distribution Unit
30 amp Power Distribution Unit30 amp Power Distribution Unit
30 amp Power Distribution Unit
252663-D74 (NA/JPN) and 252663-B33 (International)-supported on 10K G2 rack
E7681A (NA/JPN) and E7682A (International)-supported on Rack System E
A 30 amp Power Distribution Unit (PDU) is also supported with HP Integrity rx8640 Server. This PDU is
sold separately and can be ordered with any HP Server solution.
The following configuration guidelines apply when using the 30-amp PDU:
HP Integrity rx8640 Server plugs A0 and A1 should be plugged into the same PDU
Ax and Bx cords should never be plugged into the same PDU
Use two 30-amp PDUs to achieve input power redundancy. A0/A1 and B0/B1 into separate
PDUs.
Ordering tools will not force the purchase of a second PDU for input power redundancy. A second
PDU must be manually selected if redundant input power is desired.
Partitioning
PartitioningPartitioning
Partitioning A hardware partition corresponds roughly to a single, standalone system. The HP Integrity rx8640 Server
can be subdivided into four partitions, each containing one or more cells that communicates coherently
over a high bandwidth, low latency crossbar fabric. Special programmable hardware in the cells defines
the boundaries of a partition in such a way that the isolation is enforced from the actions of other
partitions. Each partition runs its own independent instance of the operating system (HP-UX 11i v2,
Windows 2003 Data Center Edition, Windows 2003 Enterprise Edition Linux, or OpenVMS). Applications
cannot span partitions since each partition runs its own instance of the OS, essentially functioning as a
stand alone server. However, different partitions may be executing the same or different revisions of an
operating system, or they may be executing different operating systems altogether (such as HP-UX 11i v2,
Windows 2003 Data Center Edition, Windows 2003 Enterprise Edition, Linux, or OpenVMS), with OS
availability.
Each partition has its own independent processors, memory and I/O resources consisting of the resources
of the cells that make up the partition. Resources may be removed from one partition and added to
another without having to physically manipulate the hardware just by using commands that are part of the
System Management interface. With future releases of HP-UX and Windows, using the related capabilities
of dynamic reconfiguration (e.g. on line addition, on line removal), new resources may be added to a
partition and failed modules may be removed and replaced while the partition continues in operation.
Partitioning the resources of the complex in this way makes it easy to run multiple applications on the
same physical system; you can allocate physical resources and tune the operating system running on each
partition depending on the needs of the application (or the most important application) you intend to run
on it. Alternatively, you can configure the HP Integrity rx8640 Server as a single partition, allowing all the
resources to be focused on a single set of tasks, for example a large online transaction processing
application.
You can increase or reduce the processing power of a partition by adding or deleting cells. With the
rx8640, you must shut down the operating system running on the affected partition(s) before moving cells,
and before making configuration changes that will take effect. Though the OS may include commands for
some configuration tasks, HP recommends you use the Partition Manager (parmgr) to configure
partitions.
Hardware based partition configuration changes may require a reboot of the partition depending upon
QuickSpecs
HP Integrity rx8640 Server
HP Integrity rx8640 ServerHP Integrity rx8640 Server
HP Integrity rx8640 Server
Configuration
DA - 12471 Worldwide — Version 14 — November 8, 2007 Page 22