Fujitsu Siemens Computers SX series User Manual page 286

Functional scope, concepts and applications
The benefits of extended partitioning (XPAR) compared to physical partitioning (PPAR,
based on the physical system board mode (PSB mode)) are as follows:
Greater flexibility
The smaller hardware granularity means that greater flexibility is achieved on the SX150
servers in the event of changing utilization of the hardware resources by the partitions.
Higher availability
If a hardware component fails a larger porportion of the hardware resources remains
operational.
This chapter describes the implementation and the application options of DR for the
BS2000 partitions of SX150 servers.
If more than one partition is used on an SX150 server, dependencies can arise in the DR
scenarios regardless of the type of partition (BS2000 or Solaris partition). These must be
clarified and taken into account in each particular case.
The requirements which must be met for a Solaris partition with DR capability are not dealt
with in detail here. Information on this is contained in the manual
Reconfiguration" [25]. In the description below Solaris partitions with DR capability are
always assumed.
Functions
The following functions are available in BS2000 partitions for performing Dynamic Recon-
figuration:
DR-connect
Connection of an XSB with implicit attachment (ATTACH) of the CPUs, the memory and
the I/O devices in BS2000/VM2000.
DR-connect is only accepted for an XSB which is assigned either to the home partition
or the pool of free XSBs.
CPUs are attached in accordance with the existing licenses, and memory according to
the limit set for the BS2000 memory.
Caution: It is, however, not possible to guarantee that all the memory added is available
for BS2000. This is only certainly the case after Solaris has been rebooted.
A UHPS is not made available if the XSB to which it is connected is added to the
partition using DR-connect. The UHPS can only be used after the next reboot.
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Dynamic Reconfiguration
"Dynamic
U41272-J-Z385-3-76