Fujitsu Siemens Computers SX series User Manual page 317

Dynamic Reconfiguration
Further information on BS2000
During DR CPUs are attached and detached automatically and implicitly provided the
existing licenses permit this.
CPUs which are licensed in BS2000 but are located on XSBs which are not attached at
a point in time are nevertheless reported by X2000 and displayed in BS2000 with the
DET(EX)/OFF status. This applies both for normal and "extra" CPUs.
Explicit attachment of these CPUs is rejected with the message
ETMRK30 CPU (&00) UNEXPECTED CONFIGURATION STATE: FOREIGN
until an XSB is attached using DR.
After DR-connect "normal" CPUs are implicitly attached in BS2000.
"Extra" CPUs must be attached explicitly using the following command (see
"Commands, Volumes 1 -
/ATTACH-DEVICE UNIT=*EXTRA-CPU(...)
Before DR-disconnect it may be necessary to detach the "extra" CPUs employed
explicitly with the following command:
/DETACH-DEVICE UNIT=*EXTRA-CPU(*ALL)
Otherwise BS2000 rejects the DR request with the console message ETMDR05.
Attached memory is automatically put into operation as main memory in the accor-
dance with the system limit for the model series and cannot be released again in
ongoing operation. DR-disconnect is rejected, the memory can be released again
through a reboot.
Channel devices connected via UHPS (Universal Hot-Plug System) are not activated
automatically while operation is in progress but only when a reboot takes place.
DR-disconnect is rejected for channel devices connected via UHPS which have been put
into operation; they are released again only when a reboot takes place.
BS2000 devices (disks) are generally configured as multipath devices using both
system boards, which means that after DR at least one path remains for each device.
PowerPath automatically switches to the remaining paths.
Tape devices connected via FC can always only be reached via one path. The archive
system which monitors them (e.g. CentricStor) should be connected on a multipath
basis via both system boards by attaching subsets of the devices via different paths. As
a result all tape devices are accessible after Dynamic Reconfiguration provided there is
a path open to the archive system.
U41272-J-Z385-3-76
5" [11]):
Performing DR
317