Disadvantages of remote loadsource disk unit mirroring for primary
partitions on an IBM® iSeries™ server
- A system that uses remote loadsource disk unit mirroring is only able
to perform an IPL from the disk unit attached to the load source IOP. If that
disk unit fails and cannot be repaired concurrently, the system cannot perform
an IPL until the failed load source is fixed and the recover remote loadsource
service procedure is performed.
- When remote loadsource disk unit mirroring is active on a system and the
load source attached to the Load Source IOP fails, the system cannot perform
a main storage dump if the system ends abnormally. This means that the system
cannot use the main storage dump to reduce recovery time after a system fails.
It also means that the main storage dump is not available to diagnose the
problem that caused the system to end abnormally.