User Guide

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Failing
component
Continue after
failure? What happens and how to recover
Disk module Yes With RAID of any level supported by MPE/iX, applications
continue running. System Administrator or service provider
replaces module.
Provides the same features as the basic configuration, but
with better performance and higher availability. With RAID of
any supported level, applications can continue to run after the
failure of a single disk module.
SP No If one SP fails, the System Administrator must reassign
ownership of the failed SP’s LUNs to the operational SP by
using Grid Manager. Also, the path to the operational SP must
be used and can be changed by using SYSGEN or ioconfig.
Once these changes have been made, access to all LUNs on
the array within the SCSI LUN limits is possible.
Fan pack Yes Applications continue running. System Administrator or
service provider replaces module.
Power supply Yes If a redundant power supply module is present, applications
continue running; otherwise, disk array fails. Service provider
replaces power supply. The System Administrator restarts the
operating system if necessary.
SCSI-2 adapter/
cable
No* If the adapter/cable fails, I/O operations to array disk units fail.
Authorized service provider replaces adapter or cable and
System Administrator restarts operating system and
applications. If the SCSI-2 adapter fails, no I/O operations are
possible between the host and the array.