HP Surestore Disk Array 12h - And FC60 Advanced User's Manual page 108

Table 8
Basic Topology Error Recovery
Failing Continue
component after failure
Disk module Yes
Controller No
module in
single-
controller
module array
(no high
availability)
Controller No on path to
module in failed controller
dual module;
controller Yes on alternate
module disk path through
array second
controller
module
Fan module Yes
Power Yes
supply
modules
Fibre No on path to
Channel I/O failed adapter;
adapter Yes if array has
dual controller
modules and
alternate paths
have been
configured
Topologies for HP-UX
108
What happens and how to recover
Applications continue to run on all supported RAID levels (RAID-
1, 0/1, and 5). The system administrator or service provider hot-
swaps the failed disk module.
The disk array fails. The system administrator or service provider
replaces the controller module and the system administrator
restarts the operating system and applications.
Ownership of the failed controller module's LUNs can transfer
automatically to the remaining operational controller module if
primary and alternate paths have been configured in LVM. If so,
LVM switches automatically and transparently to the alternate
path. The system administrator or service provider hot-swaps the
controller module.
Applications continue to run. The system administrator or service
provider hot-swaps the fan module.
Applications continue to run when one power supply module fails.
The system administrator or service provider hot-swaps the failed
power supply module.
I/O operations fail along the path through the failed adapter. If the
host has two Fibre Channel adapters connected to a dual
controller module disk array, the array can be accessed through
the path to the operational adapter and controller module if
primary and alternate paths have been configured in LVM. If so,
LVM switches automatically and transparently to the alternate
path. The authorized service provider replaces the failed adapter
and the system administrator restarts the operating system and
applications.