HP Surestore Disk Array 12h and FC60 - Manual (Page 118)

118 Topologies for HP-UX
Table 10 High Availability Topology Error Recovery
Failing
component Continue
after failure
What happens and how to recover
Disk module Yes 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.
Controller
modules No on path to
failed controller
module;
Yes on
alternate path
through second
controller
module 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 failed
controller module.
Fan module Yes Applications continue to run. The system administrator or service
provider hot-swaps the fan module.
Power supply
modules Yes Availability are present, applications continue to run when one
power supply module fails. The system administrator or service
provider hot-swaps the failed power supply module.
HP Fibre
Channel-AL
Hub No on path to
failed hub;
Yes on
alternate path
to other hub I/O operations fail along the path to the failed HP Fibre Channel-AL
Hub. I/O operations can transfer automatically to the other HP
Fibre Channel-AL Hub 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
hot-swaps the failed HP Fibre Channel-AL Hub.
Fibre
Channel I/O
adapter No on path to
failed adapter;
Yes if array has
dual controller
modules and
alternate paths
have been
configured 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.