HP Surestore Disk Array 12h - And FC60, Advanced User'S Manual, Page: 127 / 466

Topologies for HP-UX
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Table 12
Campus 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
module 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 Applications continue to run when one power supply modules 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
pair of hubs I/O operations fail along the path to the failed HP Fibre Channel-AL
Hub. I/O operations can transfer automatically to the other pair of
cascaded
HP Fibre Channel-AL Hubs 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.