HP Surestore Disk Array 12h - And FC60 Advanced User's Manual page 113

Table 9
Single-System Distance 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
HP Fibre No
Channel-AL
Hub
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
failed 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.
No I/O operations are possible between the host and any disk
arrays because all I/O traffic is routed through the HP Fibre
Channel-AL Hub. The authorized service provider replaces the
failed HP Fibre Channel-AL Hub and the system administrator
restarts the operating system and applications.
Topologies for HP-UX
113