Managing HP Serviceguard for Linux, Tenth Edition, September 2012

Sample Disk Configurations
Figure 5 shows a two node cluster. Each node has one root disk which is mirrored and
one package for which it is the primary node. Resources have been allocated to each
node so that each node can adopt the package from the other node. Each package has
one disk volume group assigned to it and the logical volumes in that volume group are
mirrored.
Figure 5 Mirrored Disks Connected for High Availability
Redundant Power Supplies
You can extend the availability of your hardware by providing battery backup to your
nodes and disks. HP-supported uninterruptible power supplies (UPS) can provide this
protection from momentary power loss.
Disks should be attached to power circuits in such a way that disk array copies are
attached to different power sources. The boot disk should be powered from the same
circuit as its corresponding node. Quorum server systems should be powered separately
from cluster nodes. Your HP representative can provide more details about the layout of
power supplies, disks, and LAN hardware for clusters.
Redundant Power Supplies 31