Managing HP Serviceguard for Linux, Seventh Edition, July 2007

Planning and Documenting an HA Cluster
Hardware Planning
Chapter 4 95
Shared Storage
SCSI may be used for up to four node clusters, or FibreChannel can be
used for clusters of up to 16 nodes.
Smart Array Cluster Storage
Smart Array cluster storage is limited to the following:
• two node cluster with MSA 500 and four node with MSA 500 G2
• the Smart Array built in interfaces or HBAs that are supported with
either the MSA 500 or MSA500 G2
Check the MSA storage documentation for drive and LUN configurations
that would best suit your application.
NOTE The MSA storage and Smart Array host adapters automatically set the
SCSI addresses. As a result, no user interaction is required to change or
modify any of these settings.
FibreChannel
FibreChannel cards can be used to connect up to 16 nodes to a disk array
containing storage. After installation of the cards and the appropriate
driver, the LUNs configured on the storage unit are presented to the
operating system as device files, which can be used to build LVM volume
groups.
NOTE Multipath capabilities are supported by FibreChannel HBA device
drivers. Check with the storage device documentation for details. See
also “Multipath for Storage” on page 96.
On the worksheet, enter the names of the device files that correspond to
each LUN for the Fibre-Channel-attached storage unit.