HP Serviceguard Extended Distance Cluster for Linux A.01.01 Release Notes, Third Edition, May 2009

• Using MD, the disk sets are configured such that data written to one disk or disk
set is replicated or mirrored on the other disk or disk set at the other site. As a
result, if one disk set is lost, the data is still accessible from the other disk set. The
data in the other disk set is always current and up-to-date, ensuring no data loss.
• You need to create the Multiple Device (MD) only once at the time of configuration.
From then onwards, you need to only activate or deactivate the device.
• XDC requires that you configure persistent device names using udev prior to
configuring Software RAID.
Compatibility Information and Installation Requirements
To use Extended Distance Cluster, the following hardware and software must be
installed and configured on all nodes.
Hardware Requirements
Following are the hardware requirements that you need for HP Serviceguard Extended
Distance Cluster A.01.01:
Disk Arrays
• HP StorageWorks Modular Storage Array - MSA1000 and MSA1500 families
• HP StorageWorks Enterprise Virtual Array (EVA) family
• HP StorageWorks XP family
Other Hardware
• QLogic Fibre Channel Host Bus Adapters
Software Requirements
Following are the software requirements that you need for HP Serviceguard Extended
Distance Cluster A.01.01:
• HP Serviceguard version A.11.18 or A.11.19 installed on the nodes of the cluster
• Network Time Protocol (NTP) - all nodes in the cluster to point to the same NTP
server
• QLogic Driver - The version number of this driver depends on the version of the
QLogic cards in your environment. Download the appropriate version of the driver
from the following location:
http://www.hp.com -> Software and Driver Downloads
Select the Download drivers and software (and firmware) option. Enter the HBA
name and click >>. If more than one result is displayed, download the appropriate
driver for your operating system.
Compatibility Information and Installation Requirements 9