HP StorageWorks XP Disk Array Configuration Guide for NonStop XP24000, XP20000, XP12000, XP10000, XP1024, XP128 (A5951 - 96223, September 2007)

• Do not connect other operating systems to the same XP ports or even use a port that shares a
processor with the same port as NonStop systems.
• Use SAN switches dedicated to NonStop connections, or solutions that have been qualified by
HP. These HP-qualified solutions can include operating systems other than NonStop, but fabric
zoning and LUN security must be used to isolate them from the NonStop systems.
Table 3 Fabric zoning and LUN security settings
LUN SecurityFabric ZoningEnvironment
Must be usedNot requiredSingle node SAN
Must be usedNot requiredMultiple node SAN
Connecting the disk array
The HP service representative connects the disk array to the host by:
1. Verifying operational status of the disk array channel adapters, LDEVs, and paths.
2. Connecting the Fibre Channel cables between the disk array and the fabric switch or host.
3. Verifying the ready status of the disk array and peripherals.
Defining the paths
Use XP Remote Web Console (shown), XP Command View, or XP Command View Advanced Edition
to define paths (LUNs) between hosts and volumes in the disk array.
For non-host mirrored disks, create two identical host groups on two different ports (one port in each
cluster in the array) with identical LUNs in each group.
For host mirrored disks, create two sets of two identical host groups (four total host groups). Configure
one set of two host groups for the Primary (P) path and its backup (B). Assign these two host groups
to two different ports in two different clusters of the disk array, and give each host group access to
separate but identical LUNs. Configure the other set of two host groups for the Mirror (M) and Mirror
Backup (MB) paths. Assign these two host groups to two different ports in two different clusters of the
disk array, and give each host group access to separate but identical LUNs. This arrangement minimizes
the shared components among the four paths, providing both mirroring and greater failure protection.
NOTE:
For the highest level of availability and fault tolerance, HP recommends the use of two XP disk arrays, one
for the Primary disks and one for the Mirror disks.
This process is also called “LUN mapping.”
In XP Remote Web Console and XP Command View, LUN mapping includes:
• Configuring ports
• Enabling LUN security on the ports
• Creating host groups
• Assigning Fibre Channel ServerNet adapter WWNs to host groups
• Mapping volumes (LDEVs) to host groups (by assigning LUNs)
XP Disk Array Configuration Guide for NonStop 17