Setting The Host Mode And Host Group Mode For The Disk Array Ports; Setting System Option Modes - HP StorageWorks P9000 Configuration Manual

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
P9000 disk arrays, one for the Primary disks and one for the Mirror disks.
This process is also called "LUN mapping."
In Remote Web Console, 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)
In Command View Advanced Edition, LUN mapping includes:
Configuring ports
Creating storage groups
Mapping volumes and WWN/host access permissions to the storage groups
For details, see HP StorageWorks P9000 Provisioning for Open Systems User Guide.
Record the LUNS and their ports, WWNs, nicknames, and LDEVs. This information will be used
later to verify host and device configuration.

Setting the host mode and host group mode for the disk array ports

After the disk array is installed, you must set the host mode for each host group that is configured
on a disk array port to match the host OS. Set the host mode using LUN Manager in Remote Web
Console or Command View Advanced Edition. If these are not available, the HP service
representative can set the host mode using the SVP. The host mode for NonStop is 0C or 2C. Use
host mode 2C if you plan to use LUN size expansion (LUSE).
CAUTION:
to NonStop hosts. Do not select a mode other than 0C or 2C for NonStop. Changing a host mode
after the host has been connected is disruptive and requires the server to be rebooted.
When a new host group is added, additional host group modes (options) can be configured. The
storage administrator must verify if an additional host group mode is required for the host group.
CAUTION:
configured is disruptive and requires the server to be rebooted.

Setting system option modes

The HP service representative sets system option modes based on the operating system and software
configuration of the host. In some situations, the system option modes shown in
(page 50) enable storage system behaviors that are more compatible with the requirements of a
NonStop system than the default modes. Ask your service representative if these modes apply in
your situation.
The correct host mode must be set for all new installations (newly connected ports)
Changing host group modes for ports where servers are already installed and
Table 2
Installing and configuring the disk array 49