HP 3PAR Cluster Extension Software Administrator Guide (5697-0925, May 2011)

Resource disk failure when HP 3PAR Cluster Extension is online
In a cluster resource group, if the Cluster Extension resource is online but dependent disk resource
is failing:
• Ensure that the fibre channel connectivity between the servers and the storage systems is up
and running.
• Verify that the disk resource is dependent to the Cluster Extension resource.
• Ensure that the Remote Copy volume group managed by the Cluster Extension resource contains
the virtual volume which is correctly mapped to the configured disk resource.
• On a cluster node where the Cluster Extension resource is online, ensure that the presented
virtual volume is having read/write access on the HP 3PAR storage system.
• Using HP 3PAR Management GUI, verify that the virtual volume is having read/write access
on HP 3PAR storage system where Cluster Extension resource is online.
• Rescan disks using Disk Management.
Cluster Extension and HP 3PAR Command Line (CLI) Install/Upgrade
While installing or upgrading HP 3PAR Command Line Interface (CLI) on Windows, the environment
variable Path will be updated with the CLI install directory. Occasionally, this change does not
take effect and you may have to re-login to Windows. HP recommends that you test the CLI
commands after you install or upgrade HP 3PAR CLI and try to re-login, if the commands fail due
to the binary not found error.
Change of HP 3PAR storage system IP or password file
If there is change in the configured HP 3PAR storage system's IP address in the Cluster Extension
configuration or if the configured password file is missing or corrupt, Cluster Extension will fail to
communicate with the storage system and cannot perform any Cluster Extension failover operations.
You can use the Connection Test option of HP 3PAR Cluster Extension configuration tool to verify
connectivity of configured storage systems. To change HP 3PAR storage systems settings, use the
Modify option in the HP 3PAR Cluster Extension configuration tool and save the configuration file
on all cluster nodes.
MNS needs its own resource monitor
The MNS quorum is a regular cluster resource that is monitored by the cluster resource monitor
(ResrcMon.exe). To avoid cluster failures because of other hanging resources, HP recommends
that the MNS resource run in its own resource monitor process. This can be changed by selecting
the MNS quorum resource in the Cluster Administrator GUI. Right-click and select Properties from
the menu or double-click the MNS resource and select the box next to Run this resource in a separate
Resource Monitor, and then click OK.
Host persona settings
Host personas are a set of behaviors that permit hosts connected to FC or iSCSI ports on the HP
3PAR storage system to deviate from the default host behavior. By assigning a persona to a host,
multiple host types that require distinct customized responses can share a HP 3PAR storage system
port. For example, hosts running Windows, Linux, and AIX operating systems can all connect to
the same HP 3PAR storage system port.
You can set the host persona number when the host is created or modify it later. To display, create,
modify, and remove host personas, use the HP 3PAR CLI commands or the HP 3PAR Management
Console. For instructions on displaying, creating, modifying, and removing host personas, see the
HP 3PAR InForm CLI Administrator’s Manual or the HP 3PAR InForm Management Console Online
Help
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