HP 3PAR Cluster Extension Software Administrator Guide (5697-1429, March 2012)

Depending on the resource group and resource property values, the resource tries to start on
different nodes several times. If the remote data center is down, this would look like the resource
group is alternating between the surviving systems. This happens until the previously mentioned
resource and resource group property values are reached or you disable the restarting of the
resource. This could be also the case if the ApplicationStartup resource property has been set to
FASTFAILBACK. If a 3PAR storage system state has been discovered that does not allow bringing
the resource group online on any system in the cluster, a cluster error would be reported and the
resource would fail on all systems. This could lead to the same behavior as described for a HP
3PAR Cluster Extension data center error.
Failing physical disk resources during online attempt of the resource group
When resource groups that use HP 3PAR Cluster Extension to failover Remote Copy volume group
are brought online, physical disk resources may fail due to the following reasons:
• The physical disk resource does not have a dependency on its HP 3PAR Cluster Extension
resources/packages configured. Review the setup steps for HP 3PAR Cluster Extension
resources.
• The fibre channel path or connectivity between the servers and the storage systems may be
broken. So user has to review the FC connectivity between the servers and the storage systems.
Cannot connect to HP 3PAR storage system
During HP 3PAR Cluster Extension configuration, if you are unable to connect to the 3PAR storage
system, ensure that the storage system is up and running, and the network ports are functioning
properly. To check for response from the storage system over the network, use the ping command
from cluster nodes to the storage system's network name or IP address.
ping <storage system network name or IP address>
If you are using storage system network name, verify it is resolving to proper IP address using
nslookup command from the cluster nodes.
nslookup <storage system network name>
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.
80 Troubleshooting