Auto Performance Protection And The Vsa; Auto Performance Protection And Other Clusters - HP StorageWorks P4000 User Manual

the storage system is quarantined in the cluster. While the storage system is quarantined it does
not participate in I/O, which should relieve the performance degradation.
After the operations return to normal (in 10 minutes), the storage system is returned to active duty
and resynced with the data that has changed since its quarantine. Volumes that depend on this
storage system will then show "Resyncing" on the volume Details tab.
• Storage Server Inoperable. The Inoperable status indicates that the storage system is unable to
repair the slow I/Os, which may indicate a potential hardware problem. Volumes that depend
on this storage system are unavailable. For information about how to determine volume availability,
see the section
Rebooting the storage system may return the status to Normal.

Auto Performance Protection and the VSA

The VSA will not report the Overloaded status, because there is no way to determine what may be
affecting I/O on the underlying hardware. However, the VSA can accurately report when I/Os are
not completing, and can return the Inoperable status.

Auto Performance Protection and other clusters

Auto Performance Protection operating on a storage system in one cluster will not affect performance
for other clusters in the management group.
Checking storage system status
You can easily identify whether Auto Performance Protection is active on a storage system in a cluster
with performance issues.
1. Select the affected storage system in the navigation window.
The storage system icon will be blinking in the navigation tree.
"Determining volume and snapshot availability" on page 49.
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