Switching Primary Controllers; Setting Data Resiliency - HP Surestore Disk Array 12h - And FC60 System Administrator Manual

Using the ARM Command Line Utilities for MPE
Performing Disk Array Maintenance Tasks

Switching Primary Controllers

In dual-controller disk array configurations, the array automatically switches to the secondary controller if
the primary controller fails. However, you can switch controllers manually if necessary. This will cause the
secondary controller to assume the role of primary controller.
To switch primary controllers, type:
arraymgr -c { X | Y } <array-id>

Setting Data Resiliency

The data map contents stored in the disk array controller NVRAM is copied to two disks on the array at
regular intervals to protect against map loss. The interval at which the disks are updated with recovery map
information is controlled using the data resiliency setting. Selecting a data resiliency setting involves
making a tradeoff between data protection and performance. The more frequently the recovery maps are
updated, the more impact it may have on performance.
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