IBM System Storage DS3000, Programming Manual

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This command identifies the drives that are logically grouped together to form the Performance Read
Cache by flashing the indicator lights on the drives in the Performance Read Cache. To turn off the
indicator lights on the drives, use this command:
stop performanceReadCache locate
Suspending and Resuming Performance Read Cache Operation
At times you will need to perform maintenance on the drives in the Performance Read Cache. Such
maintenance might include replacing non-optimal drives or upgrading drives. To perform maintenance
on the Performance Read Cache, you will need to first suspend the operations of the cache. To suspend
operations use this command:
suspend performanceReadCache [performanceReadCacheName]
This command temporarily stops caching for all of the volumes that are using the Performance Read
Cache. While caching is stopped, host reads are serviced from the base volumes instead of from the
Performance Read Cache.
After performing maintenance, you can restart the Performance Read Cache by using this command:
resume performanceReadCache [performanceReadCacheName]
Renaming the Performance Read Cache
If you want to change the name of the Performance Read Cache, you can use this command:
set performanceReadCache [old_performanceReadCacheName] userLabel="new_performanceReadCacheName"
The old Performance Read Cache name must be enclosed in square brackets. The new Performance Read
Cache name, however, must be enclosed in double quotation marks.
Chapter 10. Using the Performance Read Cache premium feature
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