Chapter 5: Management with WebPAM PRO
•PDM – Predictive Data Migration
•Synchronization
•Redundancy Check
•Migration
•Transition
•Initialization
•Media Patrol
Making Background Activity Settings
To make settings for background activities:
1.In Tree View, click the Subsystem 
icon.
2.From the dropdown menu on the Background Activities tab, choose Settings.
3.Click the dropdown menu to choose a priority of Low, Medium, or High for the following functions:
•Rebuild – Rebuilds the data from a failed drive in a disk array
•Synchronization – Checks the data integrity on disk arrays
•Initialization – Sets all data bits in the logical drive to zero
•Redundancy Check – Checks, reports and can correct data inconsistencies in logical drives
•Migration – Change RAID level or add physical dries to disk arrays
•PDM – Looks for bad blocks the physical drives of disk arrays
•Transition – Returns a revertible spare drive to spare status
The rates are defined as follows:
•Low – Fewer resources to activity, more to data read/write.
•Medium – Balance of resources to activity and data read/write.
•High – More resources to activity, fewer to data read/write.
4.Highlight the following PDM trigger settings and type a value into the corresponding field:
•Reassigned Block Threshold – 1 to 512 blocks
•Error Block Threshold – 1 to 1024 blocks
5.Check to enable or uncheck to disable the following functions:
•Media Patrol – Checks the magnetic media on physical drives
•Auto Rebuild – If there is a spare drive of adequate capacity, a critical disk array will begin to rebuild automatically. If not spare drive is available, the disk array will begin to rebuild as soon as you replace the
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