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Chapter 5: Management with WebPAM PRO

109

• 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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Promise Technology EX4650 Manual do Utilizador Página 121