User manual

Chapter 5: Management with WebPAM PRO
137
• 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 – This function applies to conditions when an array goes
Critical but no spare drive is present. When enabled, the disk array will
begin to rebuild as soon as you replace the failed physical drive with an
unconfigured physical drive of equal or greater size.
For conditions when an array goes Critical and a spare drive of
adequate size is present, a rebuild begins automatically. This is a
separate function and always enabled.
6. Click the Submit button to save your settings.