SuperTrak EX Series User Manual
failed physical drive with an unconfigured physical drive of equal or greater size.
6.Click the Submit button to save your settings.
Running Background Activities
To run a background activity from the Background Activities tab:
1.In Tree View, click the Subsystem 
icon.
2.From the dropdown menu on the Background Activities tab, choose one of the following activities:
•Media Patrol – See “Running Media Patrol” on page 110
•Rebuild – See “Rebuilding a Disk Array” on page 139
•PDM – See “Running PDM” on page 110
•Transition – See “Transitioning a Disk Array” on page 141
•Initialization – See “Initializing a Logical Drive” on page 146
•Redundancy Check – See “Running Redundancy Check” on page 147
3.In the next screen, make the choices as requested.
4.Click the Start button.
Running Media Patrol
Media Patrol checks the magnetic media on physical drives. When it finds the specified number of bad blocks, it will trigger PDM. See “Making Background Activity Settings” on page 109 and “Running PDM” on page 110.
You can schedule Media Patrol to run automatically, see “Scheduling an Activity” on page 111.
To run Media Patrol:
1.In Tree View, click the Subsystem 
icon.
2.From the dropdown menu on the Background Activities tab, choose Start Media Patrol.
3.In the next screen, click the Start button.
Running PDM
Predictive Data Migration (PDM) migrates data from the suspect physical drive to a spare disk drive, similar to Rebuilding. But unlike Rebuilding, PDM acts before the disk drive fails and your Logical Drive goes Critical.
You an also run PDM on a specific disk array, see “Running PDM on a Disk Array” on page 140.
110
