Product manual

Chapter 4: Management with WebPAM PROe
67
• 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
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. In Management View, click the Background Activities tab and select one of
the following from the dropdown menu.
• Media Patrol – See “Running Media Patrol” on page 68
• Rebuild – See “Rebuilding a Disk Array” on page 130
• PDM – See “Running PDM” on page 68
• Transition – See “Transitioning a Disk Array” on page 132
• Initialization – See “Initializing a Logical Drive” on page 137
• Redundancy Check – See “Running Redundancy Check” on page 137
3. In the next screen, make the choices as requested.
4. Click the Start button.