Product manual

Chapter 4: Management with WebPAM PROe
97
See “Migrating a Logical Drive’s RAID Level” on page 139 and “RAID Level
Migration” on page 275.
Making Migration Settings
To make migration settings:
1. Click the AdminTool tab.
2. Click the Background Activities icon.
The list of background activities appears.
3. Click the Settings button.
4. Click the Migration Rate dropdown menu and choose a rate:
• Low – Fewer system resources to Migration, more to data read/write
operations.
• Medium – Balances system resources between Migration and data
read/write operations.
• High – More system resources to Migration, fewer to data read/write
operations.
5. Click the Confirm button.
PDM
Predictive Data Migration (PDM) is the migration of data from the suspect disk
drive to a spare disk drive, similar to rebuilding a logical drive. But unlike
Rebuilding, PDM constantly monitors your disk drives and automatically copies
your data to a spare disk drive BEFORE the disk drive fails and your logical drive
goes Critical.
See “Running PDM on a Disk Array” on page 129 and “PDM” on page 259.
Making PDM Settings
To make PDM settings:
1. Click the AdminTool tab.
2. Click the Background Activities icon.
The list of background activities appears.
3. Click the Settings button.
4. Make the following settings are required:
• Click the PDM Rate dropdown menu and choose a rate:
• Low – Fewer system resources to PDM, more to data read/write
operations.
• Medium – Balances system resources between PDM and data
read/write operations.