Product manual

Chapter 4: Management with WebPAM PROe
121
See “Migrating a Logical Drive’s RAID Level” on page 169 and “RAID Level
Migration” on page 347.
Making Migration Settings
To make migration settings:
1. Click the Administration 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
physical drive to a spare drive, similar to rebuilding a logical drive. But unlike
Rebuilding, PDM constantly monitors your physical drives and automatically
copies your data to a spare drive before the physical drive fails and your logical
drive goes Critical.
See “Running PDM on a Disk Array” on page 159 and “PDM” on page 331.
Making PDM Settings
To make PDM settings:
1. Click the Administration 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.