Dell Compellent Series 40 - Manual (Page 240)

232 Storage Center 5.5 System Manager User Guide
System Management
Data Progression
Data Progression is a separately licensed application. To see if your Storage Center
includes Data Progression, click the Help icon at the top of the main window.
Data Progression leverages cost and performance differences between storage tiers,
allowing the maximum use of lower-cost drives for stored data, while maintaining high-
performance drives for frequently-accessed data. Storage Center automatically creates
tiers based on the disks in your system. Tier 1 is fastest, Tier 3 the slowest. To view classes
of tiers on your system, select a disk folder. A list of disk types by tier appears.
Once every 24 hours, Storage Center polls blocks to see if they have been accessed.
Blocks of data are then migrated up or down depending on use. The amount of time the
migration takes depends on the amount of data to be migrated.
Scheduling Data Progression
1 From the Storage Management menu, select System > Properties.
2 Click the Data Progression tab. The Data Progression Properties window appears.
Figure 190. System Properties - Data Progression
3 Click in the Hour, Minute, and AM/PM field. Use the up and down arrows to change the
hour, minute or time of day.
4 To limit the amount of time Data Progression runs, select a Maximum Run Time, from one
hour to unlimited time.
5 Click OK.