Product manual

Chapter 4: Management with WebPAM PROe
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• Check the Enable LUN affinity box to enable the LUN affinity feature.
If your subsystem has two controllers and Cache Mirroring is disabled,
LUN Affinity is enabled automatically.
• Check the SMART Log box to enable the Self-Monitoring, Analysis, and
Reporting System (SMART).
• Enter a polling interval in SMART Polling Interval field.
The range is 1 to 1440 minutes. 1440 minutes equals one day.
• Check the Coercion Enabled box to enable disk drive capacity coercion.
When disk drives of different capacities are used in the same array,
coercion reduces the usable capacity of the larger disk drive(s) in order
to match the smallest capacity drive.
For more information, see “Capacity Coercion” on page 293.
• Select a coercion method from the Coercion Method dropdown menu.
The choices are:
GB Truncate – Default. Reduces the useful capacity to the nearest
1,000,000,000 byte boundary.
10GB Truncate – Reduces the useful capacity to the nearest
10,000,000,000 byte boundary.
Group Rounding – Uses an algorithm to determine how much to
truncate. Results in the maximum amount of usable drive capacity.
Table Rounding – Applies a predefined table to determine how much to
truncate.
• Enter a time interval in the Write Back Cache Flush Interval field.
The range is 1 to 12 seconds. For more information, see “Cache Policy”
on page 288.
• Enter a time interval in the Enclosure Polling Interval field.
The range is 15 to 255 seconds.
• Check the Adaptive Writeback Cache box to enable the Adaptive
Writeback Cache feature.
For more information, see “Adaptive Writeback Cache” on page 289.
• Check the Host Cache Flushing box to enable the Host Cache Flushing
feature.
For more information, see “Host Cache Flushing” on page 290.
• Check the Forced Read Ahead Cache box to enable the Forced Read
Ahead Cache feature.
For more information, see “Forced Read Ahead Cache” on page 290.