User manual

Chapter 5: Management with WebPAM PRO
145
For more information, see “Capacity Coercion” on page 246.
• Enter a time interval (1 to 12 seconds) in the Write Back Cache Flush
Interval field.
• Enter a time interval (15 to 255 seconds) in the Enclosure Polling
Interval field.
This is the time interval in which the controller polls all of the
components in the enclosure.
• Check the box to enable Adaptive Writeback Cache
• Check the box to enable Forced Read Ahead Cache
For more information, see “Choosing Cache Policy” on page 245.
6. Click the Submit button.
The changes take effect immediately.
Clearing an Orphan Watermark
An Orphan Watermark condition is the result of a disk drive failure during an
NVRAM RAID level migration on a disk array. The Clear tab remains grayed out
unless this condition is present.
To clear an orphan watermark:
1. Click the Subsystem icon in Tree View.
2. Click the Controllers icon.
3. Click the Controller icon.
4. Click the Clear tab in Management View.
5. Click the Submit button.
The change takes effect immediately.
Viewing Battery Information
The RAID controller’s cache backup battery protects data in the cache for up to
72 hours in the event of a power failure.
To view battery information:
1. Click the Subsystem icon in Tree View.
2. Click the Controllers icon.
3. Click the Controller icon.
4. Click the Battery tab in Management View.
In normal operation, the operational status of the battery shows Fully Charged
with a Reserve Capacity of 100%. If the battery is constantly recharging, its