Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 31)

verifies that the SPS monitoring system is functioning correctly.
Update the storage system configuration settings in order by performing the steps in the following subsections.
Updating the Cache Page Size and High/Low Watermark Settings
1. Open a Web browser and connect to the storage management server (usually the IP address of the storage processor on a Dell | EMC
storage system).
2. Click the Storage tab.
3. Right-click the storage device you want to manage and select Properties.
4. In the System Properties window, click the Cache tab.
5. In the Configuration box, click the Cache Page Size down-arrow and select 8K.
6. Go to " Updating the High/Low Watermark Settings ."
Updating the High/Low Watermark Settings
1. In the Configuration box, verify the following:
a. Low Watermark value is set to 60.
b. High Watermark value is set to 80.
2. Ensure that the Enable Watermark Processing check box is selected.
3. Click Apply to apply the new settings.
4. Click OK.
5. Go to " Updating the SPS Test Time Setting ."
Updating the SPS Test Time Setting
1. In the Storage tab, click the plus sign (+) to the left of the storage system.
2. In the Storage tab, click the plus sign (+) to the left of Physical.
3. In the Storage tab, click the plus sign (+) to the left of Enclosure SPE.
4. In the Storage tab, click the plus sign (+) to the left of Standby Power Supplies.
5. Right-click Enclosure xPE SPS A and select Set Test Time.
The Battery Test Time Dialog window appears.
6. From the Test Day drop-down menu, select the appropriate day to run the SPS battery test. The default setting is Sunday.
NOTE: Because I/O performance may decrease during the SPS test, Dell recommends that you run the SPS battery test during a
period of time when your storage system is inactive or when the storage system I/O is minimal.
7. From the Test Time (GMT) drop-down menu, select the appropriate time of day to run the SPS battery test.
The default setting is 01:00 AM. This value is displayed in GMT.
8. Click OK.
9. Close your Web browser.
See the Navisphere Manager online help for more information on updating the SPS test time settings.