Unisphere and Unisphere Central 2020 R1 Administrator's Guide

Enable or Disable Read/Write Caching for a Volume

Read and write caching generally improves performance. To improve performance, disable write caching on volumes that use SSD storage.

1. If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane of Unisphere Central.
2. Make sure Allow Cache Selection is enabled for volumes in the Storage Center user preferences.
   1. In the upper right corner, click (Storage Center Settings).
      The Storage Center Settings dialog box opens.
   2. Click the Preferences tab.
   3. Make sure the Allow Cache Selection checkbox is selected.
   4. Click OK.
3. From the STORAGE menu, click Volumes.
   The Volumes view is displayed.
4. In the Volumes view select the volume you want to modify.
5. Click (Edit).
   The Edit Volume dialog box opens.
6. Expand Advanced Settings.
7. Enable or disable the cache options as needed.
   • Select or clear the Read Cache check box.

     For volumes using SSD storage, test applications before enabling or disabling read cache.

   • Select or clear the Write Cache check box.

     To improve performance, disable write caching on volumes that use SSD storage for most applications.

8. Click OK.