3Ware 9500S-4LP User Guide - Page 98

Configuring Units Notes: For 9000-series controllers, a setting at the BIOS level in 3BM can specify that the cache should be disabled in the event the unit degrades. When that option is selected, unit write cache cannot be enabled until the array is rebuilt and again in optimal mode. In 3DM, you can see whether Disable write cache on unit degrade is set in the Other Controller Settings section of the Controller Settings page. For more information, see "Disabling Write Cache on Unit Degrade" on page 79. Write cache settings are not applicable for an unconfigured disk (JBOD). Enabling and Disabling the Unit Write Cache through 3DM 1 Choose Management > Controller Settings from the menu bar. 2 In the Unit Write Cache section of the Controller Settings Page, select the Enabled or Disabled option for each unit. The page refreshes, and a message at the top confirms the change you have made. For more information about the write cache settings, see the reference section, "Controller Settings Page" on page 53. Enabling or Disabling the Write Cache through 3BM 1 At the main 3BM screen, select the unit by highlighting it and pressing Enter. An asterisk appears in the left-most column to indicate that it is selected. 2 Tab to the Maintain Unit button and press Enter. 3 In the Maintain Array screen, Tab to the field Array's Write Cache State. 92 3ware 9000 Series Serial ATA RAID Controller User Guide