• Create a disk image that can be imported and booted on a different system.• Assist in software or configuration testing, where half of the mirror can be removed to ensureconfiguration consistency.NOTE: The Break Mirror operation is not available within the booted operating systemenvironment. It is only available in the BIOS Configuration Utility ( ) utility and theUEFI RAID configuration utility.Break Mirror In BIOS Configuration UtilityThe RAID 1 virtual disk that you wish to split must be in an optimal state, and it cannot be running anyother background tasks.To use the Break Mirror feature from the BIOS Configuration Utility ( ), perform the followingsteps:1. During boot up, press when prompted by the BIOS screen. If there is more than onecontroller in the system, choose the controller.The VD Mgmt screen is displayed by default.2. Highlight the appropriate Disk Group.3. Press to display the available actions.4. Choose Break Mirror and press .A dialog box is displayed describing the operation and asking if you are sure you want to perform theoperation.5. Select Yes to continue.The exported disk (exporting configuration) spins down and the hard drive status LED starts flashingto identify which drive must be removed.The remaining disk (exporting configuration) is in a degraded state until the missing member isreplaced or rebuilt.If there are any Global or Dedicated Hot Spare assigned, which fulfills the rebuild requirements forthe degraded RAID 1 disk, a rebuild starts automatically. If there is no hot spare assigned, then an hotspare that meets all the requirements for the virtual disk must be assigned before the rebuild starts.NOTE: Importing a broken mirror is the same as importing a foreign configuration. SeeImporting Or Clearing Foriegn Configurations Using VD Mgmt Menu. The imported virtual diskis in a degraded state until the missing member is rebuilt.Managing Preserved CacheIf a virtual disk goes offline or is deleted goes of missing physical disks, the controller preserves the dirtycache from the virtual disk. The preserved dirty cache, known as pinned cache, is preserved until youimport the virtual disk or discard the cache.NOTE: Certain operations, such as creating a new virtual disk, cannot be performed if preservedcache exists. You have to enter the BIOS Configuration Utility ( ) to resolve the situationbefore you boot to the operating system. Messages are displayed notifying you that you must enterthe BIOS Configuration Utility ( ) to discard the preserved cache or import the virtualdisks with the preserved cache.CAUTION: If there are any foreign configurations, it is strongly advised that you import theforeign configuration before you discard the preserved cache. Otherwise, you might lose datathat belongs with the foreign configuration.49
