Managing Preserved Cache
If a virtual disk becomes offline or is deleted because of missing physical disks, the controller preserves the dirty cache from the virtual disk.
The preserved dirty cache, known as pinned cache, is preserved until you import the virtual disk or discard the cache.
NOTE: Certain operations, such as creating a new virtual disk, cannot be performed if preserved cache exists. You have to enter the BIOS Configuration Utility (<Ctrl><R>) to resolve the situation before you boot to the operating system. Messages are displayed notifying you that you must enter the BIOS Configuration Utility (<Ctrl><R>) to discard the preserved cache or import the virtual disks with the preserved cache.
CAUTION: If there are any foreign configurations, it is strongly advised that you import the foreign configuration before you discard the preserved cache. Otherwise, you might lose data that belongs with the foreign configuration.
Perform the following steps to select whether to import the virtual disk or discard the preserved cache:
1On the VD Mgmt screen, click on a controller icon.
2Press <F2> to display the menu of available actions.
3Select Manage Preserved Cache.
A message is displayed advising you to import the foreign configuration before you discard the preserved cache to avoid losing data belonging to the foreign configuration. Confirm whether you want to continue. The Manage Preserved Cache screen displays the affected virtual disks.
4You can choose to discard the cache on the Manage Preserved Cache screen. If you press Cancel, the process is cancelled and the Preserved Cache Retained dialog box is displayed.
If you choose to discard the cache, you are prompted to confirm your choice. If you choose to retain the cache, a message is displayed to notify you that you cannot perform certain operations while the cache exists. Click OK to continue.
68
Management Applications for PERC Cards
