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. This 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 pinned cache exists. You have to enter the BIOS Configuration Utility to resolve the situation before you boot to the operating system. Messages are displayed notifying you that you must enter the BIOS Configuration Utility to discard the pinned cache or import the virtual disks with the pinned 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 displays to advise you to import the foreign configuration before you discard the preserved cache. Otherwise, you can lose data that belongs with the foreign configuration. Confirm whether you want to continue. The Manage Preserved Cache screen displays the affected virtual disks.

4On the Manage Preserved Cache screen, choose whether to discard the cache. You can discard the cache or press Cancel to display the Preserved Cache Retained dialog box.

If you choose to discard the cache, you are prompted to confirm your choice. If you choose to retain the cache, a message displays to notify you that you cannot perform certain operations while the cache exists.

Click OK to continue.

Some operations, such as creating a new virtual disk, are not allowed if preserved cache exists. A message warns you that you cannot perform the operation while preserved cache exists. If you choose to clear a configuration, and preserved cache exists, a message warns you that all data on all virtual drives is lost and the preserved cache is discarded.

Configuring and Managing RAID

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Dell UCP-61, UCC-60, UCP-60 manual Managing Preserved Cache
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UCP-61, UCP-60, UCC-60 specifications

The Dell UCC-60, UCP-60, and UCP-61 are innovative solutions that enhance collaborative experiences in modern workplaces. These products integrate cutting-edge technologies to facilitate seamless communication and create a dynamic meeting environment.

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