linux系統啟動過程中給出錯誤：
There are offline or missing virtual drives with preserved cache. Please check the cables and ensure that all drives are present.
Press any key to enter the configuration utility.
無法進入系統。
解決辦法如下:
進入raid管理，F2，編輯profile --> Managing Preserved Cache --> discard the cache, 然后保存，Ctrl+Alt+Del 重啟。問題解決。
附：DELL官方對此問題的一些說明：
Error Message：There are offline or missing virtual drives with preserved cache.Please check the cables and ensure that all drives are present.Press any key to enter the configuration utility.
Probable Cause：The controller preserves the dirty cache from a virtual disk if the disk becomes offline or is deleted because of missing physical disks.
This preserved dirty cache is called pinned cache, and is preserved until you import the virtual disk, or discard the cache.
Corrective Action：Use the <Ctrl><R> utility to import the virtual disk or discard the preserved cache. For the steps used to manage preserved cache, see Managing Preserved Cache.
更多錯誤信息也可參考DELL官方支持網站：http://support.dell.com/support/edocs/storage/Storlink/H700H800/en/UG/HTML/chapterk.htm
或者：http://stuff.mit.edu/afs/athena/dept/cron/documentation/dell-server-admin/en/Perc6i_6e/chapterj.htm