A controller of a recording device issues a secure command to a storage device, and then waits the time estimated necessary for the storage device to execute the secure command before issuing the next secure command. When a controller of the storage device is executing the previous command, it notifies...http://www.google.com.hk/patents/US7783895?utm_source=gb-gplus-share專利 US7783895 - Method and apparatus for encrypting data to be secured and inputting/outputting the same
