As digital broadcasting televisions are increasing and the high definition audiovisual content becomes popular rapidly, the data size of the audiovisual content strikingly increases and the transfer rate of such content becomes much higher. As the result, a larger capacity to record an audiovisual Content and a higher access speed are increasingly demanded.
Hard disk drives themselves satisfy those requirements for the audiovisual content. However, the hard disk drive that it is difficult to be replaced with a larger capacity of a hard disk drive available in the current embedded in an appliance such as a set-top box has such problems market and the library of recorded content for a long time cannot be taken over to a new hard disk drive. To solve these problems, we proposed the iVDR1 media as a standard on the worldwide market.