It looks like Hitachi-LG Data Storage, a joint venture between Hitachi and LG, have developed a new kind of storage device that is called the HyDrive. The new drive concept basically combines optical disc drive with 32GB or 64GB and is capable of multitasking, error-correcting.
After the break are three videos showing the ability of the HyDrive:
Toshiba MQ01ABDH Series Hybrid Drives combine SSD and HDD
Tue. Sep 25th, 2012
Hitachi-LG HyDrive SSD-embedded Optical Drive Officially Announced
Mon. May 31st, 2010
Raidon HyBrid SSD/HDD Combo
Thu. Feb 25th, 2010