Further increase in data density is not possible without the use of a variety of advanced technologies : helium environment and warming plate with a laser at the time of recording. The latter option was abbreviated HAMR, magnetic heated recording.
Western Digital Corp. said yesterday in one of the industry events in China, it has demonstrated a working system based on the hard drive size 2.5 ", using the technology of heated magnetic recording . According to the manufacturer, this technology allows to increase the recording density of more than five times, and the specific capacity of a magnetic plate may be increased to 4 terabits per square inch. So, for sizes 3.5 "is roughly equivalent to a single wafer capacity 4.8 terabytes.
While Western Digital will solve a lot of problems associated with an increase in the recording density by laser heating of the magnetic plates. Competitor ( Seagate )also leads the appropriate development , working with TDK.