Bit-patternedRecording
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Toshiba demonstrates successful BPR HDD, is 2.5Tb per inch a platter's last stand?
We'll be honest: we thought SSDs would suck down most of platter-based storage's milkshake by now -- that magnetic disks would follow tapes into obscurity. Alas, SSDs are still niche items, and Toshiba is doing all it can to keep them that way, demonstrating a successful prototype of a new storage technique called bit-pattern recording that currently generates a storage density of 2.5Tb per square inch. That's about five times more dense than the company's current offerings, achieved by placing individual bits onto lithographed "islands" of magnetic material. This protects the charge of the individual bits and allows those sectors to be much smaller. Toshiba suggests we won't see these until 2013, but now we're left wondering what's next... can engineers stuff even more bits onto these things?
New HDD writing methods could boost platter densities by 5x or more
Just when we think that platter-based storage is on its way out it keeps on coming back with a vengeance. A few years ago it was perpendicular recording boosting storage densities by a few orders of magnitude, now it's a pair of new techniques that could push things much further. Your average disk today can manage a couple-hundred GB per square inch while still delivering reliable writes, but if all goes to plan the write methods called bit-patterned recording (BPR) and thermally-assisted recording (TAR) could raise that to 1TB per inch initially and upwards of 10TB per inch down the road. BPR relies on segregating the disk sectors with lithographed "islands" while TAR relies on heating and cooling techniques that preserve the data in nearby sectors. When these Wonder Twins combine, disk sectors can be as small as 15nm in diameter and write speeds can hit 250Mb/sec. Yes, that's megabits, so while you'll be able to store a lot more data than on conventional platters, you won't be able to do so any more quickly than now.
