
I can't help but resist thinking about where storage capacities are about to start going. To the moon I tell you --to the moon.
Last week Seagate took the covers off their latest hard disk drives based on Perpendicular Recording technology. Perpendicular recording is a way of writing data to a disk (versus longitudinal), so that a storage medium can store more data in the same amount of space. How do they do that?
Here's an analogy: Longitudinal recording is like taking a ton of toothpicks, and then laying them end to end, until they circumference the entire Earth. Lets say for this example, that it would take 1 Billion toothpicks. Now, instead of laying the toothpicks end to end around the Earth, Perpendicular Recording actually stands each toothpick on its end so that it only takes up a fraction of the width that it would, when laying on its side. This way, maybe it would take 20 toothpicks to make up the same length as one toothpick on its side. That means multiplied out, we could now use 20 Billion toothpicks to circumfrence the entire globe. Perpendicular Recording is just like that!! It's this sort of perpendicular arrangement of each bit of data on the recording medium (hard disk in this example) that allows drives to reach capacities many times higher than those of today's hard disk drives.
Until literally 2 weeks ago....the maximum capacity of any single 3.5-inch hard drive on the market (like the one in your computer) was 500 Gigabytes (GB). And the truth is, many manufacturers were having trouble making a higher capacity hard drive. All the larger 1 Terabyte (TB) hard drives on the market today are actually just two separate 500GB hard drives slapped together and screwed into a metal case (and then called a 1TB hard drive). This is because of a variety of issues that limit the capacities and access speeds achievable by todays traditional drive technologies. The most important theoretical limit to higher capacities today, is the problem of the
Superparamagnetic effect (big science term). Essentially the problem is that using longitudinal recording, we have found that bits can only be packed to a certain density on the magnetic disc platter. If they're packed too tightly, the bits start to break, and the data is lost. In addition to the magnetic problems, there are other physical difficulties in improving on todays drives. For example, disk platters (the magnetic disks inside a hard drive that literally spin around inside), have already reached their maximum size, density, and rotational speed (as high as 15,000 revolutions per minute on some high end drives). If manufacturers pushed them to spin any faster, the platters would litterally crash into each other the moment they were subjected to any sort of shock or vibration. To give you an example of the type of speed we're talking about: If the round platter were actually a wheel spinning on the ground; it would be traveling at 156.108 miles per hour. Very Fast.
Anyway, back to the point of capacities..Seagate's new 750GB 3.5inch hard drive is now the highest capacity (and best performing) retail hard drive on the market today. Thats right! In addition to being the highest capacity drive, it is also one of the fastest drives on the market today because of perpendicular recording. Because there is so much more data per square inch of recording media, the heads (read needles) that read the data don't have to move as far forward, to read the next bit of data in the sequence. This results in dramatically faster access to your data, whether it be your videos, photos, music, or text.
Perpendicular storage is going to change the world we live in. I am certain of it. According to this
white paper from Seagate, "[using perpendicular recording,] a 3.5-inch disc drive could store two terabytes of information, a 2.5-inch drive in a laptop could hold 500GB and a
1-inch drive, such as those in MP3 players, could store as much as 50GB of data."
Considering that todays 3.5 inch drives are 500GB, and today's laptop drives are 120GB, and today's MP3 players are maxed at just 8GB....you can see why I am so excited. With the introduction of these new higher capacity drives, its been proven that perpendicular recording is going to be a practical solution to higher storage capacities. Its a pretty exciting thing...
I personally cant wait to get my hands on a 500GB Ipod Video.
P.S. sorry this read like a commercial, theres just a lot to explain.