Seagate’s Barracuda 7200.12 hard drive
500GB platters spinning at 7,200RPM

One of the most remarkable things about the storage industry is the fact that, although today’s hard drives are much faster than those from yesteryear, they’re still spinning at the same spindle speeds. 7,200 RPM has been the standard for desktop drives for a very long time now, supplanted only occasionally by enthusiast-oriented Raptors spinning their platters at 10,000 RPM. The enterprise world has managed to crank spindles up to 15,000 RPM, but that step up the rotational speed ladder happened more than nine years ago. Drives haven’t spun their platters any faster since.
Rather than relying on higher spindle speeds to sustain a steady diet of incremental performance improvements, hard drive makers have instead increased the precision and speed with which drives can flow data back and forth to their spinning media. The amount of data stored on those spinning platters has grown, as well, and at an exponential rate. In just the last two years, we’ve seen platter capacities jump from 200GB to 250, 333, 375, and now 500GB.
As platter areal densities rise, drive heads have access to more bits over shorter physical distances, and that translates to faster performance—particularly with sequential transfers that stream large chunks of contiguous data. And so hard drives have become faster without actually running at higher speeds.

Manufacturer: Seagate
Model: Barracuda 7200.12 1TB
Price (Street): $110-130 (Near Abt)
Availability: Soon

Front View

Interestingly, spindle speeds are actually slowing in some circles. Western Digital, for example, elected to launch its 500GB platters in the Caviar Green 2TB, which has a spindle speed close to 5,400 RPM. Seagate has taken a decidedly different approach, eschewing competing for the capacity crown in favor of bringing 500GB platters to market at lower capacity points, but with 7,200-RPM spindle speeds. The company’s latest is the Barracuda 7200.12, which packs an even terabyte, in its highest capacity form, using only two platters.

According to Seagate, the latest Barracuda 7200.12 1TB’s combination of a fast spindle speed and high areal density allow the drive to sustain data rates up to 125MB/s. That’s VelociRaptor territory, folks. Granted, 125MB/s won’t nearly saturate the new Barracuda’s 300MB/s Serial ATA interface, but then the drive also has a 32MB DRAM cache that should be quite a bit faster than its mechanical storage.

Front View


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