The Promise Pegasus R6 Thunderbolt drive and the
1.5TB USB portable drive from Seagate.
(Credit: Dong Ngo/CNET)
CNET - Ever since Intel announced Thunderbolt and made it exclusively available to Macs, Windows users have been wondering if they are missing out. The truth is: yes, they are, big time. I’ve been working with the first Thunderbolt storage device, the Pegasus R6 from Promise, and find it to be the fastest consumer-grade storage device out there, period. (Stay tuned for my full review coming up soon.)
On the other hand, since Macs generally don’t support USB 3.0, which has been out for a long time and is becoming more and more popular in the PC world, Mac users have also been missing out quite a bit. Many people are wondering which is better, Thunderbolt or USB 3.0. The answer, in terms of storage applications, is neither. Consumers should really have both. The current separation of the two standards is a lose-lose situation for Windows and Mac users alike.
Here’s why
Thunderbolt is slated to offer a speed of 10Gbps (which is about 1.2GBps). Real-world storage products generally offer much less than that, but still boast very fast data throughput. The Pegasus R6, for instance, is much faster than even a SATA 3 solid-state drive. And that’s not a surprise, because the top speed of the SATA 3 standard, which is currently the fastest standard for an internal storage controller in a consumer-grade computer, is just 6Gbps (768MBps).
The Pegasus R6 hosts six SATA 3 internal hard drives. The reason it can achieve much faster throughput speeds than the standard (up to 800MBps as claimed by Promise) is because these drives are set up in RAID configurations that aggregate their individual throughput speeds into one combined speed that’s much faster than that of each drive.
So for now, there’s no point in making a Thunderbolt storage device that’s made of just one internal drive. In this case its speed would be just the same as that of the internal drive, which is again 6Gbps or slower. Even in the case of the Pegasus R6, when connected to a Thunderbolt-enabled MacBook Pro, the transfer speed is basically that of the laptop’s internal drive–much slower than what the external drive can do.
As it stands, unless you have a bunch of Pegasuses daisy-chained to one another and move data between them, you’ll never get to see the drive’s top speed when it comes to real-world data transferring. And that would be OK if investing in a Thunderbolt storage device wasn’t a big deal, but it is. The cheapest version of the Pegasus R6 costs around $1,500. That raises the question: why should you invest in such an expensive storage device just to have its performance bogged down by your computer? Maybe because you don’t have a choice. More
