Many of you are thinking about buying an external hard drive for backups. The most common type on the store shelves uses USB 2.0 to connect to your computer. You can buy one of these, connect it to nearly any computer, and get so-so speeds. A FireWire drive will give you roughly similar performance, but at a higher price and less compatibility.
On the other hand, if your computer supports eSATA (external Serial Advanced Technology Attachment), you can make your backups go a lot faster with a compatible external hard drive. eSATA basically extends your computer’s internal SATA ports outside your computer. It uses a stronger type of data cable connector, however, so an eSATA plug is shaped differently than a SATA plug.
From personal experience that eSATA is fast, but I’d never pinned down exactly how fast it was in comparison to internal, USB, and FireWire drives. I set out to test a drive using each of these interfaces and benchmarking software to prove which one is the victor.
Vantec graciously loaned me a couple of excellent external hard drive enclosure kits. Add your own 3.5-inch hard drive to one of these enclosures, and you’ll have an external drive ready for backups or extra storage space. One kit, the NexStar 3 NST-360SU, turns a SATA drive into an eSATA and USB 2.0 unit. The NexStar 3 NST-360UF accepts a common IDE (Integrated Drive Electronics) hard drive and supports USB 2.0 and FireWire.
And there was the rub. Unfortunately, I couldn’t use the same drive for all my tests because the eSATA enclosure required a SATA drive and the FireWire kit needed an IDE drive. To get around this, I located two 80GB Maxtor hard drives that were identical except for their interfaces, SATA and IDE (the 6Y080M0 and 6Y080P0).
As you can see from my test results in the chart, eSATA is undeniably the fastest external option. With a substantial performance lead over USB or FireWire, eSATA can significantly speed up your backups. In fact, eSATA is so fast that you won’t be able to tell whether you’re accessing an internal or external drive.
There’s more good news: Even if your computer doesn’t have an eSATA port, you may not need to buy a $25 adapter card to add one. The Vantec NST-360SU comes with a simple bracket that installs in an empty expansion card slot and connects to one of your motherboard’s SATA plugs. I found similar brackets from here, here, and others online for few dollars only.
USB will be with us for a long, long time. As a hard drive connection, though, its days are numbered.