Hitachi G-Drive Mini external hard drive

Hitachi G-Drive Mini: Design and features

The G-Drive Mini looks different to the G-Drive Slim, which was designed to be as thin as possible (as you’d expect). The aluminium finish is the same, but the Mini has a swiss-cheese perforated shell and a finned heatsink on the base, looking like a smaller version of the full-size G-Drive. The enclosure is relatively tall and slightly bulky for a 2.5in laptop enclosure.

Around the back of the drive, you’ll find a pair of FireWire 800 ports — one for connecting to your laptop or PC, and another to daisy-chain another FireWire device if needed. There’s also a mini USB 2.0 connector as a backup. A 12V power supply port is built into the back along with a power switch, but bafflingly no power supply is included. We can understand including a connector for external power for any situation where a laptop’s USB port isn’t able to supply enough power, but you’ll need to purchase a power supply separately. We do appreciate the inclusion of a power switch.

Hitachi G-Drive Mini: Performance and specifications

The hard drive inside the Hitachi G-Drive Mini is a 7200RPM SATA-II model with a 16MB cache — it’s the Travelstar 7K500. When it was originally released it was a high-performance drive amongst 2.5in models, but it has been around since mid-2010 and we’d be certain of better performance from a drive like the Seagate Momentus XT, if only it were available in an external configuration.

The Hitachi G-Drive Mini is more than fast enough to hit the maximum throughput of USB 2.0, maintaining an average read rate of 33.2MB/sec in our testing. Writing was marginally slower at 29.0MB/sec. Read access time was an unexciting 17.3ms. FireWire 800 produced better results with read speeds of 69.7MB/sec and write speeds of 55.3MB/sec. This is not as fast as an eSATA drive might produce, but most eSATA ports are not powered and therefore aren’t practical for portable use.

We’ll update this review with a graph of our results over FireWire 800 soon.

We think the Hitachi G-Drive Mini gives good performance over FireWire 800, and the best performance that can be expected over USB 2.0. It would make a good portable scratch disk for bandwidth-heavy programs like Adobe Photoshop or Premiere.

Hitachi G-Drive Mini: Conclusion

Hitachi’s G-Drive Mini may come in a slightly bulky enclosure, but its performance over FireWire 800 is enough to put it significantly ahead of any USB 2.0 drive. Newer laptops would be better served with a powered eSATA or USB 3.0 external drive, but older and newer Mac laptops (and desktops) could make good use of the G-Drive Mini.