The G-Technology G-RAID mini is a portable high-performance dual-drive external storage system. The two hard disk drives (HDD) in the storage device can be\u00a0set to RAID 0 for optimal performance or RAID 1 for fail-safe operation. And the G-RAID mini's back panel\u00a0has four high-speed interfaces\u00a0to connect to your PC:\u00a0USB 2.0; eSATA; and two FireWire 800.\u00a0\n\tThe G-RAID mini is designed for mobile professionals, according to\u00a0G-Technology, and many businesses will appreciate the data protection that's afforded by the gadget's RAID 1 mode.\n\tThe design of the all-aluminum enclosure looks great, and it helps dissipate heat so the portable storage system feels only slightly warm when in use. A fan on the bottom is whisper quiet so it should not be noticeable in most office environments.\n\tRAID on the G-RAID Mini\n\tMy\u00a01TB review unit came with RAID 0 configured, which offers no protection against data HDD failure. Switching modes requires the RAID configuration software, which\u00a0comes with the drive on a\u00a0CD. The\u00a0software tool\u00a0was outdated, however, and I had to download an updated utility from the company's technical support site to switch the device to RAID 1 mode. (The 64-bit version of the utility on my Windows 7 Ultimate 64-bit laptop was unable to detect the device, so\u00a0I eventually\u00a0used the 32-bit version of the RAID tool on another laptop.)\n\tThe back panel of the G-RAID mini. From left to right: eSATA; FW800; FW800; USB 2.0; and AC adapter.\n\tSwitching modes\u00a0was as easy as\u00a0detecting the G-RAID mini running the RAID Configurator tool, and then\u00a0clicking the desired mode and a confirmation button.\u00a0Re-initialization, partitioning and formatting is required before the drive is ready for use after switching modes.\n\tG-RAID Mini: My Experience\n\tI did a couple of tests while connected via USB 2.0 to my laptop in RAID 1 mode and formatted with NTFS. Transfer speed while copying a 6.4GB DVD image was about 29.2 MB\/s. Copying data from the G-RAID mini to another source was slightly faster at 31.9 MB\/s.\u00a0These speeds may be\u00a0limited by\u00a0USB, and you may see better performance\u00a0using eSATA and FireWire.\n\tA white LED light on the front panel flashes when there is activity.\n\tG-Technology says raw transfer speeds may not necessarily equate to\u00a0real-world performance. The company\u00a0also claims\u00a0the G-RAID mini supports simultaneous playback of multiple layers of video in real-time in Final Cut Pro, Premiere and Xpress Pro.\n\tI wasn\u2019t able to test it in eSATA mode, but G-Technology says that the G-RAID mini delivers data-transfer rates of up to 120MB\/s using eSATA in RAID 0. Such speeds would be great for on-the-go use via USB 2.0 on a laptop or\u00a0copying data\u00a0from the drive to a desktop system using the much faster eSATA interface. And the G-RAID mini can be bus-powered by FireWire when on the go,\u00a0even when eSATA is used.\n\tG-RAID Mini: Conclusion\n\tThe G-RAID mini is available in 1TB and 1.5TB (for 7200RPM HDD) capacities, and it costs\u00a0$299.99 and $399.99 respectively.\u00a0G-RAID mini is backed by a 3-year factory warranty.The devices are expensive for portable storage systems, but the valuable data protection features help justify the price.\n\tI would have\u00a0liked to see the\u00a0G-RAID mini preconfigured with data mirroring mode (RAID 1) when shipped, for this reason, instead of having to be manually configure it.\n\tA 1.5-inch fan on the bottom of the G-RAID mini help keep the two HDDs cool.\n\tSide profile of the storage system.\n\tThe G-RAID mini comes with a handy case that fits it snugly.