Other than the odd power issue mentioned above, the R8 worked well in my testing and, considering its large fan on the back and the huge physical size, it was surprisingly quiet, and produced almost no vibration. Now the Pegasus2 R8 has almost double the speed. When I tested the original Pegasus R6, it was by far the fastest external storage device. However, most of them are not hardware RAID systems, hence they are much less complicated than the Pegasus2. Most other Thunderbolt devices I've reviewed have much shorter wake-up time some are nearly instantaneous.
This is a huge improvement from the previous Pegasus models. The Pegasus2 now shares its power status with the host, which means that when the computer shuts down, the Pegasus2 will as well, and it will then turn back on by itself when the computer powers up. This means that in real-world usage, especially if you use a laptop such as the new MacBook Pro with the Pegasus2, you should make sure you you save your files before taking a break and exercise patience when you get back. In my testing, the device would dismount when the host computer went into sleep mode, which is expected, and would take somewhere from 15 to 30 seconds to wake up and reconnect by itself once the host awoke. While I was impressed with the RAID support, the Promise Pegasus2 R8's power management could use a little improvement. Other than that, it shares the same kind of port and cable as Thunderbolt and is also backward-compatible with existing Thunderbolt devices. Note that Thunderbolt 2 is the next generation of Thunderbolt, which offers a 20Gbps connection speed (twice that of Thunderbolt).
Other than the black color and the support for Thunderbolt 2, the new Pegasus2 lineup is almost exactly the same as the previous generation. I tested the R8 model, which is very representative of all three.
The more drives generally means more storage space and RAID options. The number of drives is the only difference among the three models.
Housing standard SATA desktop hard drives of 2TB, 3TB, or 4TB, the Pegasus2 offers somewhere between 8TB and 32TB, depending on the models. The Pegasus2 family includes three models - the R4, the R6, and the R8 - that can house four, six, and eight internal drives, respectively. The all new Pegasus2 R8 (left) next to the previous generation, the Pegasus R6.
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