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Strengths: High capacity, variety of fast interfaces, RAID 0 or 1, quieter than competitors
Weaknesses: Only 1-year warranty (Seagate warranty for internal drives are currently 5-year), interfaces are too slow to achieve peak performance of this unit
Summary: This is a great drive for anyone, especially Mac users who are looking to add additional storage. I would not recommend using RAID 0 unless you are using this for a scratch drive. It's just too risky to use RAID 0 because if one drive fails, then all your data is lost. But like I said, using it as a scratch drive where you don't care if the data is lost is fine.
I only use it in RAID 1 mode and found the performance to be acceptable. The problem with this unit is that the fastest interface supported is Firewire 800, which yields a theoretical maximum bus speed of 100 MB/s. According to Maxtor here are the sustained transfer rates:
Sustained Transfer Rate
USB 2.0 — 33 MB/sec;
FireWire 400 — 43 MB/sec;
FireWire 800 — 91 MB/sec
That means that if you have this unit with other hard drives connected to the same Firewire 800 bus, then you will saturate your bus before you max out the throughput of this drive. If you want to get peak performance, you probably have to put this drive on its own Firewire bus or card. That means taking up a PCI slot in your computer.
If you're looking to have more than one unit connected to your computer and you need RAID 0 or 1, then I would seriously consider a SATA external enclosure instead. That would give you much higher bus speeds and performance. Unfortunately most mainstream manufacturers do not yet make external SATA enclosures.

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