The benefits of running Office on an SSD proved difficult to express in numbers. I expected, though, that I'd find some very measurable and well-defined performance differences among my drives, in favor of the SSDs, in my final two tests: a drive-wide search on files' content and a plain defragmentation of each drive.

The killer app for SSD Instead, after running the defrag, I had to register a tie because the clock stopped at just about the same 3-minute, 20-second mark for the three drives -- although the larger Pro 7000 finished a handful of seconds sooner. Again, all drives had identical content, being clones of the same original drive.

However, I found a significant performance difference in favor of the SSDs when running a search. I used the standard Windows Explorer search applet, setting the scope to the entire drive and scanning all file content for the same word. The two Imation drives completed the search in about 57 seconds, while it took the VelociRaptor more than twice as long to find the same results.

By the end of my review, it was absolutely clear that any of the three drives I tested would be a significant improvement over older drives. However, I don't have a simple answer to the main question: Are SSDs worth deploying? It depends on the applications you need to run and the criteria used to reach that conclusion.

It's hard to justify the purchase in terms of price/capacity ratio, for example. With a nominal capacity of 300GB, the VelociRaptor has the best ratio: You can find the drive sold at US$350 per unit or less on the Internet.

Nevertheless, if fast search is your main challenge -- consider, for example, applications such as data classification and analysis -- the Pro 7000's nearly 3-to-1 performance advantage over the Western Digital drive can somewhat mitigate the stiff price difference.

There are other factors to consider as well. Both vendors bestow a generous five-year warranty on their products, which suggests confidence in the resilience of these remarkable drives. However, it's only fair to note that while the VelociRaptor is a new drive, SSD technology doesn't have a comparably long track record to match its rival.

It's also worth noting that Imation indicates 1 million hours MTBF (mean time between failure) for the Pro 7000, while the VelociRaptor claims 1.4 million hours.

Finally, there's the green factor: SSDs have no electric motor inside, which translates in a much lower wattage per unit. Some models I have examined running at full speed absorb half the electricity used by spinning drives, which can translate to lower energy consumption and longer battery life in laptops and other mobile devices. Moreover, SSDs generate much less heat , which means less work and, again, less power needed to keep the temperature within limits.

When drawing all conclusions, the VelociRaptor emerges as the winner of this comparison because it offers a harmonious blend of excellent performance in many areas at a reasonable price, elements that will attract admins looking to improve application responsiveness.

Although their high sticker price banished the two Imation drives from first place in this bake-off, this confrontation with the VelociRaptor -- probably the fastest conventional SATA drive at the moment -- proves that solid-state flash has an as-yet unrivaled contribution to make to reduce applications lag. The technology's high price is still a significant spoiler, but all planets seem aligned to predict a rosy and less expensive future.