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Product Review: Promise Pegasus2 M4 RAID

December 7, 2014  •  By Larry Jordan

[ Read my product review disclosure statement here.]

This week, I’ve had the pleasure of working with two different SSD drives; one from Promise Technology and the other from OWC.

NOTE: You can read my OWC review here.


The Promise Pegasus 2 M4 is a small, 4-bay RAID that can be configured with either SSD or standard hard disks. The Pegasus 2 family of RAIDs “offers creative enthusiasts and professionals portable RAID storage for post-production and broadcasting, such as offsite shoots, remote studios, or department workgroups.” (Promise website)

The M4 is designed for portability and, when equipped with SSD drives, serious performance. Using the included Promise Utility, the system can be configured as RAID 0, 1, 5, 6, or 10. Sporting two Thunderbolt 2 ports, it can store up to 4 TB using standard hard drives, or 2 TB using SSD drives. It weighs less than six pounds, is about the size of two coffee mugs, and comes with a 2-year warranty.

If you are looking for something small, light, really fast, and reliable, this is the drive to consider. However, the Promise website highlights data rates exceeding 1300 MB/second. I was not able to come even close to that.

Manufacturer: Promise Technology, Inc.
Website: www.promise.com
MSRP: $1,199 (HD version) $2,499 (SSD version)
Product Webpage: http://www.promise.com/promotion_page/promotion_page.aspx?region=en-US&rsn=167


Since I had both the Promise and OWC units here, I thought it would be interesting to compare the two for size. (The Promise is on the left.) The Promise is about an inch wider.

But it is also about an inch-and-a-half less deep.

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