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| Product | Drobo Mini | Promise Pegasus J4 (2TB) | WD My Book VelociRaptor Duo | WD My Book Thunderbolt Duo (6TB) |
| Price | $599.00 to $1,043.67 | $699.00 to $880.99 | $649.00 to $1,167.01 | $529.99 to $861.49 |
| CNET editors' rating | 2.5 stars | 3.5 stars | 4 stars | 3.5 stars |
| Average user rating | 5 stars | 0 stars | 0 stars | 0 stars |
| Release date | Info unavailable | Info unavailable | Info unavailable | Info unavailable |
| Bottom line | The esoteric Drobo Mini seems to strive to be unique mostly for the sake of uniqueness, and offers very little, if at all, in terms of usability considering its crazily high cost. | The Pegasus J4 is currently the only good choice on the market if you're looking for a compact four-bay Thunderbolt storage device. | The My Book VelociRaptor Duo is one of the best storage devices thanks to its balanced combination of excellent performance, practical design, and relatively friendly pricing. | The WD My Book Thunderbolt Duo makes a very good external storage device for Thunderbolt-enabled Macs thanks to its comparative affordability, ease of use, and decent performance. |
| Product Description | Info unavailable | Promise Pegasus J4 - Hard drive array | WD My Book VelociRaptor Duo WDBUWZ0020JBK - Hard drive array | WD My Book Thunderbolt Duo WDBUPB0060JSL - Hard drive array |
| Packaged Quantity | Info unavailable | 1 | 1 | 1 |
| Device Type | Info unavailable | Hard drive array | Hard drive array | Hard drive array |
| Total Array Capacity | Info unavailable | 2 TB | 2 TB | 6 TB |
| Interface | Info unavailable | Thunderbolt | Thunderbolt | Thunderbolt |
| Installed Devices / Modules Qty | Info unavailable | 4 (installed) / 4 (max) | 2 (installed) / 2 (max) | 2 (installed) / 2 (max) |
| Weight | Info unavailable | 5.3 lbs | 4.2 lbs | 5.1 lbs |
| Localization | Info unavailable | United States | Latin America Canada United States | Latin America United States Canada |
| Storage Controller | Info unavailable | RAID ( Serial ATA-300 ) - RAID RAID 1 - RAID JBOD - RAID RAID 0 | RAID - RAID RAID 1 - RAID JBOD - RAID RAID 0 | RAID - RAID RAID 1 - RAID JBOD - RAID RAID 0 |
| Hard Drive | Info unavailable | 4 x 500 GB Standard Serial ATA-300 | 2 x 1 TB Standard | - Thunderbolt technology 2 x 3 TB Standard - Double-safe data protection |
| OS Required | Info unavailable | Apple MacOS X | Apple MacOS X 10.6.8 or later | Apple MacOS X 10.6.8 or later |
| Manufacturer Warranty | Info unavailable | 2 years warranty | 3 years warranty | 3 years warranty |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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Drobo Mini compare
