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| Product | Promise Pegasus R6 (12TB, SATA III) | LaCie Rugged USB 3.0 Thunderbolt (1TB) | WD My Book Thunderbolt Duo (4TB) | LaCie 5big Thunderbolt (10TB) |
| Price | $2,230.00 to $2,339.50 | $208.99 to $240.00 | $445.00 to $745.23 | $1,079.99 to $1,200.99 |
| CNET editors' rating | Info unavailable | 4 stars | 3.5 stars | 4 stars |
| Average user rating | 0 stars | 0.5 stars | 0 stars | 0 stars |
| Release date | Info unavailable | Info unavailable | Info unavailable | Info unavailable |
| Bottom line | Info unavailable | Fast, flexible, rugged, and affordable, the LaCie Rugged Thunderbolt is one of the best high-end portable drives on the market. | 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. | Though it lacks RAID 5, the speedy 5big Thunderbolt is still worth the hefty investment, and is a better buy than competing devices. |
| Product Description | Promise Pegasus R6 - Hard drive array | Info unavailable | WD My Book Thunderbolt Duo WDBUPB0040JSL - Hard drive array | LaCie 5big Thunderbolt Series - Hard drive array |
| Packaged Quantity | 1 | 1 | 1 | 1 |
| Device Type | Hard drive array | Info unavailable | Hard drive array | Hard drive array |
| Total Array Capacity | 12 TB | Info unavailable | 4 TB | 10 TB |
| Interface | Thunderbolt | Info unavailable | Thunderbolt | Thunderbolt |
| Installed Devices / Modules Qty | 6 (installed) / 6 (max) | Info unavailable | 2 (installed) / 2 (max) | 5 (installed) / 5 (max) |
| Dimensions (WxDxH) | 7.4 in x 9.3 in x 9.8 in | Info unavailable | 3.9 in x 6.2 in x 6.5 in | 6.8 in x 7.7 in x 8.7 in |
| Weight | 13 lbs | 9.2 oz | 4.9 lbs | 16.8 lbs |
| Storage Controller | RAID ( Serial ATA-600 ) - RAID RAID 1E - RAID RAID 1 - RAID RAID 10 - RAID RAID 6 - RAID RAID 5 - RAID RAID 0 | Info unavailable | RAID - RAID RAID 1 - RAID JBOD - RAID RAID 0 | RAID ( Serial ATA-600 ) - RAID RAID 1 - RAID JBOD - RAID RAID 0 |
| Hard Drive | 6 x 2 TB Hot-swap | Info unavailable | - Thunderbolt technology 2 x 2 TB Standard - Double-safe data protection | 5 x 2 TB Hot-swap |
| Hard Drive (2nd) | None | Info unavailable | None | None |
| OS Required | Apple MacOS X 10.6 or later | Info unavailable | Apple MacOS X 10.6.8 or later | Apple MacOS X 10.6 or later |
| Manufacturer Warranty | 2 years warranty | 2 years warranty | 3 years warranty | 3 years warranty |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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Promise Pegasus R6 compare (12TB, SATA III)
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