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| Product | WD My Book Thunderbolt Duo (6TB) | WD My Book VelociRaptor Duo | LaCie 2big Thunderbolt Series (6TB) | WD My Book Thunderbolt Duo (4TB) |
| Price | $549.00 to $880.64 | $599.00 to $1,175.92 | $699.99 | $499.00 to $749.12 |
| CNET editors' rating | 3.5 stars | 4 stars | 3.5 stars | 3.5 stars |
| Average user rating | 0 stars | 0 stars | 5 stars | 0 stars |
| Release date | Info unavailable | Info unavailable | Info unavailable | Info unavailable |
| Bottom line | 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. | 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 LaCie 2big Thunderbolt Series strikes a balance between capacity, performance, and price and would be a good choice for owners of Thunderbolt-enabled computers. | 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 | WD My Book Thunderbolt Duo WDBUPB0060JSL - Hard drive array | WD My Book VelociRaptor Duo WDBUWZ0020JBK - Hard drive array | LaCie 2big Thunderbolt Series - Hard drive array | WD My Book Thunderbolt Duo WDBUPB0040JSL - Hard drive array |
| Packaged Quantity | 1 | 1 | 1 | 1 |
| Device Type | Hard drive array | Hard drive array | Hard drive array | Hard drive array |
| Total Array Capacity | 6 TB | 2 TB | 6 TB | 4 TB |
| Interface | Thunderbolt | Thunderbolt | Thunderbolt | Thunderbolt |
| Installed Devices / Modules Qty | 2 (installed) / 2 (max) | 2 (installed) / 2 (max) | 2 (installed) / 2 (max) | 2 (installed) / 2 (max) |
| Dimensions (WxDxH) | 3.9 in x 6.2 in x 6.5 in | 3.9 in x 6.2 in x 6.5 in | 3.6 in x 7.9 in x 6.8 in | 3.9 in x 6.2 in x 6.5 in |
| Weight | 5.1 lbs | 4.2 lbs | 6 lbs | 4.9 lbs |
| Localization | Latin America United States Canada | Latin America Canada United States | Info unavailable | Latin America United States Canada |
| Storage Controller | RAID - RAID RAID 1 - RAID JBOD - RAID RAID 0 | RAID - RAID RAID 1 - RAID JBOD - RAID RAID 0 | ( Thunderbolt ) RAID - RAID RAID 1 - RAID JBOD - RAID RAID 0 | RAID - RAID RAID 1 - RAID JBOD - RAID RAID 0 |
| Storage Controller (2nd) | None | None | None | None |
| Hard Drive | - Thunderbolt technology 2 x 3 TB Standard - Double-safe data protection | 2 x 1 TB Standard | - Portable 2 x 3 TB Hot-swap - Thunderbolt technology - Dual cooling system - Aluminum enclosure | - Thunderbolt technology 2 x 2 TB Standard - Double-safe data protection |
| Hard Drive (2nd) | None | None | None | None |
| OS Required | Apple MacOS X 10.6.8 or later | Apple MacOS X 10.6.8 or later | Apple MacOS X 10.6 or later | Apple MacOS X 10.6.8 or later |
| Manufacturer Warranty | 3 years warranty | 3 years warranty | 3 years warranty | 3 years warranty |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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WD My Book Thunderbolt Duo compare (6TB)
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