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LaCie 2big Thunderbolt™ 2

LaCie 2big Dual Thunderbolt 2

  • Dual-Disk Desktop Hardware RAID
  • Professional performance for 4K workflows.
  • Up to 420MB/s* speeds for 4K video editing
  • Dual Thunderbolt 2 ports for daisy chaining
  • Aluminum enclosure and whisper-quiet fan
  • Connects to a Windows computer via the Thunderbolt connection
  • USB 3.0 for PC and Mac® compatibility


Select capacity:



Thunderbolt 2 Speeds for 4K

 Thunderbolt 2 Speeds for the 4K

With Thunderbolt 2 technology, the interface is no longer the performance bottleneck. For the 2big, LaCie harnessed the breakthrough performance potential of the Thunderbolt 2 I/O, squeezing the absolute best speeds out of the hard disks. Add a hardware RAID controller and 7200RPM disks and the result is incredible, sustained speeds of up to 420MB/s that turbocharge file transfers and backups. With this kind of speed, videographers can edit multiple 2K uncompressed 10-bit streams or play back compressed 4K video. Digital photographers can browse a massive RAW photo library with zero lag. And, thanks to support for Display Port 1.2, it’s now possible to daisy chain higher-resolution displays such as 4K monitors.

Versatility for Professionals

Versatility for Professional Environments

With USB 3.0 and Thunderbolt 2 interfaces, the LaCie 2big gets the best possible speeds on any late-model PC or Mac. And, USB 3.0 backward compatibility means that you can connect the LaCie 2big to any standard computer. With support for exFAT and built-in hardware RAID, you can seamlessly connect to both PC and Mac computers without losing your RAID configuration. Whatever your workstation, move mountains of data – fast. Thunderbolt 2 continues to support daisy chaining of up to six devices to a computer via a single cable (included in the box). This means that professionals can daisy chain up to five LaCie 2bigs plus a 4K display to a computer, bringing capacity, incredible speed, and convenience. Thunderbolt 2 is also backward compatible and uses the same cables and connectors as first-generation Thunderbolt** devices and computers.

RAID for Speed or Security

RAID for Speed or Security

In addition to compatibility with any computer, hardware RAID delivers sustained performance and better reliability. The LaCie 2big’s range of RAID modes also gives you the flexibility to tailor the product to meet your needs. It’s incredibly easy to change the RAID mode, but impossible to do so accidently. You can leave it in RAID 0*** (FAST) mode to maximize speed and capacity for working on current projects, and then move completed projects to archival storage incredibly quickly. Or configure the LaCie 2big in RAID 1 or Mirroring (SAFE) mode, which provides data protection if one disk fails. And thanks to hot-swappable disks, you can simply replace a disk – from the front – with zero data loss and no work interruption. Even in RAID 1, impressive transfer speeds slash the time it takes to perform backups, making it easier to back up more frequently. The LaCie 2big even features JBOD, so you can see and use each disk independently.

Professional Software

Professional Software

With a bundled professional backup software suite and compatibility with Time Machine™ and Windows Backup, the LaCie 2big includes everything you need for secure backup. And with email alerts, busy professionals can monitor their storage before potential problems escalate. This product also includes LaCie Private-Public software, which lets you prevent unauthorized access by password-protecting volumes with AES 256-bit encryption.

Model Number: 9000437UCapacity: 6TB
Model Number: 9000438UCapacity: 8TB
Mode Number: 9000473U
Capacity: 12TB
Internal Storage Media:2 x hot-swappable* 7200RPM/64MB cache (or greater) hard disks
Interface:2 x Thunderbolt? 2 ports
1 x USB 3.0 port (UAS and USB 2.0** compatible)
Interface Transfer Rate:Thunderbolt 2: 20Gb/s
USB 3.0: 5Gb/s
Performance Benchmark:Thunderbolt 2 and USB 3.0:
Reads | Writes (MB/s)***
6TB/8TB RAID 0: 360 | 360
6TB/8TB RAID 1: 170 | 180
12TB RAID 0: 420 | 320
12TB RAID 1: 205 | 200
Interface Technology:Bidirectional 20Gb/s permits a high-resolution display and RAW 4K video playback
Power-Saving Mode:Reduce power consumption by pressing the front button to spin down disks without disrupting daisy chain transfers (short press initiates power-saving mode; long press turns product off completely)
RAID Modes:Preconfigured HFS+ RAID 0
Hardware RAID 0 (FAST) / 1 (SAFE) / JBOD
Easy RAID selection button
Daisy Chain:Connect up to six Thunderbolt-compatible devices including Thunderbolt 2 and LaCie Thunderbolt Series products to a computer via a single Thunderbolt cable**
Security:AES 256-bit software encryption
Kensington lock compatible
Integrated cable lock
Cooling:Aluminum enclosure with improved internal heat dissipation
Thermoregulated Noctua? cooling fan: effective and whisper-quiet cooling
Additional Features:System monitoring and email alerts for failure and warning events Front-facing disk status LEDs
Acousticÿ:Idle mode: 25dB
Operating mode: 26dB
Operating max: 28dB^
Power Supply:100-240V; 50/60Hz; 60W
Dimensions (WxHxD):109 x 130 x 217 mm | 4.3 x 5.1 x 8.5 in.
Weight:3 kg | 6.6 lbs
System Requirements:Computer with a Thunderbolt 2, USB 3.0, Thunderbolt**, or USB 2.0** port
Thunderbolt 2: Latest version of Windows? 7, Windows 8 (see here for drivers information) / Mac OS? X 10.8.5 or later
USB 3.0: Windows XP^^, Windows Vista?, Windows 7, Windows 8, or Mac OS X 10.6 or later
Minimum free disk space: 600MB recommended
Software: Intego Backup Manager Pro for Mac
Genie Backup Manager Pro for PC
LaCie Private-Public (protect data with AES 256-bit encryption)
LaCie Desktop Manager (provides system monitoring and email alerts for temperature or RAID events)ÿ
Download product software at
Box Content: LaCie 2big
External power supply
USB 3.0 cable (USB 2.0 compatible)
Thunderbolt cable
Removable access panel
RAID selection tool
CD with User Manual and software
Quick Install Guide
Comments:* Hot swapping will result in data loss in a RAID 0 array.
** To achieve full interface bandwidth, connect the product to either a USB 3.0 or Thunderbolt 2 port on a computer or device.
*** These transfer rates were achieved using AJA System Test when connected to a 13" Macbook Pro? with a 2.8GHz Intel? Core? i7 processor and 8GB RAM. Actual data rates may vary depending on operating environment and other factors, such as RAID mode, RAID configuration, and disk capacity.