OWC ThunderBay 4
RAID 5 Edition
12.0TB 4-bay external drive
Dual Thunderbolt 2 | RAID 5 | 4 Drive Bays | Mac
Performance + Redundancy
- Fits both 2.5" and 3.5" drives
- User configurable in RAID 0, 1, 4, 5 & 1+0
- Up to 558MB/s read / 564MB/s write RAID 5 performance 1
- Exponentially faster rebuild times than hardware RAID
Experience the first and only software RAID 5 technology developed for the Mac with the SoftRAID XT. Empower your workflow with up to 35% faster RAID 5 performance and exponentially faster rebuild times than comparable hardware based RAID arrays.
Activate advanced features, such as drive monitoring, e-mail notifications, and more when you install the included SoftRAID XT for macOS.
Conventional wisdom turned on its head.
Hardware RAID has long been thought to be superior to software RAID, but we've now combined the massive performance and capacity of ThunderBay 4 with a robust, proven software RAID engine to provide breathtaking performance, flexibility, and reliability.
Software RAID + ThunderBay = WHOA!
Over a year ago, OWC partnered with SoftRAID to bring enhanced storage capabilities to the Mac, and we're now seeing that dream become a reality. SoftRAID XT combines advanced RAID modes, fast performance, monitoring, e-mail notification, and fast rebuild capabilities that only software RAID can deliver.
Monitoring + Notifications
SoftRAID XT lets you easily setup drive monitoring and e-mail notifications to keep you informed about your ThunderBay's performance and drive health. Helping you to maintain mission critical workflows.
Better than Hardware RAID Performance
ThunderBay 4 and the SoftRAID engine offers faster performance than many competing 4 or even 5-bay hardware RAID external drives – benefiting from modern processors that are both fast and designed for exceptionally high-performance RAID management with no real-world impact on apps or tasks.
Flexible + Robust
SoftRAID XT is extremely flexible and can easily be updated, reconfigured and used across multiple enclosures to provide an amazing amount of robust options to empower you to make the most of your ThunderBay workflow.
Backed by OWC
Should you ever have a question or troubleshooting need, you can rely on OWC's award-winning U.S. based support for both the ThunderBay 4 drive and SoftRAID XT software.
Empower your workflow with RAID 5 performance and up to 40TB capacity.
Edit, view, stream, and produce more with ThunderBay in your 2K, 4K, and audio production workflow.
The RAID 5 Advantage
RAID 5 merges the four drives inside ThunderBay together for exponential performance gains over a single drive, the combined capacity of three of the drives, and data redundancy that allows the array to still work even if one drive were to fail!
Edit, Experiment, Create, Design
With ThunderBay's performance capabilities you can complete projects faster, have more time to experiment, and push your creations to the next level.
Enhance editing capabilities in video apps like Apple Final Cut Pro, Adobe Premiere, and Avid Media Composer. Empower greater audio production capabilities in audio apps like Avid Pro Tools and Logic Pro X. Edit large photos in apps like Adobe Photoshop, and browse large photo libraries in apps like Apple Aperture and Adobe Lightroom. Simply put, you can do more with a ThunderBay 4 enhanced workflow, and with a RAID 5 array you get data redundancy on top of great performance!
Certified and Tested
Each ThunderBay undergoes OWC's multi-hour drive "burn-in" performance certification procedure prior to shipping. This ensures your ThunderBay arrives operating properly and ready for demanding use.
4 drive bays plus so much more.
Built on OWC's time-tested enclosure cooling technology, ThunderBay utilizes an open "flow-thru" vented design with an oversized 92 mm, low-turbulence, noise-quieting fan to keep the drives running cool and reliably.
Daisy-chain up to six ThunderBays for massive storage capabilities and increased performance, or connect multiple ThunderBays to multiple Thunderbolt 2 ports to achieve exponential speed capabilities.
ThunderBay's drive isolating design reduces sonic resonance, and is aided by over-sized, rugged, vibration-absorbing, non-skid feet.
DisplayPort 1.2 Support
Dual Thunderbolt ports let you connect the display of your choice that your computer can support, including 4K displays.
OWC Thunderbolt Cable
ThunderBay comes with an OWC one-meter certified Thunderbolt cable, with other lengths from 0.5 meter to 30 meters available separately.
1. Read and write speeds of sequential, incompressible data.
JBOD / RAID Support
- JBOD: Utilize each of the four drives independently
- RAID: Use the included software RAID or one of your choice to setup the ThunderBay 4 for multi-drive performance or data redundancy.
- SoftRAID 5 Support Page
*1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment (typically 5-10% less).
The actual total capacity will depend on your own defined file settings/preferences.
**OWC reserves the right to replace or upgrade to equivalent or better components.
Drive Rotation Speed
Drive Cache Size
- 64MB per drive, 256MB total for the solution
- Thunderbolt – (2) Thunderbolt 2 ports
- Comes pre-formatted for SoftRAID and configured as a RAID 5 volume.*
- *If utilizing on a Mac with OS X 10.8.5 or earlier, the SoftRAID software must be installed prior.
Max Data Transfer Rate
- It can be used as a Thunderbolt startup drive on Macs running Mac OS X.
- Any Mac with a Thunderbolt port running OS X 10.9 or later.
- Boot Camp is not supported. The Thunderbolt certification process does not include Macs running Windows through Boot Camp.
- Internal UL Listed U.S./International Auto Switching 100 ~ 240v, 50/60Hz input, 12 Volt 16.66 Amp output Power Supply (power cords for International use sold separately).
External Case Dimensions
- 9.65″(D) x 5.31″(W) x 6.96″(H)
- 245.11mm x 134.87mm x 176.78mm
Enclosure Weight (no accessories)
- Approximately 8.6 pounds (3.9kg)
- (operating) 5°C – 42°C (41°F – 107°F)
- (non-operating) -40°C – 65°C (-40°F – 149°F)
- (operating) 8% – 90% RH (Non-condensing)
- (non-operating) 5% – 95% RH (Non-condensing)
- 65G 2mS; (non-operating) 175G 2mS
- (operating) 1.0G (5 – 300Hz)
- (non-operating) 5.0G (5 – 500Hz)
Manufacturer provided specifications for Other World Computing p/n TB2SRT12.0S UPC#: 812437020564
Includes OWC's award-winning U.S. based support for both the ThunderBay 4 drive and SoftRAID software.
3 Year OWC Solution Limited Warranty
The best warranty is one you never have to use, but should the need occur – OWC is proud to provide a superior level of support and
warranty coverage to our customers. Even when not used, we understand the peace of mind afforded by a longer warranty period. OWC's industry
leading coverage is a testament to our confidence in the reliability of the solutions that we offer. OWC solutions are engineered to demanding
quality standards in order to deliver the most reliable, highest performance available on the market in each storage category.
View more information about the 3 Year OWC Solution Limited Warranty
Note: Do not disassemble or otherwise open your OWC solution prior to the conclusion of the 3 Year OWC Solution Limited Warranty period. Doing so will void the
remainder of the OWC warranty.
SoftRAID 5 for ThunderBay
OWC has partnered with SoftRAID to bring software RAID 5 to the Mac. SoftRAID combines advanced RAID modes,
fast performance, monitoring, e-mail notification, and fast rebuild capabilities that only software RAID can
deliver. ThunderBay 4 models with drives come preconfigured in RAID 5, and are plug and play ready with OS X 10.9 or later.
Advanced features such as drive notification and monitoring require SoftRAID installation.
Click any of the benchmarks below to view the results.
RAID 5 (Stripe with Parity) Test Results
RAID 0 (Stripe) Test Results
" ... great for performance and space. My internal Mac Pro 2013's 512 GB drive has been feeling tight for the past year, and a faster external drive has been something that I have been searching for."
— Paul Solt, iPhoneDev.tv
"OWC unlocks the incredible performance and flexibility of ThunderBay by pairing the drives with a robust software RAID solution."
— Tom Piper, appleJAC
"I turned to my friends at OWC, for solutions ... to efficiently and securely backup, transport, and archive all the data ... ( the ThunderBay 4 RAID) is a lot of storage packed into an eight and a half pound box with dimensions of less than 10"x7"x6"."
— James Mathers, Digital Cinema Society
" ... one of the more affordable four-bay Thunderbolt drives out there. ...performance over a Thunderbolt 2 connection is fantastic."
— Eric Reagan, Photography Bay
"Does great with lots of footage, handles 4K footage with ease ... copying over data is lightning fast, and its's whisper silent ... a terrific Thunderbolt solution"
— Shane Ross, Little Frog in High Def
"The performance is outstanding ... speeds are exceptional ... the Thunderbay itself is an efficient unit that does not get in the way of performance."
— Lloyd Chambers, DigLloyd - Mac Performance Guide
"... an amazing product that can meet the needs of the professional who needs high-performance storage, as well as anyone who is looking for a versatile method of storage and backup."
— Tom Nelson, About.com
"OWC's ThunderBay 4 brings to the market capacities that have yet to be seen in such a compact medium, as well as the performance and data security that only RAID 5 can provide!"
— Les Tokar, The SSD Review
"I remember when I spent $20,000 to buy 20 GB of storage. Now, we can get far more storage, with far better performance, for about $100 per terabyte ... I like what I see ... Congratulations, OWC."
— Larry Jordan, Larry Jordan.Biz
"It's affordable, fast, reliable, and gives any modern Mac access to fast, huge storage ... recommended for video editors"
— Iain Anderson, macProVideo
"Now we can do RAID5 via software and save substantially."
— Allan Tepper, Pro Video Coalition
"The ThunderBay 4 RAID storage isn't just fast, it's superior in performance to everything else in its class."
— Dan East, Layers