- What's Included
- Demo Videos
Four-Drive Thunderbolt External Storage Solution with Enterprise Drives and SoftRAID XT
Speed, Flexibility, Convenience
- Flexible: mix and match 3.5-inch or 2.5-inch HDDs and SSDs
- Versatile: two Thunderbolt ports so you can daisy chain up to five additional Thunderbolt devices
- Speedy:up to 1164MB/s peak performance (RAID 0)
- View more: connect up to a 4K display via DisplayPort 1.2
- Easy: offers same functionality and performance with Thunderbolt 3 & 4 machines
- Convenient: built-in power supply eliminates hassle of bulky power brick
- Complete: Includes SoftRAID XT: robust software for creating, monitoring, and managing advanced RAID sets
- 5 Year OWC Limited Warranty
The “Just Right” RAID for All Storage Needs
When two bays clearly aren’t enough storage for your needs and eight bays feels a bit ambitious for now, enter the ThunderBay 4. This “just right” Goldilocks of storage solutions offers the space, speed, and flexibility you can use for both current and future needs.
There’s a reason ThunderBay 4 is our most popular multi-bay RAID storage solution. You can use a variety of 3.5-inch or 2.5-inch drives for everyday digital file storage and backup all the way to running multi-stream compressed 4K video. With two Thunderbolt ports, it gives you the muscle to move all that content.
And ThunderBay 4 is highly configurable to perfectly match your storage needs. You can use each drive independently, or with OWC SoftRAID XT configure your setup with the optimal balance of performance and data-redundancy. Get the most out of your storage, take the brakes off your workflow, and do more with a ThunderBay 4.
Cool. Fast. Empowering.
Each populated ThunderBay 4 solution undergoes OWC's multi-hour drive "burn-in" performance certification procedure prior to shipping. This ensures your ThunderBay 4 arrives operating properly and ready for demanding use. And OWC Enterprise Drive solutions are feature Enterprise class drives with robust technologies that provide maximum drive endurance, data reliability, and extended warranties.
Built on OWC's time-tested enclosure cooling technology, ThunderBay 4 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.
ThunderBay 4s' drive isolating design reduces sonic resonance, and is aided by over-sized, rugged, vibration-absorbing, non-skid feet.
Daisy-chain up to six ThunderBay 4s' for massive storage capabilities and increased performance, or connect multiple ThunderBay 4s' to multiple Thunderbolt 3 ports to achieve exponential speed capabilities.
Gain a 4K Perspective
With a dedicated DisplayPort 1.2, ThunderBay 4 empowers you to add the fresh, crisp perspective of a 4K display to your workflow. Whether in your home office or on a mobile studio job, seeing your work in full detail is just one connection away. Use it to free up your laptop port so you can dock in and out quick.
The “Supply Chain” That Always Delivers
With two Thunderbolt ports, the ThunderBay 4 lets you daisy-chain up to five additional Thunderbolt devices and displays while keeping Thunderbolt ports on your laptop or desktop free for other uses.
SoftRAID: RAID Made Easy
Harness the full capability of your OWC drive array with the included SoftRAID XT, the most powerful, intuitive RAID management software on the market for macOS and Windows. SoftRAID’s RAID creation and management technology has been finely tuned to perfection with over 20 years of development to provide rock solid protection of your data and optimize drive performance.
SoftRAID XT provides an unbeatable combination of speed, protection, and compatibility:
- Advanced: Create RAID 0/1/4/5/1+0 (10) arrays
- Protected: SoftRAID Monitor constantly watches your disks and alerts you if problems are detected
- Validated: Volume validation ensures sectors can be read and parity is correct
- Certified: Checks disks before use to ensure they are safe for data storage
- Vigilant: Error prediction helps protect against unexpected failure
- Universal: Move SoftRAID arrays seamlessly between Mac and PC2 with built-in OWC MacDrive technology
Beyond Hardware RAID
SoftRAID provides a level of storage performance that you simply can’t get with hardware RAID. SoftRAID gives you increased power and control over your RAID drives and disks that hardware RAID can’t deliver and doesn’t lock you into technology that you can’t upgrade or expand.
Workflow and Storage Solutions for Pros
Whether you’re finishing and mastering, creating proxies or working with state-of-the-art VFX and AR, you need dependable tech that keeps pace with your demands. OWC workflow and storage solutions cover every angle, delivering blazing speed, capacity for all five levels of RAID, and bonus features like the freedom to daisy-chain and hot-swap.
Thunderbolt Made Easy
We make it easy to choose the right gear. Our Thunderbolt Certified products offer the same performance and functionality whether they are Thunderbolt 3 or Thunderbolt 4. And if you’re rocking a beloved Thunderbolt 2 machine, we offer an adapter so you can plug into our universe of award-winning solutions. No hassles, no confusion. That’s the OWC Difference.
Number of Bays
Total Solution Cache Size
(4) 8.0TB Toshiba N300 Series 7,200RPM Enterprise Class NAS Hard Disk Drive with 256 MB cache
*OWC reserves the right to replace or upgrade to equivalent or better components.
Plug and Play
Hot Swap Support
SATA 6.0 Gb/s
Default RAID Level
RAID Levels Supported
(1) Host Port - Thunderbolt 3 (USB-C) up to 40 Gb/s (5000 MB/s)
(1) Thunderbolt 3 (USB-C) Port
(1) DisplayPort Port
Data Transfer Rate (Maximum)
Thunderbolt 3 : Up to 40 Gb/s (or 5000 MB/s)
Benchmark Speed, Read (Max)
Up to 1083 MB/s
Benchmark Speed, Write (Max)
Up to 1164 MB/s
SATA Controller: (2) ASM1062
Thunderbolt 3: (1) Intel DSL6540
Contact Start Stops
Host Port Requirements
Thunderbolt (USB-C) port (backward compatible with Thunderbolt 2/Thunderbolt1)
Mac OS Compatibility
macOS 10.12 Sierra
macOS 10.13 High Sierra
macOS 10.14 Mojave
macOS 10.15 Catalina
macOS 11.x Big Sur
macOS 12.x Monterey
macOS 13.x Ventura
macOS 14.x Sonoma
PC OS Compatibility
Windows 10 64-bit Edition
SoftRAID XT works with macOS 10.14 or later and Windows 10 or later. SoftRAID is licensed per computer. The SoftRAID serial number will work with both Mac and Windows but can only be active on one computer at a time. Additional seats can be purchased. RAID 4/1+0 (10) are currently Mac only at this time.
External Power Adapter
Internal UL-listed universal auto-switching power supply
Need an additional power supply? Secondary/replacement power supplies are also available.
(1) 92mm Temperature-controlled cooling fan
Height: 17.7 cm (7.0 in)
Length: 24.5 cm (9.6 in)
Width: 13.5 cm (5.3 in)
Operating: 50°F to 95°F (10°C to 35°C)
Non-Operating: -40°F to 149°F (-40°C to 65°C)
Operating: -304.8 m to 3,048.0 m (-1,000 ft to 10,000 ft)
Non-Operating: -304.8 m to 12,192.0 m (-1,000 ft to 40,000 ft)
Operating: 8% to 90% non-condensing
Non-Operating: 5% to 95% non-condensing
- (1) OWC ThunderBay 4 External Storage Solution
- (1) 0.7M (28") OWC Thunderbolt Cable
- (1) US Power Cable
- (2) Security Keys for Front Panel Lock
- (1) Quick Start Guide for OWC ThunderBay 4 with Thunderbolt 3
- (1) Assembly Manual & User Guide for OWC ThunderBay 4 with Thunderbolt 3
- (1) OWC SoftRAID XT Software Bundle
- (1) Quick Start Guide for OWC SoftRAID XT
- (1) Manual & User Guide for OWC SoftRAID XT
- 5 Year OWC Limited Warranty