8.0TB OWC ThunderBay 4 mini
Four-Drive Thunderbolt 2 External Storage Solution with SoftRAID Lite XT
Mfr P/N: TB4MJB08T5 OWC SKU: OWCTB4MJB08T5
The Perfect Combination of Speed, Size, and Convenience for Permanent Access to Your Data
- Four 2.5-inch drive bays
- Up to 1346 MB/s with (2) Thunderbolt 2 ports (Thunderbolt 2/Thunderbolt backward compatible)
- Daisy-chain up to five additional Thunderbolt devices
- Includes SoftRAID: robust software for creating, monitoring, and managing advanced RAID sets
- Thunderbolt certified for Mac and Windows
- 3 Year OWC Limited Warranty
Big RAID System Performance in a Compact Design
A New World of Drive Use Flexibility
Install or Swap in Minutes
Store More, Go Faster
Includes SoftRAID: Easy and Complete Drive Management
- Flexible: create RAID 0 and 1 volumes with SoftRAID Lite XT (Windows and Mac)
- Advanced: create RAID 0, 1, 4, 5, 1+0 (10) volumes (RAID 6, 6+ coming soon) and get email notifications for drive and RAID volume health with SoftRAID (Mac only)
- Verify: volume validation ensures sectors can be read, parity is correct, and any potential volume failure is minimized
- Certified: drives are validated before use to ensure they are safe for data storage
- Vigilant: predictive warnings help protect against unexpected drive failure
- Cross-platform ready: SoftRAID Lite includes built-in MacDrive technology that lets you read/write SoftRAID RAID 0 and RAID 1 arrays and use them interchangeably with Windows and macOS computers
- Outperforms: up to 86% faster than AppleRAID
- Thorough: full TRIM support improves internal and external SSD performance in all RAID levels
- Risk-free: 30-day free trial of fully functional application
Professional Grade = Ready to Work
Support You Can Trust
Includes
- (1) OWC ThunderBay 4 mini External Storage Solution
- (1) 1.0M (39") Thunderbolt 2 Cable
- (1) External Power Supply
- (1) US Power Cable
- (2) Security Keys for Front Panel Lock
- (1) Quick Start Guide for OWC ThunderBay 4 mini with Thunderbolt 2
- (1) Assembly Manual & User Guide for OWC ThunderBay 4 mini with Thunderbolt 2
- (1) OWC SoftRAID Lite XT Software Bundle
- (1) Quick Start Guide for OWC SoftRAID Lite XT
- 3 Year OWC Limited Warranty
Specs
Drive Bays
- 4 bays supporting: 2.5-inch SATA drives
Capacity
- 8.0TB
Total Solution Cache Size
- 512 MB
Drive Mechanism
- (4) 2.0TB Toshiba MQ04AB Series 5,400RPM Hard Disk Drive with 128 MB cache
- *OWC reserves the right to replace or upgrade to equivalent or better components.
Hot Swap Support
- Yes
Hot Plug Support
- Yes
Boot Support
- Independent volumes bootable in macOS.
Storage Interface
- SATA
RAID Capable
- Yes
Default RAID Level
- RAID 0
RAID Levels Supported
- RAID 0
- RAID 1
- JBOD
RAID Features
- Software RAID
Device Ports
- (1) Host Port - Thunderbolt 2 up to 20Gb/s (2500MB/s) - Thunderbolt 1 backwards compatible
- (1) Thunderbolt 2 Port
Data Transfer Rate (Maximum)
- Thunderbolt 2 : Up to 20Gb/s (or 2500MB/s)
- Thunderbolt : Up to 10Gb/s (or (1250MB/s)
Chipset / Controller
- Thunderbolt 2: Intel JHL5520
- SATA Controller: ASMedia ASM-1062
Host Interface Requirements
- Thunderbolt 2 (mDP) port (backwards compatible with 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
PC OS Compatibility
- Windows 7 32-bit Edition
- Windows 7 64-bit Edition
- Windows 8 32-bit Edition
- Windows 8 64-bit Edition
- Windows 8.1 32-bit Edition
- Windows 8.1 64-bit Edition
- Windows Server 2012
- Windows 10 32-bit Edition
- Windows 10 64-bit Edition
- Windows Server 2019
- Windows Server 2016
- Windows Server 2022
- Windows 11
Driver Required
- SoftRAID Only
Other Requirements
- Requires macOS 10.12.6 or later.
- Will work with Thunderbolt (10Gb/s) Mac models, but data transfer will be limited to 10Gb/s.
- SoftRAID works with macOS 10.14 or later and Windows 10. M1 Macs require macOS 11.3 or later. SoftRAID is licensed per computer.
External Power Adapter
- Yes
Power Supply
- External UL-listed universal auto-switching power supply
AC Input
- 100-240V, 50-60Hz, 2.0A
DC Output
- +12V, 6A
Wattage
- 72W
Cooling
- (1) 60mm cooling fan
Security Slot
- Yes
Power/Activity LED
- Yes
Housing Color
- Black
Housing Material
- Aluminum
Dimensions
- Height: 11.7 cm (4.6 in)
- Length: 19.1 cm (7.5 in)
- Width: 9.6 cm (3.8 in)
Weight
- 1.6 kg (3.55 lbs)
Certifications
- CE
- FCC
- VCCI
- RCM
- BSMI
Country of Origin
- China
TAA Compliance
- No
Ambient Temperature
- Operating: 41°F to 95°F (5°C to 35°C)
- Non-Operating: -4°F to 140°F (-20°C to 60°C)
Altitude
- 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)
Humidity
- Operating: 8% to 90% non-condensing
- Non-Operating: 5% to 95% non-condensing
Noise
- 24.0dB
- When connected to a Thunderbolt (10Gb/s) host, data transfer will be limited to 10Gb/s.
Benchmarks
Truth in Numbers: Another OWC Difference
There are many attributes that define “The OWC Difference.” By listing real-world performance tests of OWC solutions, we’re confident you’ll be completely satisfied with your technology investment.
macOS RAID 0 Test Results
Blackmagic Disk Speed Test
Thunderbolt 2

AJA System Test
Thunderbolt 2

Videos
Learn More
Customer Reviews
During September purchase of an OWC 14-Port Thunderbolt Dock, OWCTB3DK14PSG, to use with my MacBook M3 and a ThunderBay 4 Mini, OWCTB4MJB000, for long-term and safe storage my 300+ ripped DVD movie collection (among other things, backups etc…) My knowledge of Thunderbolt connectors and drive enclosures was very limited. So a considerable amount of time was spent on the OWC website researching both. What I did grasp, along with my budget and storage needs, led me to the ThunderBay 4 Mini. After looking at the photos and watching the video on its product page, I decided to purchase it. I’ve just recently procured the SATA SSD drives for the enclosure, installed them to begin transferring my DVD collection only to find that the Thunderbolt connectors and cable that came with my ThunderBay 4 Mini are not compatible with my new Thunderbolt 14 Dock or MacBook Pro. They certainly weren’t the connectors in the ThunderBay 4 Mini video I watched on its product page. I’m disappointed to learn the ports on my new ThunderBay 4 Mini are not the Thunderbolt C ports shown in the video but older technology Thunderbolt ports, known to me as Apple display ports. To use my new ThunderBay I’ll need to purchase two adapters, although the website is unclear so I’m not sure if I need the ones that are $47.88 each or $64.99 each. I purchased a new drive bay with old technology and now have to spend an additional $100 to $150 for adapters because the information on the OWC website is unclear. This was a bad purchase so I’m forced to look for a different enclosure and take the loss. I was accustomed to better from OWC.
- Reviewer:JerryGia
This unit works fine, but beware connectivity hassles. Unless you're quite familiar with Thunderbolt form factors, you may not realize that Thunderbolt 2 cables are physically incompatible with later versions of Thunderbolt. You will almost certainly need a Thunderbolt 2 -> 3 (USB-C) adapter, which will cost you about $50 from Apple. It's not clear to me why OWC is selling units with this connection type, as Thunderbolt 3 came out in 2016, but here we are.
I would recommend this product to a friend!
- Reviewer:info-99525
Thank you so much for sharing your thoughts! We're thrilled to hear that the unit is working well for you. We completely understand the confusion around Thunderbolt cables, and we appreciate you bringing that to everyone's attention. It's true that Thunderbolt 2 and Thunderbolt 3 have different connections, and we always recommend checking compatibility before purchasing. Your feedback is invaluable, and it helps us improve the experience for all our customers! Happy computing!
horrible. I can't connect it to your dock. I have ordered adapters and cables, but nothing connects. I can't connect to your my new Mac mini. It was a waste of money.
- Reviewer:Reviewer3299512718
Thanks for sharing your candid feedback with us. We're sorry about the issues you're having with the ThunderBay We will have someone reach out to to look into this further with you.