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OWC ThunderBay 4
RAID 5 Edition

16.0TB 4-bay external drive

Refurbished | Excellent Condition

Dual Thunderbolt 2 | RAID 5 | 4 Drive Bays | Mac
Performance + Redundancy
  • Four 3.5" drive bays for up to 32TB
  • User configurable in RAID 0, 1, 4, 5 & 1+0
  • Up to 530MB/s read / 528MB/s write RAID 5 performance.
  • Up to 723MB/s read / 711MB/s write RAID 0 performance.
  • Exponentially faster rebuild times than hardware RAID.
Experience the first and only software RAID 5 technology developed for the Mac with the ThunderBay 4 RAID 5 Edition. 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 5 XT for OS X.

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 5 XT combines advanced RAID modes, fast performance, monitoring, e-mail notification, and fast rebuild capabilities that only software RAID can deliver.
Monitoring + Notifications
Software RAID easily lets you 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 5 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 5 XT software.

Empower your workflow with RAID 5 performance and up to 32TB 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.
Time-tested Cooling Time-Tested Cooling
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.
Multi-Drive Multi-Drive
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.
Vibration Dampened Vibration Dampened
ThunderBay's drive isolating design reduces sonic resonance, and is aided by over-sized, rugged, vibration-absorbing, non-skid feet.
DisplayPort 1.2 DisplayPort 1.2 Support
Dual Thunderbolt ports let you connect the display of your choice that your computer can support, including 4K displays.
Thunderbolt Cable 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.

Includes

Gallery

Product Specifications

Chipset

  • Thunderbolt 2

Interfaces Supported

  • Thunderbolt 2

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

Standard Mechanism

4.0TB Toshiba MD04ACA400 Specifications:

Specifications

Form Factor
3.5″ HDD
Interface
SATA 6.0Gb/s
Capacity1
4.0TB
Formatted Capacity2
3720GiB
Rotational Speed
7,200 RPM
Cache / Data Buffer
128MB
Manufacturer Model Number
MD04ACA400
Format

Physical

Height (max)
26.1mm (1.027″)
Width (max)
101.6mm (4.0″)
Length (max)
147mm (5.787″)
Weight (typical)
720g (1.587 lbs.)
Bytes per Sector
512 / 4096

Reliability3

MTBF (Mean Time Between Failures)
1,400,000 hours
Load/Unload
600,000 times
Warranty
2 Year Toshiba Limited Warranty

Performance

Transfer Rate (Max)
6.0Gb/s
Average Seek Time
8.5ms
Average Latency
4.17ms

Power

Read Power
11.3 Watts
Write Power
11.3 Watts
Idle Mode
6.0 Watts

Environmental (Operating)

Shock
70 G max at 2ms
Ambient Temperature (°F)
32°F to 140°F
Ambient Temperature (°C)
0°C to 60°C
Vibration
0.75 G (5 to 500 Hz)
Relative Humidity (non-condensing)
8% to 90%
Altitude
-304.8 m to 3,048 m (-1,000 ft to 10,000+ ft)

Environmental (Non-Operating)

Shock
300 G max at 1ms
Ambient Temperature (°F)
-40°F to 158°F
Ambient Temperature (°C)
-40°C to 70°C
Vibration
1.04 G (5 to 500 Hz)
Relative Humidity (non-condensing)
5% to 95%
Altitude
-304.8 m to 12,192 m (-1000 ft to 40,000+ ft)

Acoustics

Idle (Typical)
3.1 bels
  1. 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.
  2. In terms of standard gigabytes, 1GiB ≈ 1.074GB and refers to the actual formatted capacity of shown under Mac OS 10.5 or earlier and Microsoft Windows OS.
  3. Specific application environments such as temperature and duty cycle will affect the overall reliability rates.
  • 4 x 4.0TB* Toshiba MD04ACAxx Series Enterprise Hard Disk Drives**

  • *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

  • 7200 RPM

Drive Cache Size

  • 256MB Total (64MB x 4 HDDs)

Port Configuration

  • Thunderbolt – (2) Thunderbolt 2 ports

Format

  • 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

  • Thunderbolt 2 – 20Gb/sec

Port/Interface Bootability

  • It can be used as a Thunderbolt startup drive on Macs running Mac OS X.

System Requirements

  • 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.

Software Included

Power Supply

  • 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)

Product Manual

Operating Environment:

Temperature

  • (operating) 5°C – 42°C (41°F – 107°F)
  • (non-operating) -40°C – 65°C (-40°F – 149°F)

Relative Humidity

  • (operating) 8% – 90% RH (Non-condensing)
  • (non-operating) 5% – 95% RH (Non-condensing)

Shock

  • 65G 2mS; (non-operating) 175G 2mS

Vibration

  • (operating) 1.0G (5 – 300Hz)
  • (non-operating) 5.0G (5 – 500Hz)

Support

Includes OWC's award-winning U.S. based support for both the ThunderBay 4 drive and SoftRAID software.

Manufacturer provided specifications for Other World Computing p/n TB2SRT16.0 UPC#: 812437020571

Software

SoftRAID
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.

Reviews

Customer Ratings

Write a Review 4.4 / 5 4 out of 5 (80%) reviewers would recommend this product
Verified Buyer
Reviewer: abaggy Location: Henderson, NV Age: 55-65 Experience Level: Power User Owned Product: 3-4 months
Rating: 5/5 Solid RAID unit September 11, 2020 I bought this unit to replace an old RAID unit that had a proprietary formatting and wasn't compatible with any of the standard formats. This unit took my existing HD's without a hiccup, formatted the units and now I have a lightning quick RAID 5 unit. I haven't had any issues streaming video from it or transferring files between other drives. The Thunderbolt 3 interface is FAST!

I would recommend this item to a friend! This review is from OWC ThunderBay 4 RAID 5 4-Bay External Storage Enclosure with Dual Thunderbolt 3 Ports. Customer Videos:

Verified Buyer
Reviewer: Pavonia Location: Washington
Rating: 5/5 Great drives May 6, 2019 Outgrew my Western Digital hard drives and needed a big, safe, fast drive. Found OWC ThunderBay drives and not looking back. This is my second one. Equipment is super solid and support staff is fantastic. No need to look anywhere else.

I would recommend this item to a friend! This review is from 16TB OWC ThunderBay 4 RAID 5 4-Drive HDD External Storage Solution with Dual Thunderbolt 3 Ports. Customer Videos:

Verified Buyer
Reviewer: daver Location: Plano, Texas Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 4/5 Excellent choice July 25, 2018 This is my second ThunderBay 4 so that must say something. The other (with ThunderBolt 2) has been in constant use 24/7 for several years without out a single error. Which is why I bought another one with Thunderbolt 3. With four 4TB 7200 RPM HGST disks it is blazingly fast and provides enough storage for my image and video editing.

I had one slight problem with a RAID 0 volume mixed in with two RAID 5 volumes. I like to create a RAID 0 scratch volume to provide scratch and cache space for all of my photo/video tools. For some reason this particular system combination (hardware, software, disks)does not like this combination. My other ThunderBay 4 is fine with this config. So I whacked the RAID 0 volume and made it RAID 5 and all is well. Support is supposedly looking into this.

I would recommend this item to a friend! This review is from OWC ThunderBay 4 RAID 5 4-Bay External Storage Enclosure with Dual Thunderbolt 3 Ports. Customer Videos:

Verified Buyer
Reviewer: Scoob Location: Los Angeles Age: 35-44 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Works well with my Mac server May 29, 2018 Purchased it to use my Mac mini server as a replacement for an older NAS. It worked right out of the box. Setting up the partitions was easy. So far, it's been great.

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: Jigbobby Location: Western Washington Age: 55-65 Experience Level: Hobbiest Owned Product: less than a month
Rating: 4/5 A screamer, but somewhat noisy April 23, 2018 This unit is fantastically fast. Make no mistake about that. It transfers files faster than you can imagine, compared to other interfaces. It's reliable, and the software included does a great job of keeping everything in order. But if you are adding this to a new Mac, be aware that the new High Sierra OS on an iMac Pro prevents the included software from installing properly. You have to visit the Software manufacturer's website ( SoftRAID) for instructions on how to properly install it. If you don't do this problems will arise and you will likely find your data damaged and your disks having to be rebuilt which takes forever. done properly, though, this machine is stable, extremely fast, and generally goes un-noticed while doing its thing. Except for the noise. With a normal PC with spinning hard drives, this box would likely not be heard. But with an iMac or iMac Pro, it sounds loud and somewhat annoying. I almost returned it because of that, but its just too good at it's job to replace.

I would recommend this item to a friend! This review is from 12TB OWC ThunderBay 4 RAID 5 4-Drive HDD External Storage Solution with Dual Thunderbolt 3 Ports. Customer Videos:

Verified Buyer
Reviewer: Seanocaster Location: Dubai, UAE Age: 25-34 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Thunderbay 4 with RAID 5 March 7, 2018 This is the second one of these that i've purchased - the first being about 3 years ago. I have been very happy with the performance and reliability so this was a no brainer for me when i needed another one.

I now have 2 on my desk, one for personal use and one for photo/video professional use.

This review is from OWC ThunderBay 4 RAID 5 4-Bay External Storage Enclosure with Dual Thunderbolt 3 Ports. Customer Videos:

Verified Buyer
Reviewer: mcreative
Rating: 4/5 Thunderbolt 3 Raid enclosure that meets expectations February 22, 2018 Just received the product and placed four 7200rpm HDD that I had available into it. After installation, the SoftRAID XT software (that I had to find and download - not as easy as the included pamphlet led me to believe) told me that one of my HDDs would fail sooner than later and to replace it. I replaced the problematic drive and the machine has been running flawless ever since (about a month now). I would give the hardware 5 stars but the SoftRAID XT software was 3 stars due to the challenge finding the right version and installing the serial number from the bottom of the hardware.

I would recommend this item to a friend! This review is from OWC ThunderBay 4 RAID 5 4-Bay External Storage Enclosure with Dual Thunderbolt 3 Ports. Customer Videos:

Response from MacSales.com, Call Center February 23, 2018 Hello! I'm very sorry about any issues you experienced finding and downloading SoftRAID. The current version of SoftRAID will always be available for download here: https://www.softraid.com/pages/support/download_latest_version.html and SoftRAIDXT here: https://www.softraid.com/pages/support/softraidxt.html
OWC 16.0TB ThunderBay 4 - RAID 5 Edition Mfr P/N: TB2SRT16.0 OWC SKU: OWUTB2SRT16.0R High-Performance 4-bay External Drive 1 Year OWC Limited Warranty
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