Four-Bay Rackmount Thunderbolt Storage, Docking & PCIe Expansion Enclosure
Go Beyond the Desktop with The Most Flexible Storage, Docking, and PCIe Expansion Solution For ANY Rackmount Use
- Drive diversity: use SATA/SAS and U.2/M.2 NVMe drives for up to 128TB of capacity and real-world Thunderbolt speeds up to 2750MB/s
- Drive flexibility: swap drives quickly and easily if/when needed
- Go Maximum: utilize U.2 NVMe SSDs - as well as the OWC ecosystem of U.2 drives and adapters - for incredible speed and flash density per bay
- Includes SoftRAID: robust software for creating, monitoring, and managing advanced RAID sets
- Use it all: connect keyboards, mixers, cameras, displays, and mobile devices such as tablets with (2) USB-C 10Gb/s and (3) USB-A 10Gb/s ports
- See more: connect up to an 8K display to the DisplayPort 1.4 port
- Do more: add a half-length full-height single-width audio/video capture, 10Gb Ethernet, SSD storage, hardware RAID, or I/O card to the PCIe x16 lane (at x4 speed) slot
- Configurable: daisy chain up to five devices or add an additional display with the second Thunderbolt (USB-C) port
- Charge: keep your notebook powered with 85W via the upstream Thunderbolt port
- 1 Year Limited Warranty
The Rackmount Workflow Game-Changer
Since the launch of the OWC ThunderBay desktop storage line in 2014, computer users across the planet have continued to fall in love with it. They embrace its massively powerful RAID capacity and intense performance fueled by time-tested OWC reliability. Its appeal skyrocketed when it was infused with industry-first FLEXibility to create ThunderBay Flex 8.
Now businesses, institutions, studios, and creatives can go beyond the desktop with the OWC Flex 1U4. This innovative 4-bay rackmount solution is ready to fuel your endeavors with the best combination of storage capacity, Thunderbolt transfer performance, drive flexibility, and device expandability. With FLEX in its name, you can count on Flex 1U4 to be your rackmount workflow game-changer.
FLEXible Storage
Drive Diversity
Use SATA/SAS and U.2/M.2 NVMe drives for up to 128TB of capacity and real-world Thunderbolt speeds up to 2750MB/s
Drive Flexibility
Swap drives quickly and easily if/when needed
Get Maximum
Utilize U.2 NVMe SSDs as well as the OWC ecosystem of U.2 drives and adapters for incredible speed and flash density per bay
Powerfully Easy RAID
Create, manage, and monitor advanced RAID sets with OWC SoftRAID
FLEXpandable for Unique Needs
Do More
Add a half-length full-height single-width audio/video capture, 10Gb Ethernet, SSD storage, hardware RAID, or I/O card to the PCIe x16 lane (at x4 speed) slot
Configurable
Daisy chain up to five devices or add an additional display with the second Thunderbolt (USB-C) port
Rack Up Workflow FLEXibility
You’ll turn your expandability and connectivity dreams into reality when you add Flex 1U4 to your rack or cart.
Add up to an 8K display via DisplayPort. And when you have a custom capture, recording, networking, or storage need, Flex 1U4 lets you install a PCIe card to conquer specialized tasks.
Connect mixers, keyboards, cameras, and other gear to your heart’s content as well as charge mobile devices with an ample variety of Thunderbolt and USB ports.
Use a mix of 2.5 or 3.5-inch SATA/SAS and U.2/M.2 NVMe drives with four quick-access, hot-swappable drive bays.
Future Ready
When your workflow needs change, the “FLEXpandability” of the OWC Flex 1U4 easily adapts. Add new drives, connect different devices, and install the PCIe expansion card of your choice – like the OWC 10G Ethernet PCIe Networking Card or the blistering fast OWC Accelsior 4M2 SSD for expanded performance storage capacity. By not locking you into an inflexible, single-task design, the OWC Flex 1U4 extends its useful life and maximizes your investment well into the future.
Ideal for All Rackmount Environments
Flex 1U4 is like a bolt-in productivity supercharger for new or existing rack environments powered by a rack Mac Pro, MacBook Pro, or even a Mac mini. Whether you build your own custom drive and card configuration or select one of our convenient ready-to-run solutions, Flex 1U4 is ideal in a wide variety of settings:

In School
Perfect for taming ever-growing collections of digital files with easy integration and future drive capacity and performance scalability.
At Work
Adds Thunderbolt speed and swappable drives to server closets, server rooms, or colocation center backup capabilities.
On Stage
Handles all the storage and peripheral connectivity needs “front of house” pros require for live performances.
In Studio
Expands storage and connectivity options of fixed racks.
At Home
Great for installers creating a high-performance home entertainment server closet.
A Complete Swap and Share Ecosystem
When you need to move data outside or beyond the local network, Flex 1U4 helps you go with the flow. Thanks to the OWC U.2 ecosystem, moving and sharing data with Flex 1U4 is fast and easy. Swap out and ship a project from field to post in video production workflows. Move backup data to an offline colocation for backup workflows. The combination of Flex 1U4 and the OWC U.2 ecosystem opens a new dimension to data transfer possibilities.
Back row from left to right: OWC Thunderbay Flex 8, and OWC Mercury Helios 3S. Front row from left to right: OWC U.2 NVMe Interchange System and OWC U2 ShuttleOne.
OWC ThunderBay Flex 8Take control of your media workflow with the world’s first 3-in-1 Thunderbolt storage, docking, and PCIe expansion desktop solution. Easily swaps U2 ShuttleOne and U2 Shuttles to/from the Flex 1U4. |
OWC Helios 3S + U.2 NVMe Interchange SystemCreate an external Thunderbolt powered set to post U.2 solution that safeguards your data while lowering shipping costs. |
OWC U2 ShuttleCombine four NVMe M.2 SSDs into the world’s first 3.5-inch U.2 carrier shuttle to create a swappable, massive capacity RAID solution. |
OWC U2 ShuttleOneConvert an NVMe M.2 “blade” style SSD into a swappable 2.5-inch U.2 SSD with the peace of mind that your drive is protected by the full metal, heat dissipating adapter. |
Includes
(1) OWC Flex 1U4
(1) 0.7M Thunderbolt Cable
(1) Rack Mounting Hardware for 19-26" Racks and Cabinets
(1) Quick Start Guide for OWC Flex 1U4
(1) User Guide for OWC Flex 1U4
(1) 3 Years of SoftRAID Premium Access (License located on device)
(1) Quick Start Guide for OWC SoftRAID (Digital)
1 Year Warranty
Specs
Drive Bays
4 bays supporting: 2.5-inch SATA HDDs, 2.5-inch SATA SSDs, 3.5-inch SATA HDDs, 3.5-inch SATA SSDs, 2.5-inch U.2 SSDs, 3.5-inch U.2 SSDs, M.2 SSDs (with M.2 to U.2 adapter), 2.5-inch SAS HDDs (with SAS drive controller card), 2.5-inch SAS SSDs (with SAS drive controller card), 3.5-inch SAS HDDs (with SAS drive controller card), 3.5-inch SAS SSDs (with SAS drive controller card)
Bays 1-2 each support x4 lanes PCIe, bays 3-4 each support x1 lane PCIe
Plug and Play
Yes
Hot Swap Support
Yes
Hot Plug Support
Yes
Boot Support
Boot Camp is not supported.
Expansion Slots
(1) Full-height, half-length, single width PCIe 3.0 x16 slot (physical) at x4 speed
Device Ports
(1) Host Port - Thunderbolt 3 (USB-C) up to 40Gb/s (5000MB/s)
(1) Thunderbolt 3 (USB-C) Port
(2) USB 3.2 Gen 2 Type-C Ports up to 10Gb/s (1250MB/s) - USB 2.0/3.0 backwards compatible
(3) USB 3.2 Gen 2 Type-A Ports up to 10Gb/s (1250MB/s) - USB 2.0/3.0 backwards compatible
(1) DisplayPort Port
Power Delivery
One Thunderbolt 3 port with 85W power delivery
One Thunderbolt 3 port with 15W power delivery
Two USB-C ports with 15W power delivery
Display Support
Up to two 4K displays @ 60Hz,
or one 8K display @ 60Hz,
or one 4K display @ 120Hz,
or one 5K display @ 60Hz
Display Support by Port
Thunderbolt 3 (Titan Ridge): Up to 8K @ 60Hz or 4K @ 120Hz via a native Thunderbolt 3 display or other display that supports USB-C connections and DisplayPort 1.4
DisplayPort 1.4: Up to 8K @ 60Hz or 4K @ 120Hz

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