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OWC ThunderBay IV Now Available in 20TB Model

PR_ThunderBay4Other World Computing announced the new 20TB capacity for the OWC ThunderBay IV line of four-bay external high-performance storage solutions, one of OWC’s family of Thunderbolt interface storage products.

High-Performance Four-Bay Design

The ThunderBay IV, now available with up to 20TB of total storage, adds tremendous storage capacity and throughput to any Mac or PC with a Thunderbolt port. Applications such as A/V post-production, photography, music, graphics, data management, and even Time Machine backups are enhanced with access to data at sustained data rates of up to 887MB/s read, 884MB/s write.

Flexible for Individual Storage Needs

The ThunderBay IV supports independent drive access of up to four installed drives, is fully RAID ready, and is ideal for software RAID 0, 1, and 5 configurations. Even combinations of RAID, individual drive(s) or multiple RAID sets are possible with OWC ThunderBay IV. 

“The new 20TB capacity of the ThunderBay IV is a real benefit to all users, especially for anyone working with 4K content and its larger capacity needs,” said Larry O’Connor, Founder and CEO, Other World Computing. “Now users can have blazing fast Thunderbolt technology performance and a new option for 20TB of storage space.”

Daisy Chain Capable

ThunderBay’s dual Thunderbolt ports allow daisy chaining of up to five additional devices plus one high-resolution display, for up to 120TB of daisy-chained storage, using the ThunderBay IV solution with any Mac (or PC) via a single available Thunderbolt port.

Solid, Reliable, and Cool

A durable aluminum enclosure protects the four internal drives and keeps them cool thanks to its superior heat dissipation. In addition, the locking faceplate keeps the installed drives secure at all times.

The Perfect Drive for Mac Pro Data Migration

No need to give up the versatility of drive bays when migrating from a Mac Pro tower to the Mac Pro 2013. Simply plug in the ThunderBay IV to a Mac Pro and see four drives with a Thunderbolt interface capable of running all drives at full speed — just as if installed internally. Users will have the speed and power of the Mac Pro, with the drive capacity and flexibility of previous generations, all with the extreme speed of Thunderbolt technology.


The OWC ThunderBay IV is available for immediate ordering from OWC and select retailers in the following configurations:

Your Source for Thunderbolt Interface Upgrades & Accessories

OWC also has available a full line of leading Thunderbolt interface solutions from external drives to drive enclosures, docks, adapters, cables, and more supporting the transition to this great new system.

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  • How would we get a software-based RAID 5 solution? Why not in hardware, like the other 4-bay OWC products?

    • The next version of SoftRAID will offer RAID 5 support. SoftRAID is a great piece of software that offers a lot of beneficial tools for drive health monitoring and verification. Disk Utility, which comes on every Mac OS X installation, offers RAID 0,1, and 10.

      • So is software raid somehow better than a hardware RAID 5 controller?

        BTW. I currently have a 6TB Qx-2 running RAID 5 (love it) and hoping to upgrade to thunderbolt soon.

        • That varies. Hardware RAID is a fairly standardized thing and has certain things it can and cannot do. Software based RAIDs such as SoftRAID allow for a lot more flexibility, but require a small amount of CPU power to manage the RAID. It really depends on which you are looking for.