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PROMISE PegasusR4i
Custom-Designed for the Mac Pro

PROMISE PegasusR4i

Sorry, this product is no longer available, please contact us for a replacement.

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Custom-Designed for the Mac Pro
The Power of Promise Pegasus Storage, Now Inside the Mac Pro.

Internal Storage Options for Mac Pro – PROMISE Pegasus R4i RAID Storage MPX Module- to conveniently store and speedily access upto 32TB of data over internal buses.

  • Developed by Promise for Apple
  • Fine-tuned for Mac Pro & macOS Catalina
  • Legendary PROMISE Engineering, Quality & Support


  • Elegant and rugged chassis designed uniquely to fit into Mac Pro’s MPX slots
  • Plug & Play with built in driver in macOS
  • Four swappable modules with 8TB 7200rpm SATA HDDs pre-formatted and pre-installed
  • Best-in-class Pegasus hardware RAID an optimal combination of capacity, redundancy and performance with up to 680 MB/s in RAID5
  • Promise Pegasus Utility for simple-to-use but powerful storage management and monitoring

These custom-designed systems allow for easy installation and work flawlessly within the new Mac Pro and macOS Catalina. They come with a 3-year hardware warranty and are supported by Promise’s dedicated global support team. Additional capacities and configurations should be available soon.


Capacity 32TB raw
Form Factor Full height MPX Module for Mac Pro
Interface MPX connector for Mac Pro
Storage Devices Four SATA3 7200 rpm 8TB HDDs, preformatted HFS+
RAID Preconfigured RAID5 Supports RAID levels 0, 1, 5, 6, 10, JBOD
Dimensions 337 x 164 x 80 mm (13.3 x 6.5 x 3.2 inch)
Weight 4.2 kg / 9.2 lb (with 4 HDDs)
Warranty 3-Year hardware warranty, global support


Download the PROMISE Pegasus R4i/ J2i Datasheet (PDF).

Pricing Notes: