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Silver 12-bay desktop RAID enclosure with six 18TB drives

Promise Technology

Promise Technology PGR12XXXXX18TG RAID controller 108TB 6x18TB Thunderbolt

SKU CH-TKZT-GDF2B MPN PGR12XXXXX18TG

12-bay Thunderbolt RAID array with six 18 TB drives for 108 TB capacity

  • Thunderbolt 4 delivers 40Gbps transfer speed
  • 108 TB raw capacity across six 18 TB drives
  • 12-bay desktop chassis fits up to 240 TB
  • Enterprise 3.5" nearline HDDs with PromiseRAID engine
  • Whisper-quiet intelligent fan control for desktop use

High-capacity RAID storage

The Promise Pegasus R12 is a 12-bay desktop RAID array pre-populated with six 18 TB enterprise nearline hard drives for a total of 108 TB. It uses a hardware PromiseRAID engine and connects via Thunderbolt 4 for 40 Gbps bandwidth. The unit is aimed at creative professionals and small studios that need large, quiet, direct-attached capacity on Mac or Windows workstations.

Host and drive compatibility

Verify that your computer provides a Thunderbolt 4 or Thunderbolt 3 Type-C port with host power delivery sufficient for the enclosure. The system ships with six 3.5-inch drives installed; the remaining six bays accept additional 3.5-inch enterprise nearline HDDs up to 20 TB each. RAID management is handled by the onboard controller, so no host-based software RAID layer is required.

Sustained workload behaviour

Under continuous multi-stream video or large-file transfers the hardware RAID engine maintains consistent throughput without the thermal throttling seen in software-only solutions. Intelligent fan control keeps acoustic output low even when all bays are active, and the compact 12-bay chassis dissipates heat effectively during extended render or backup sessions.

How it compares

Measured against everything we stock in RAID & Drive Controller Cards, at today’s prices. Recalculated every night.

Price $5,359.99
Pricier than about 99% of the 219 comparable items (median $155.99).

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Specifications

Size & build
Shipping weight13.31 kg
Package size467 × 442 × 437 mm

Questions about this item

What drives are included and what must I add to reach the 108 TB capacity?

The unit ships with six 18 TB 3.5" enterprise nearline hard drives pre-installed, giving 108 TB total; no extra drives are needed for that capacity.

Should I choose the 108 TB model or the larger 240 TB option?

The 108 TB version uses six 18 TB drives; the 240 TB maximum uses twelve 20 TB drives, so pick based on how many bays you want to fill now.

What does the 40 Gbps Thunderbolt 4 link mean for real-world throughput?

The 40 Gbps Thunderbolt 4 connection can deliver up to roughly 5 GB/s sequential transfer, limited by the RAID engine and the installed hard drives.

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