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Silver 1U metal rackmount chassis with four front drive bays and three small fans

TERRAMASTER

TERRAMASTER D4-320U 4-Bay 1U Rackmount USB 3.2 Gen2 Drive Enclosure

SKU CH-J45G-PH132

A 1U rackmount USB 3.2 Gen2 enclosure holding four SATA drives for up to 120 TB with 10 Gbps transfers

  • External InterfaceUSB 3.2 Gen2
  • MaterialMetal
  • Fan40 x 40 x 20mm 3pcs

Model 4 Bay D4-320U USB 3.2

Les versions barrées existent, mais ne sont pas disponibles ici.

  • 1U rackmount fits standard racks without rails
  • USB 3.2 Gen2 delivers up to 10Gbps transfer speed
  • Four drive bays support up to 120TB total capacity
  • Plug-and-play operation on Windows, macOS and Linux
  • Three built-in fans keep drives cool during heavy workloads

Compact 1U 4-bay DAS

The TerraMaster D4-320U is a 1U rackmount direct-attached storage enclosure that holds four SATA drives. It connects via USB 3.2 Gen2 Type-C at up to 10Gbps and includes both Type-C and Type-A cables. The metal chassis measures 241mm deep and weighs 3.2kg, fitting standard racks without rails. It operates diskless and requires no drivers for Windows, macOS or Linux.

Suits single-disk expansion, not hardware RAID

This enclosure suits users who need to add up to four individual SATA volumes to a workstation, server or compatible TerraMaster NAS running TOS 5.1 or later. Each bay accepts 3.5in or 2.5in drives up to 30TB, yielding 120TB total raw capacity. It does not suit buyers who want onboard RAID levels, hardware encryption or multi-host connectivity, because the unit presents each drive separately to the OS.

USB 3.2 Gen2 10Gbps host link

The single specification that decides fit is the USB 3.2 Gen2 interface delivering up to 10Gbps bandwidth. With four hard drives installed, sequential throughput reaches 1016MB/s; a single SATA SSD tops out at 510MB/s. Thunderbolt 3, 4 and 5 hosts are supported through the same Type-C port, but the enclosure itself remains a USB device.

Points forts

  • 1U rackmount fits standard racks without rails
  • USB 3.2 Gen2 delivers up to 10Gbps transfer speed
  • Four drive bays support up to 120TB total capacity
  • Plug-and-play operation on Windows, macOS and Linux
  • Three built-in fans keep drives cool during heavy workloads

Caractéristiques

BrandTerraMaster
SeriesUSB Enclosure
Model4 Bay D4-320U USB 3.2
External InterfaceUSB 3.2 Gen2
MaterialMetal
Fan40 x 40 x 20mm 3pcs

Autres versions de ce modèle

2 de plus dans cette gamme

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Questions sur cet article

What drives must I already have to populate the four bays?

You need up to four 3.5" or 2.5" SATA hard drives or SSDs, each up to 30TB, for a maximum of 120TB total.

Will my existing TerraMaster NAS recognise the enclosure over USB?

Yes, with TOS 5.1 or later the D4-320U connects via USB to expand storage pools and create arrays through the NAS operating system.

How can I verify the enclosure is delivering the stated transfer performance?

With four drives installed, read/write speeds can reach 1016MB/s; a single SSD can achieve up to 510MB/s read speed over the USB 3.2 Gen2 link.

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