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Black metal tray holding two 2.5 inch SATA drives in a 3.5 inch bay

Qnap

Qnap QDA-A2AR 2.5 to 3.5 SATA security adapter

SKU CH-TN1E-85YXK MPN QDA-A2AR

Holds two 2.5-inch SATA drives in one 3.5-inch bay with RAID 0, RAID 1 or JBOD modes

  • Weight1
  • Fits two 2.5 SATA drives into one 3.5 bay
  • Hardware RAID switch for individual, JBOD, RAID 0 or RAID 1
  • No driver needed for Windows, Linux or QNAP NAS
  • Supports 2.5 drives from 7 mm to 9.5 mm height
  • Up to 6 Gb/s transfer speed per drive

Dual 2.5-inch SATA in one 3.5-inch bay

The Qnap QDA-A2AR lets you install two 2.5-inch SATA drives inside a single 3.5-inch SATA drive bay. It works with PCs running Windows or Linux and with QNAP NAS units without needing a software driver. The adapter can serve as a primary bootable device for a PC. Drives are sold separately.

Metal drive trays and hardware RAID switch

Each 2.5-inch drive sits in a metal tray that slides into the 3.5-inch frame, securing drives from 7 mm to 9.5 mm high. A bundled metal pin acts as a hardware switch to select Individual, JBOD, RAID 0 or RAID 1 modes without software configuration. Windows users can monitor RAID status and disk health through the QNAP External RAID Manager utility.

Check SATA port multiplier support and drive height

Verify that your host SATA controller supports port multipliers if you plan to use Individual mode with two separate volumes. Confirm your 2.5-inch SATA drives are between 7 mm and 9.5 mm high so they fit the trays. Ensure you have a free 3.5-inch SATA drive bay and matching data and power cables for the adapter.

Highlights

  • Fits two 2.5 SATA drives into one 3.5 bay
  • Hardware RAID switch for individual, JBOD, RAID 0 or RAID 1
  • No driver needed for Windows, Linux or QNAP NAS
  • Supports 2.5 drives from 7 mm to 9.5 mm height
  • Up to 6 Gb/s transfer speed per drive

Specifications

BrandQnap
Weight1
Shipping weight0.91 kg
Package size305 × 254 × 229 mm

Questions about this item

What SATA interface speed does the QDA-A2AR support for 3.5-inch drives?

The adapter supports up to 6 Gb/s transfer speeds on the 3.5-inch SATA connection.

What drive heights can the QDA-A2AR accommodate in its 3.5-inch bay?

It fits two 2.5-inch SATA drives measuring 7 mm to 9.5 mm in height.

How do I change the RAID mode on the QDA-A2AR, and what step is often missed?

Use the included metal pin to move the disk mode switch; the step often missed is setting the mode before inserting the drives and powering on.

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