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Startech 2 Bay 2.5 to 3.5 SATA HDD Converter |35SAT225S3R

Startech 2 Bay 2.5 to 3.5 SATA HDD Converter |35SAT225S3R

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Dual-Bay 2.5” to 3.5” SATA Hard Drive Adapter Enclosure with RAID

Install two 2.5” SATA drives into a 3.5” drive bay and get increased performance or data redundancy with RAID

Product ID: 35SAT225S3R

  • Upgrade your system performance by installing two 2.5” SSDs/HDDS in a 3.5" drive bay
  • Features hardware RAID - RAID 0, 1 plus JBOD and spanning to enhance drive performance or add redundancy
  • Installs easily into internal or external 3.5” drive bays
  • Supports SATA I, II and III (up to 6Gbps)
  • TRIM support for stable performance
  • Durable aluminum housing

This unique dual-bay adapter enclosure gives you an easy and cost-effective way to upgrade legacy systems such as desktop PCs and servers, by letting you install two 2.5" solid-state drives or hard drives into a single 3.5" drive bay.

Upgrade your system performance

The adapter enclosure lets you install newer, higher performing drives such as SSDs into legacy systems that may only support 3.5” hard drives. The enclosure provides a cost-efficient way for companies and organizations to enhance storage performance and reliability without expensive upgrades to core IT systems. It's also ideal for system administrators and integrators who want to build a system or upgrade a system with limited SATA interfaces to take advantage of the increased drive performance of 2.5” SSDs or increased capacity with support for two drives.

The adapter enclosure allows you to install two 2.5" SATA drives into an internal or external 3.5-inch bay, such as a drive drawer caddy or tray, or 3.5" drive enclosure. To utilize the full speed potential of your SATA III hard drives, the drive converter supports SATA III for transfer speeds up to 6Gbps. Suitable for drives with a height of up to 9.5 mm, virtually any 2.5" SATA drive can be made to look and function like a 3.5" drive.

Enhanced performance and data redundancy with RAID

The adapter enclosure is equipped with hardware RAID to provide improved performance and data redundancy. The enclosure supports both RAID 0 and RAID 1 as well as Spanning, and JBOD, and lets you choose your preferred backup mode by simply adjusting the RAID setting switch.

The RAID 1 functionality is ideal in a hot-swapping server environment, providing a level of security and reliability to your data through data redundancy. With RAID 0 support, you can combine the storage capacity of the two hard drives and achieve faster read and write speeds.

Easy and flexible installation

You can install the adapter enclosure into a desktop PC or server. It offers flexible use in hot-swap bays or in a more fixed, permanent installation in a 3.5” hard-drive mounting bay with standard mounting holes. Once installed, you simply slide two 2.5” HDDs/SSDs into the adapter enclosure, with no tools required. The aluminum housing protects installed drives in a durable enclosure.

The 35SAT225S3R is backed by a 2-year warranty and free lifetime technical support.


  • Upgrade legacy systems such as desktop PCs and servers
  • Build or upgrade a desktop PC or server to take advantage of the increased performance of two 2.5" HDDs or SSDs in a 3.5" drive bay - ideal for system integrators, IT professionals and prosumers
  • Upgrade core IT systems cost-efficiently



Warranty Information
2 Years

Drive Connectors
1 - SATA Data & Power Combo (7+15 pin)

Operating Temperature
0°C to 55°C (32°F to 90°F)
Storage Temperature
-20°C to 55°C (-4°F to 131°F)
5% ~ 65%

Front Door Key Lock
Number of Drives
Drive Size
Compatible Drive Types
Drive Installation
Number of internal 3.5 inch bays
Supported Drive Height(s)
Chipset ID
ASMedia - ASM1092R

LED Indicators
1 - Bay 1 HDD Error

1 - Bay 2 HDD Error

Packaging Information
Package Height
3.6 cm [1.4 in]
Package Length
16.2 cm [6.4 in]
Shipping (Package) Weight
270.0 g [9.5 oz]
Package Width
11.4 cm [4.5 in]
Package Quantity

Maximum Data Transfer Rate
Port Multiplier
Hardware Raid Supported
Supported RAID Modes
RAID 0 (Striped Disks)

RAID 1 (Mirrored Disks)

BIG (Spanning or Concatenation)

JBOD - (Just a Bunch of Disks)

Physical Characteristics
Silver & Black
Aluminum and Plastic
Product Length
14.6 cm [5.7 in]
Product Width
10.2 cm [4.0 in]
Product Height
2.6 cm [1.0 in]
Weight of Product
223.0 g [7.9 oz]

OS Compatibility
OS independent; No software or drivers required

Special Notes / Requirements
TRIM and SMART have limited support while in a RAID configuration. A SATA controller with Port Multiplier support is required, in addition to the product configured in JBOD mode, to provide full TRIM and SMART support.

What's in the Box
Included in Package
1 - dual-bay 2.5" to 3.5" drive converter

4 - mounting screws

1 - quick-start guide
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