Dual Bay 5.25" Trayless Hot Swap Mobile Rack Backplane for 2.5" and 3.5" SATA/SAS HDD or SSD with Fan

Easily connect and hot swap dual 2.5” and 3.5” SATA/SAS hard drives from a 5.25” bay

Product ID: HSB2535SATBK

3 stars (4 reviews) |
  • Individual 2.5" and 3.5" drive trays
  • Complies with 5.25" small form factor specification
  • Trayless design for hot swap support

The HSB2535SATBK Removable 2-drive backplane lets you quickly install and hot-swap drives from the front of your computer, by turning a 5.25" bay into a hot-swappable SATA/SAS interface for you to connect a 3.5” SATA hard drive (HDD) and/or a 2.5” SATA hard drive or solid state drive (SSD).

The hard drive bay interfaces with SATA/SAS, offering two trayless hard drive bays and can be mounted into any 5.25" front bay, to provide a hot-swappable mobile rack. The bays feature ejection levers which allow drives to be installed and removed quickly from the computer system, providing a convenient way to create backups that can then be removed for safekeeping, archiving, or external portable access.

For added versatility the backplane provides support for both SATA and SAS interfaces, an ideal accommodation for enterprise system integration. Plus, to help prevent drive failure, the bay provides excellent heat dissipation with a built-in fan and slotted aluminum enclosure.

The HSB2535SATBK is backed by a StarTech.com 2-year warranty and free lifetime technical support.


  • Imaging - For System Builders or configuring new systems - Use Hot Swap Bay in master system to copy Windows OS quickly to multiple blank hard drives as part of system building process
  • Add a hot-swap bay to a server or workstation computer, for a removable backup solution
  • Create a hybrid storage solution with a solid state drive for speed, and a standard hard drive for larger storage capacity like hyperduo
  • IT environments where you need to quickly insert/replace hard drives with no external HDD enclosure required

The StarTech.com Advantage

  • Wide compatibility for system integration with support for SATA and SAS drive interfaces
  • Optimum drive operating temperatures, with built-in cooling fan
  • Maximize storage space, with two hard drives in a single 5.25" bay

Partner Numbers

  • Ingram Micro Belgium 2536914
  • UPC 065030853668


  • OS Independent logo
OS independent; No software or drivers required


Warranty Information Warranty 2 Years
Connector(s) 2 - Drive Connectors SFF-8482 (29 pin, Data & Power, Internal SAS)
2 - Host Connectors SATA (7 pin, Data)
1 - Host Connectors LP4 (4 pin; Large Drive Power)
Environmental Operating Temperature -5°C to 35°C (23°F to 95°F)
Storage Temperature -20°C to 50°C (-4°F to 122°F)
Humidity 20%RH ~ 80%RH
Hardware Interface SATA
Front Door Key Lock Yes
Number of Drives 2
Drive Size 2.5in & 3.5in
Compatible Drive Types SAS & SATA
Drive Installation Removable
Number of 2.5 inch bays 1
Number of internal 3.5 inch bays 1
Fan(s) Yes
1 - Fans 50 mm
Fan Bearing Type Ball Bearing
Indicators 1 - LED Indicators 2.5" HDD/SSD Activity LED
3.5" HDD Activity LED
Packaging Information Package Height 5,4 cm [2,1 in]
Package Length 17,4 cm [6,9 in]
Shipping (Package) Weight 0,7 kg [1,5 lb]
Package Width 22,0 cm [8,7 in]
Performance Maximum Data Transfer Rate 6 Gbit/s
Type and Rate SATA III (6 Gbps)
Max Drive Capacity Currently tested with up to 4TB 7200 RPM hard drives (3.5")
Currently tested with up to 1TB 7200 RPM hard drives (2.5")
Insertion Rating 10,000
Physical Characteristics Weight of Product 0,5 kg [1,2 lb]
Product Length 14,8 cm [5,8 in]
Product Width 18,3 cm [7,2 in]
Product Height 4,2 cm [1,7 in]
Software OS Compatibility OS independent; No software or drivers required
What's in the Box 1 - Included in Package 2.5/3.5in SATA HDD Backplane
LP4 to SATA Power Adapter Cable
Installation Screw kit
Instruction Manual
2 - Included in Package 18" SATA Cable
Bay Key



18in Right Angle Latching SATA Serial ATA Cable

A space-saving, latching right angle SATA hard drive cable, for installations in tight spaces.

Your price
€3,99 EUR excl. VAT
€4,83 EUR incl. VAT

6in 4 Pin LP4 to SATA Power Cable Adapter

Power a Serial ATA hard drive from a conventional LP4 power supply connection

Your price
€2,99 EUR excl. VAT
€3,62 EUR incl. VAT

4x SATA Power Splitter Adapter Cable

Add four extra SATA power outlets to your Power Supply

Your price
€6,99 EUR excl. VAT
€8,46 EUR incl. VAT

18in Latching SATA Cable

SATA hard drive cable, with latching SATA connectors, for securely fastened hard drive installations.

Your price
€4,99 EUR excl. VAT
€6,04 EUR incl. VAT

6in SATA Power Y Splitter Cable Adapter - M/F

Add an extra SATA power outlet to your Power Supply

Your price
€7,99 EUR excl. VAT
€9,67 EUR incl. VAT

18in Latching Round SATA Cable

Connect latching SATA drives while helping to ensure optimal airflow throughout a desktop or server case

Your price
€4,99 EUR excl. VAT
€6,04 EUR incl. VAT


Talk to an Advisor

We are always ready to assist you with any questions you may have.

Live Chat (opens in new window)



Product Support

Talk to an Advisor

We are always ready to assist you with any questions you may have.

Live Chat (opens in new window)

Frequently Asked Questions


When you troubleshoot issues with a hard drive rack, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • SATA and SAS cables
  • Hard drives
  • Hard drive rack

To test your setup components, try the following:

  • Use the cables, hard drives, and hard drive rack in another setup to see if the problem is with the components or the setup.
  • Use a different cable, hard drive, and hard drive rack in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test the hard drive and hard drive rack, it is recommended that you do the following:

  • To check Disk Management, press the Windows key + R, type diskmgmt.msc, and press Enter.  Check to see if your hard drive is listed.
  • If the hard drive is listed with unallocated space, it needs to be formatted. Right-click unallocated and click New Simple Volume. Follow the on-screen instructions to complete the reformatting.

Note: Formatting a hard drive erases all of the data on it. Make sure that you back up all of your data before you reformat the hard drive.

  • If the hard drive is listed as healthy but does not have a drive letter assigned to it, for example, C:, right-click healthy and click Change Drive Letter and Paths. Click Add, assign a drive letter, and click OK.

Note: A formatted hard drive will not show up in Computer or My Computer until it has a drive letter assigned to it.

Yes, this mobile rack does support hot-swapping of SATA drives. To use this feature, it is required that the SATA port is set to Advanced Host Controller Interface (AHCI) mode and hot-swapping is enabled. On most motherboards, this is performed within the Basic Input/Output System (BIOS) or the Unified Extensible Firmware Interface (UEFI). If you are using a SATA controller card, consult the motherboard manufacturer's technical documentation for the correct steps to accomplish this.

Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

Customer Reviews

(4 reviews)
3 out of 5 stars
  • 5 (0)
  • 4 (2)
  • 3 (0)
  • 2 (2)
  • 1 (0)
Tell us what you think of this product.
Need a little help getting started?

Check out our review guidelines.

1 - 4 of 4 Reviews
(2 Stars)

Way too noisy

By: toad - 07/25/2017
I just bought this to fit in a new build to be able to easily swap between all the HDD I have lying around but I think I will be sending it back. Before I put this in, my computer which has 7 140mm case fans, 2 HDDs, a GTX 1080 ti and a huge tower cooler was next to silent. However this product alone (I assume because of the tiny fan at the back) is much noisier than my whole computer. It generates an irritating high-pitched whirring sound continuously, whether there are drives fitted in it or not. The product looks otherwise good (although it doesn't sit quite as flush with the front panel as other 5.25 devices) and seems to be of otherwise good quality but I simply cannot use it as is.
| Helpful?
Brian, Customer Support on 27/07/2017 14:22:03
Thanks for your feedback and review. We're very sorry the unit is noisy. The fan is needed to move enough air to cool the drives installed in this enclosure. We apologize for the inconvenience. It may not be ideal solution for all situations. If you have two 5.25" bays available, you could consider two of our HSB100SATBK units and one 25SAT35HDD. This combination would involve no fans. We hope this helps. If you have any concerns, please reach out to our Technical Advisors by clicking "Support" at the top of our website. Thank you.
(2 Stars)

How do you eject the SSD?

By: sorinc - 07/23/2018
Bought this last week and I really like the concept. The HDD is just fine, but I cannot eject the SSD. Just opening the door does not do anything and there is no eject button. What am I missing?
| Helpful?
Sam, Customer Support on 24/07/2018 11:58:26
Thank you for your feedback on HSB2535SATBK. We're sorry for the trouble you've had with ejecting your 2.5" drive. To remove the 2.5" drive, you should only have to pull the upper handle on the unit and open it, then the drive should eject very easily. If you find that you're still having trouble with this, we recommend contacting our Technical Advisors. We're available 24 hours a day, 5 days a week, at 1-800-265-1844 or www.startech.com/chat.
(4 Stars)

Good way to add additional storage to your system!

By: ShawnO_02 - 10/16/2018
This bay is easy to install into your system and makes swapping drives easy and convenient. While it seems to have solid construction some elements are plastic and feel under designed. It would be nice if the drive lights had more space between them so you can see from a distance which drive is getting use. As for functionality, both drives I attached worked great and I had no issues while testing the hot swap capabalities. Overall this is not my favourite StarTech product but it does work as advertised. I received this product in exchange for an unbiased review.
| Helpful?
(4 Stars)

Great concept just noisy

By: Andrew11 - 10/31/2018
This is a great way to mount and use both a 3.5 and a 2.5 drive in a single optical bay. Desktop designs are getting ever-smaller so it’s nice to have something like this to maximize space. The design is sleek and modern, the drives fit in it nicely and the mechanism loads and unloads the drives just by moving the handle in front of each drive. I was originally afraid the drives might rattle in the enclosure without padding but it wasn’t the case; instead it’s the fan for cooling that makes more noise than both drives. It’s set to a single-speed, which is safe, but unnecessary. It would have been better to have a variable-speed fan with either a temperature sensor or a dial at the front. I received this product in exchange for an unbiased review
| Helpful?
Back to top