---
product_id: 15647278
title: "StarTech.com 4-Bay Mobile Rack Backplane - Trayless Hot Swap Mobile Rack Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD (HSB4SATSASBA)"
brand: "startech.com"
price: "Bs.2791"
currency: BOB
in_stock: true
reviews_count: 11
category: "Star Tech.Com"
url: https://www.desertcart.bo/products/15647278-startech-com-4-bay-mobile-rack-backplane-trayless-hot-swap
store_origin: BO
region: Bolivia
---

# 6 Gbps SATA III & SAS II data transfer speed 4 hot-swap bays for 3.5in SAS/SATA HDDs Built-in fan + vented aluminum for optimal cooling StarTech.com 4-Bay Mobile Rack Backplane - Trayless Hot Swap Mobile Rack Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD (HSB4SATSASBA)

**Brand:** startech.com
**Price:** Bs.2791
**Availability:** ✅ In Stock

## Summary

> 💼 Upgrade your storage game with enterprise-grade hot-swap power — because downtime is so last decade.

## Quick Answers

- **What is this?** StarTech.com 4-Bay Mobile Rack Backplane - Trayless Hot Swap Mobile Rack Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD (HSB4SATSASBA) by startech.com
- **How much does it cost?** Bs.2791 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/15647278-startech-com-4-bay-mobile-rack-backplane-trayless-hot-swap)

## Best For

- startech.com enthusiasts

## Why This Product

- Trusted startech.com brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Hot-Swapping:** Trayless design with individual ejection levers and key-lock security for seamless drive swaps without downtime.
- • **Space-Savvy Integration:** Transforms three 5.25” bays into a compact 4-drive hot-swap solution, perfect for sleek professional builds.
- • **Intuitive Status Monitoring:** Power and activity LEDs on each bay provide real-time drive health insights at a glance.
- • **Optimized Thermal Management:** Vented solid aluminum enclosure paired with a speed-controlled fan keeps drives cool and reliable 24/7.
- • **Universal Drive Compatibility:** Supports SATA I/II/III and SAS I/II drives, ensuring maximum flexibility for enterprise-grade storage setups.

## Overview

The StarTech.com 4-Bay Mobile Rack Backplane converts three 5.25-inch bays into a trayless, hot-swappable interface for up to four 3.5-inch SATA or SAS hard drives. Supporting SATA I/II/III and SAS I/II with 6 Gbps transfer speeds, it features individual ejection levers, key-lock security, power/activity LEDs, and a vented aluminum enclosure with a speed-controlled fan to maintain optimal drive temperatures. Designed for professional-grade reliability and easy integration, it’s ideal for enterprise and custom multi-drive storage solutions.

## Description

The removable mobile rack backplane for 3.5in SAS II/SATA III makes inserting and removing drives fast and easy, by turning three 5.25" bays into a hot-swappable interface for up to four 3.5” SATA or SAS hard drives (HDD). For added versatility, the hot swap backplane for 3.5in SAS II/SATA III can interface with SATA I/II/III and SAS I/II hard drives -- an ideal solution for enterprise system applications. For a quick and secure method of installing and removing drives, the trayless hot swap mobile rack backplane features ejection levers and a key-lock design. To help prevent drive failure, the removable mobile rack backplane provides drive cooling with a built-in fan and excellent heat dissipation with a vented aluminum enclosure. The 4-bay aluminum backplane is backed by a StarTech..

Review: Quick an easy way to add hot swap bays. - I now have two of these units for separate machines, not because of failure. The first one I installed in mid 2021, the second in late 2023. It's now fall of 2025 and both units are going strong fully populated, 24/7. In the multiple years I've had these units I've never experienced a fault that wasn't due to a drive dying. I fell in love with hot swapping hard drives using old server hardware but hated the noise, weight and physical space often required for such machines, and wanted to "downgrade" to more consumer desktop-style cases. Few cases like that are designed for pulling drives without opening the case but these bays solved that problem as long as your case has 3 5.25" bays that open to the outside. Admittedly even THAT is becoming harder to find in cases since fewer people are adding accessory components that need them. If you can install a hard drive then you can install this; although since it's longer than a typical hard drive if your case is small, or otherwise cramped around the back of the 5.25" bays then getting to the power and SATA cables could be a bit difficult when you install it. Fortunately because it's a hot swap bay you shouldn't ever need to access the back of the unit after installation. The unit does require a SATA data cable for each drive, but only needs 2 SATA power cables which makes cable management a bit easier. I've run everything from older 1TB drives to 16TB 7200RPM "Enterprise" drives and they've all been detected no differently than if they were directly connected to the motherboard. This is expected but I'm pointing it out as sometimes there are compatibility issues particularly with larger hard drives. The drives are firmly secured but promptly pop out for removal when you open the each door fully. The door doesn't extract the drive until it's nearly fully open so you don't have to worry about accidentally disconnecting a drive if you open the wrong slot. I don't use the locks on the doors. They exist which is nice, and would slow someone from easily ripping your drives out (such as a curious child) but I wouldn't rely on them for actual security purposes. Other reviews have commented that the fans are loud. Either that was an issue with units older than mine and has since been fixed, or I'm just lucky because both of mine are dead silent. Drive temps are kept well within reasonable levels; checking my logs (monitored with AnalogJ Scrutiny) I peak at 40c on one drive over the last year, with the average being 38c; and neither machine is particularly well ventilated.
Review: Great backplane, perfect for custom builds of multidisk enclosures. - I needed a 4 Disk back plane that didn't use port multiplication for my RAID 10 setup on my server system and this worked perfectly. It is intended to fit inside of the actual PC chassis, but for what I was doing that was not possible. I needed it to be able to connect to 4 WD Red 3TB drives for RAID 10 with hotswap, but needed it to be separate from the actual server computer. I was able to build a custom case for this, and wired up a power supply to go in the bottom of the case to run the enclosure. The enclosure sits in the top of the case, and has 4 SATA plugs coming from my Intel RS2PI008 RAID Card via a Mini SAS to SATA breakout cable. Once I finished with all of the building, I plugged it all up to the server and set up the RAID without a hitch. I like the fact that this backplane has individual LEDs for each drive to monitor activity and will tell you when one of the drives in not functioning. Each drive slot is trayless, and is easy to insert and remove the disks from. All you have to do it open the door on the front for the slot you want to insert the disk in, and slide the disk in partially. Then close the door and the spring in the hinge will do the rest for you, pushing the disk all the way in and making the connection on the PCB. To remove the disk, just open the door, and the disk will partially pop out of the slot allowing you to grab hold of it to install a new one. Each slot has a lock on it, so you can lock the doors to prevent someone from opening the doors and disconnecting the disks. This is nice if the unit is in a place where others are able to access it, just don't lose the keys (It comes with 2). If you are installing it inside of a chassis, there are slots on each side for installing screws to hold the backplane in position. It requires 2 SATA Power connectors from you PSU, and it is recommended to use each from a different rail, especially if you are using the same rails for powering other things. This way you won't over load the rails. There are 2 switches on the back, one for turning on and off the LEDs, and one for setting the fan to either off, low or high. There is also a cut out where you can see 4 pin spots on the PCB that are not filled in. I took the whole thing apart to try and figure out what they are for, and as far as I can tell, they are for a temp sensor. I looked around on the net and there are a few models similar to this one that have a temp sensor installed from the factory. I guess if you wanted to, and you are good at soldering, you could install your own if you have a thermocouple, but without an LCD readout it would be kinda pointless. Overall this is a nice backplane, that is built really well and is ready for the long haul. I forgot to mention, that the 4 drive slots are able to accept either SATA or SAS drives, but the ports on the back are only SATA unfortunately, but it isn't hard to find a SAS to SATA cable adapter or even a SATA to eSATA adapter if needed. The fan that installed in it is a standard 3 pin 80mm fan, and it is really quite as it is with it set to low. If the fan ever fails, or you just want to install a higher grade one, it isn't hard. There are 4 screws on the housing for the fan that need to be removed to gain access to the fan, but the other 12 screws around the outside of the back plate have to be removed to gain access to the PCB so you can unplug the fan. I can't remember right off the top of my head, but I think the plug for the fan is a non-standard 3 pin plug, so you may want to have a de-pinning kit ready so you can swap the plugs out. The PCB for the backplane is not readily available online, I did some searching for it to see, as really for what I wanted to do that was the only part of this I really needed, but I was unable to find one. As long as the temps stay relatively low, and the input voltages don't spike ( I have it connected to a APC 1500 Pro UPS so there shouldn't be any fluctuations in voltage) and blow the circuit it should be fine and not need replacement. If it does, I guess I will have to contact StarTech and see if they can point me in the right direction to procure a replacement. Since this is going to be used for my server to maintain all of my media and backups it will be on 24/7 so I will put time on it quickly and I will post back later on to let you guys know how it holds up. I predict there will not be any issues, but I have been wrong before, just ask my Wife.

## Features

- INCREASED PRODUCTIVITY: The mobile rack backplane for 3.5in SAS II/SATA III turns three 5.25in bays into a hot-swappable interface for up to four 3.5” SATA or SAS hard drives (HDD)
- MAXIMUM COMPATIBILITY: The hot swap backplane for 3.5in SAS II/SATA III can interface with SATA I/II/III and SAS I/II hard drives, an ideal solution for enterprise system applications; Power and status LEDs for each bay
- EASY TO USE: For a quick and secure method of installing and removing drives, this trayless hot swap mobile rack backplane features individual ejection levers for each bay and a key-lock design (includes two keys)
- MAINTAIN OPTIMAL TEMPERATURE: To help prevent drive failure, the 4-drive hot swap backplane features a vented solid aluminum enclosure that provides excellent heat dissipation in addition to a built-in fan with speed control; UL VO flammability rated

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00OUSU8MI |
| Best Sellers Rank | #418 in Enclosures |
| Compatible Devices | Desktop |
| Connectivity Technology | SATA |
| Customer Reviews | 4.1 4.1 out of 5 stars (284) |
| Data Transfer Rate | 750 Megabytes Per Second |
| Date First Available | October 30, 2014 |
| Global Trade Identification Number | 00065030859547, 05057454485711, 07426800234200 |
| Hard Disk Form Factor | 5.25 Inches |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.81 pounds |
| Item model number | HSB4SATSASBA |
| Manufacturer | StarTech.com |
| Max Number of Supported Devices | 4 |
| Memory Storage Capacity | 6 GB |
| Product Dimensions | 7.76 x 5.75 x 4.96 inches |
| UPC | 650308595472 650361661282 065030859547 012305135486 |

## Product Details

- **Brand:** StarTech.com
- **Color:** Black
- **Hardware Interface:** SATA 6.0 Gb/s
- **Hardware Platform:** Personal Computer
- **Material:** Aluminum

## Images

![StarTech.com 4-Bay Mobile Rack Backplane - Trayless Hot Swap Mobile Rack Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD (HSB4SATSASBA) - Image 1](https://m.media-amazon.com/images/I/81+LtsGjrAL.jpg)

## Questions & Answers

**Q: Can you replace rear fan with quiet aftermarket?**
A: I went as far as to buy a 80 mm to 120 mm adapter and stick an ultra quiet 120 mm fan.  The result is exactly what I wanted -- quiet running, more air drawn over the drives, and cooler drives.

**Q: Is trayless or ones with trays better for minimizing rattles and vibration?**
A: I can't answer the vibration or rattle comparison, but I have had this unit since Oct. 2014, and have had no issues with the unit or hard drives going bad?  I am using in a home server running 24/7.  I bought it in case I needed to swap drives, but i haven't had to yet...

**Q: Does this work with 6tb western digital red hard drives?**
A: works with any SATA or SAS hard drive (obviously you must connect the drive bay to a Sata or Sas controller).  We use western digital RE drives and one thing you need to be aware, once you insert the drive, you need to open the door slightly and push drive firmly unto the backplane with your thumb, then reclose the door.  This ensures a square and fully inserted drive onto the backplane.

**Q: Do i need a separate power supply cable?**
A: Yes, you can run one cable from the PSU peripheral to the cage.  But be ware, do not daisy chain more than one cage (if you buy more than one).   Each drive can consume up to 10-12 Watts depending on your drive, and say another 2 watts for the fan itself, and you are getting close to the 56 Watt limit for a line on the PSU/SATA spec.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quick an easy way to add hot swap bays.
*by S***D on September 18, 2025*

I now have two of these units for separate machines, not because of failure. The first one I installed in mid 2021, the second in late 2023. It's now fall of 2025 and both units are going strong fully populated, 24/7. In the multiple years I've had these units I've never experienced a fault that wasn't due to a drive dying. I fell in love with hot swapping hard drives using old server hardware but hated the noise, weight and physical space often required for such machines, and wanted to "downgrade" to more consumer desktop-style cases. Few cases like that are designed for pulling drives without opening the case but these bays solved that problem as long as your case has 3 5.25" bays that open to the outside. Admittedly even THAT is becoming harder to find in cases since fewer people are adding accessory components that need them. If you can install a hard drive then you can install this; although since it's longer than a typical hard drive if your case is small, or otherwise cramped around the back of the 5.25" bays then getting to the power and SATA cables could be a bit difficult when you install it. Fortunately because it's a hot swap bay you shouldn't ever need to access the back of the unit after installation. The unit does require a SATA data cable for each drive, but only needs 2 SATA power cables which makes cable management a bit easier. I've run everything from older 1TB drives to 16TB 7200RPM "Enterprise" drives and they've all been detected no differently than if they were directly connected to the motherboard. This is expected but I'm pointing it out as sometimes there are compatibility issues particularly with larger hard drives. The drives are firmly secured but promptly pop out for removal when you open the each door fully. The door doesn't extract the drive until it's nearly fully open so you don't have to worry about accidentally disconnecting a drive if you open the wrong slot. I don't use the locks on the doors. They exist which is nice, and would slow someone from easily ripping your drives out (such as a curious child) but I wouldn't rely on them for actual security purposes. Other reviews have commented that the fans are loud. Either that was an issue with units older than mine and has since been fixed, or I'm just lucky because both of mine are dead silent. Drive temps are kept well within reasonable levels; checking my logs (monitored with AnalogJ Scrutiny) I peak at 40c on one drive over the last year, with the average being 38c; and neither machine is particularly well ventilated.

### ⭐⭐⭐⭐⭐ Great backplane, perfect for custom builds of multidisk enclosures.
*by J***G on April 20, 2015*

I needed a 4 Disk back plane that didn't use port multiplication for my RAID 10 setup on my server system and this worked perfectly. It is intended to fit inside of the actual PC chassis, but for what I was doing that was not possible. I needed it to be able to connect to 4 WD Red 3TB drives for RAID 10 with hotswap, but needed it to be separate from the actual server computer. I was able to build a custom case for this, and wired up a power supply to go in the bottom of the case to run the enclosure. The enclosure sits in the top of the case, and has 4 SATA plugs coming from my Intel RS2PI008 RAID Card via a Mini SAS to SATA breakout cable. Once I finished with all of the building, I plugged it all up to the server and set up the RAID without a hitch. I like the fact that this backplane has individual LEDs for each drive to monitor activity and will tell you when one of the drives in not functioning. Each drive slot is trayless, and is easy to insert and remove the disks from. All you have to do it open the door on the front for the slot you want to insert the disk in, and slide the disk in partially. Then close the door and the spring in the hinge will do the rest for you, pushing the disk all the way in and making the connection on the PCB. To remove the disk, just open the door, and the disk will partially pop out of the slot allowing you to grab hold of it to install a new one. Each slot has a lock on it, so you can lock the doors to prevent someone from opening the doors and disconnecting the disks. This is nice if the unit is in a place where others are able to access it, just don't lose the keys (It comes with 2). If you are installing it inside of a chassis, there are slots on each side for installing screws to hold the backplane in position. It requires 2 SATA Power connectors from you PSU, and it is recommended to use each from a different rail, especially if you are using the same rails for powering other things. This way you won't over load the rails. There are 2 switches on the back, one for turning on and off the LEDs, and one for setting the fan to either off, low or high. There is also a cut out where you can see 4 pin spots on the PCB that are not filled in. I took the whole thing apart to try and figure out what they are for, and as far as I can tell, they are for a temp sensor. I looked around on the net and there are a few models similar to this one that have a temp sensor installed from the factory. I guess if you wanted to, and you are good at soldering, you could install your own if you have a thermocouple, but without an LCD readout it would be kinda pointless. Overall this is a nice backplane, that is built really well and is ready for the long haul. I forgot to mention, that the 4 drive slots are able to accept either SATA or SAS drives, but the ports on the back are only SATA unfortunately, but it isn't hard to find a SAS to SATA cable adapter or even a SATA to eSATA adapter if needed. The fan that installed in it is a standard 3 pin 80mm fan, and it is really quite as it is with it set to low. If the fan ever fails, or you just want to install a higher grade one, it isn't hard. There are 4 screws on the housing for the fan that need to be removed to gain access to the fan, but the other 12 screws around the outside of the back plate have to be removed to gain access to the PCB so you can unplug the fan. I can't remember right off the top of my head, but I think the plug for the fan is a non-standard 3 pin plug, so you may want to have a de-pinning kit ready so you can swap the plugs out. The PCB for the backplane is not readily available online, I did some searching for it to see, as really for what I wanted to do that was the only part of this I really needed, but I was unable to find one. As long as the temps stay relatively low, and the input voltages don't spike ( I have it connected to a APC 1500 Pro UPS so there shouldn't be any fluctuations in voltage) and blow the circuit it should be fine and not need replacement. If it does, I guess I will have to contact StarTech and see if they can point me in the right direction to procure a replacement. Since this is going to be used for my server to maintain all of my media and backups it will be on 24/7 so I will put time on it quickly and I will post back later on to let you guys know how it holds up. I predict there will not be any issues, but I have been wrong before, just ask my Wife.

### ⭐ Does not work
*by W***E on May 25, 2023*

Works fine with 2 drives, starts acting a bit flakey with 3 and with 4 it's nothing but problems. A drive starts going online and offline, and not always the same drive. I connected all 4 drives to the computer directly and no problems, so I check things over and try this bay again with the exact same result. A bit of a disappointment having had good experiences with Startech stuff until now.

## Frequently Bought Together

- StarTech.com 4-Bay Mobile Rack Backplane - Trayless Hot Swap Mobile Rack Backplane for 3.5in SAS II/SATA III - 6 Gbps HDD (HSB4SATSASBA)
- Noctua NF-A8 PWM, Premium Quiet Fan, 4-Pin (80mm, Brown)
- 4U Rackmount Server Chassis with 6 x 5.25 Front Bays + 1 x 3.5 + 4 x 2.5 Bays

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*Product available on Desertcart Bolivia*
*Store origin: BO*
*Last updated: 2026-01-31*