FlexCage MB973SP-B
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Introducing the new face of Icy Dock screw-less technology, the FlexCage MB973SP-B 3-in-2 SATA Backplane. This product allows the user to install 3 x 3.5” SATA hard drives into a computer case’s 2 available 5.25” device bays. Using our world renowned screw-less technology, no screws or tools are required to insert or eject the drives making hot swapping a completely hassle free experience.

The front of the device includes childproof power buttons for each drive which require the button to be pressed slightly deeper than normal to ensure that a drive is not accidentally turned off by bumping into it or rubbing against it. These power buttons also act as an LED indicator showing drive power and activity. Similarly, each drive door has a multi-locking latch mechanism to prevent a door from being opened easily, making it an ideal solution for systems where IT and non-IT personnel have access. Also on the front are USB and eSATA ports to quickly and easily connect external storage peripherals, especially useful for cases that do not have front/top port access.

On the rear of the MB973SP-B is a monster 80mm cooling fan to pull cool air from the front ventilation slots, over the drives, and exhaust the warm air out through the rear ventilation slots. The fan also features an “on-demand” power system, so that the fan is only powered on if a drive’s power is on. So even if all 3 slots are filled, the fan will only spin if one of the drives is powered on. And if the included fan is not enough, it can be upgraded to use most aftermarket 80mm case fans that use a 2 or 3 pin connector, giving the user a wide range of choices according to their preferences. To further the user’s customization, a 3 speed fan control is built in letting the user choose between high, low, or auto. The auto setting uses our Smart Cooling Technology to adjust fan speed according to the cooling requirements of the drives. An internal SATA cable and USB header connector are also built into the rear for easy connection to the systems motherboard or add-on card.
* Fits 3 x 3.5” SATA HDD into 2 x 5.25” Device Bays
* Support SATA 3 (6 Gb/s) hard drive.
* Screw-less, tool-less design for genuine plug &play and hot swap use
* Stylish aluminum body construction for durability and heat dissipation
* 80mm cooling fan for maximum air flow
* On-demand power system - Fan power only when a drive is powered on
* Fan is replaceable with aftermarket fans that use 2-pin or 3-pin connectors
* 3 speed fan control including Smart Cooling Technology providing temperature
* Front and rear ventilation slots
* Front side USB and eSATA ports for convenient external storage connections
* Individual power switches and LEDs for each drive
* Child-proof power buttons to avoid accidental power shut down
* Multi-locking door latches to prevent accidental drive ejection
* Internal SATA cable and USB header cable built into rear of device
Video Introduction:
3 Years Warranty
ICY DOCK FlexCage MB973SP-B Tray-less 3x 3.5” HDD in 2x 5.25” Bay SATA Cage - Front USB + eSATA Port
Product Name :
Tray-less 3 in 2 SATA Backplane Module
Model Number :
Color :
Support Drive Size :
2.5" SSD / HDD
Compatible Drive Type :
SATA / SAS (Support Single Channel SAS)
Number of Drives :
Max Drive Height :
3.5" up to 26.1mm
Drive Bay :
2 x external 5.25" drive bay
Host Interface :
3 x SATA 7pin
Power Input :
4 pin power port x 2 or 15 pin power port x 2
Transfer Rate :
Up to 6Gbps (Depending on hard drive speed)
Support HDD Capacity :
No Limitation
Drive Cooling :
1 x 80mm ball bearing fan
Structure / Material :
Aluminum and partial plastic
Support Hot-Swap :
Product Dimension (L x W x H) :
210 x 148 x 85mm
Product Weight :
1.97 lbs(892g)
Shipping (Package) Weight :
RAID Status LED Indicator :
Drive Activity LED Indication :
Drive power: solid blue; HDD access: flashing blue
Package contents :
1 - Device, 1 - user manual, 10 - screw
SATA Connector Insertion Rate :
Humidity :
5%~65% RH
Operating Temperature :
0°C to 60°C (32°F to 140°F)
Storage Temperature :
-35°C to 70°C (-31°F to 158°F)
Compliance :
Warranty :
3 years



ICY Tip:
July 2013

Build a DIY FreeNAS, unRAID and WHS NAS
Media Center with ICY DOCK Hard Drive Cage Module
April 2013

Build a Premium and Hot-Swappable
Gaming or Media Storage Tower Case Using
the FlexCage Tray-Less HDD Cage
December 2011

Restore New Life Into Your Older Hard Drives to
Maximize Available Free Space
May 2011

Best hard drive module for silent PC / gaming system
December 2010

Optimize your HDD storage system performance
in your gaming case with MB973SP-B


Product Review:
Mon, 2011-06-13 04:20.

Submitted by Lawrence Lee

"The MB973 is well constructed, works just as one would expect, and does so quietly with a very low noise level. If you're in the market for a quiet, actively cooled multi-bay externally accessible hard drive rack, we can recommend it without any hesitation."

December 20, 2010


"If you want an efficient way to cleanly organize drives in your WHS case and have easy access to adding and removing them, this is an excellent solution."

November 24th, 2010

Article by: Jackie Mueller

Edited By: Nathan Glentworth

"With a growing number of internal enclosures being released, this offering from Icy Dock still manages to stand out from the crowd. Icy Dock's ability to install three hard drives inside two 5.25" bays in the MB973SP-B is a clever way to utilize space that frequently goes unused."


by Brian

" Overall the build quality is strong, the features are strong and the price is right, a trifecta making it easy to recommend."

Monday, 01 November 2010

Written by Matthew Rogers - runithard -

"The ICY DOCK MB973SP-B Tray-Less 3 in 2 SATA Backplane Module is a quality product that exceeds all my expectations for a fairly priced raid cage. All functions work well and the construction and materials are solid. The appearance is grade A, you could put a series of these on the Enterprise D and they would improve the set quality.

Offering the well executed "Xpress TRAY-LESS SETUP", SATA 6.0Gbps, eSATA port, USB port, and selectable active cooling, the ICY DOCK MB973SP-B is a must buy item for a power user who wants to put together a large disk array or simply clean up his/her case."

Tue, Oct 19, 2010

Author: Jim Clark

" Would I recommend this hot swap module? Good looking, easy tool-less install, quiet, and trayless means Yes from me."

Product Reviews
Published on Jan 31, 2013
By HiTechLegion
ICY DOCK FlexCage MB973SP-B / MB974SP-B Trayless SATA Backplane Unboxing + Overview + Benchmarks
Link to video: https://www.youtube.com/watch?v=e6RPEtCVbAc


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