ToughArmor MB852M2PO-B
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Note:This device requires an NVMe host and OCuLink connection. It does not support Laptop and Desktop PC’s slim ODD bay that uses Slimline SATA backplane
Compatibility Chart

The ToughArmor MB852M2PO-B replaces the legacy slim CD/DVD bay with 2 x high-speed M.2 NVMe SSD. It fits Ultra-Slim 9.5mm optical disk drive (ODD) bay and uses removable M.2 drive trays for effortless drive access and maintenance. It is a perfect storage upgrade solution for customized Industrial-PC, Server Rackmount, and Embedded Systems.

World’s First Removable M.2 NVMe SSD Enclosure

The M.2 drive is typically installed on a motherboard or PCIe card and secured by tiny screws. It can be a time-consuming process when installing or removing the drive and makes M.2 SSD not the ideal choice for enterprise applications where easy maintenance with minimum downtime is essential. ToughArmor MB852M2PO-B’s swappable M.2 drive trays allow you conveniently access the drives from the frontal Ultra-Slim optical drive bay of your system without opening the computer case.


In order to support M.2 22110 SSD, the length of MB852M2PO-B is longer than the standard Ultra-Slim ODD (159.3mm). Make sure to check the clearance of your Ultra-Slim ODD bay before purchasing.

Effortless Tool-less M.2 Drive Installation

The ToughArmor MB852M2PO-B is designed with a patent-pending M.2 adjustable locker for tool-less drive installation/removal. Simply insert the M.2 SSD (2230, 2242, 2260, 2280, and 22110), move the adjustable M.2 locker until it firmly secures the M.2 SSD and closes the lid. The whole process only takes less than 10 seconds to complete, saving your valuable time and resources.

Superior PCIe 4.0 Performance

To fully utilize the speeds of M.2 NVMe SSD, each drive bay of the MB852M2PO-B uses its’ own PCIe Gen 4 OCuLink (SFF-8612) connection and support up to 64Gbps data transfer speed, which is up to 2 times faster than PCIe 3.0 and 10 times faster than SATA interface.

Optimal Cooling Efficiency

The specialized slimline tray is made with thick aluminum and acts as heatsink to dissipate heat generated by the M.2 NVMe SSD through large ventilation opening on both the top and bottom of the device.


The included thermal pad fills the gap between the contact surface and transfers heat away from the M.2 SSD to the larger surface of the metal cover, allowing airflow to dissipate the heat away quickly.

EMI Grounding Technology

Grounding your M.2 SSD is very important through many swaps. Swapping drive without grounding properly may lead to hardware damages due to static shocks. With our innovative EMI Grounding Technology, once the M.2 locker clips into the SSD screw hole, the SSD will be in a grounded state throughout the tray and housing of the enclosure. Once the enclosure installed in the system with four screws on its’ side, it will then ground itself throughout your computer system.

Tough Protection for the Harshest Environment

With the ToughArmor Series, it is equipped with a ruggedized full-metal chassis and tray to ensure a long product lifespan. An anti-vibration mechanism is built right into the chassis to reduce noise and shield the drive from environmental damage.

LED indication

The MB852M2PO-B is equipped with drive activity LED indicator on the drive tray to show drive power and activity. The LED will be automatically powered off when no drive installed to indicate an empty bay.

Compatible Drive Tray (Caddy)
Interchangeable Drive Tray (Caddy) with:
Key Features
Fits 2x M.2 PCIe NVMe SSD with all length - 2230 (30mm), 2242, (42mm), 2260 (60mm), 2280 (80mm), and 22110 (110mm)
Uses 2x PCIe Gen 4 OCuLink connector and support up to 64Gbps transfer speed
OCuLink connector pinout supports SFF-9402 specification
Installs into 9.5mm ultra-slim optical disk drive (ODD) bay
Designed for customized Industrial-PC, server rackmount, and embedded systems
Removable drive tray with tool-less drive installation design for easy drive maintenance
Eagle-hook lock system keeps the drive secure in the enclosure
EMI-Grounding – protects drives from electrical damage
Anti-Vibration Technology (AVT) reduces noise and protects against environmental damage
Active Power Technology (APT) saves power by shutting the device down when no drive installed
Built-in thermal pad conducts the heat from the drive to the metal tray
Complimentary support from professionally trained technical support agents
Industry-leading 3-year warranty against all defects
Designed for backplane-less Slim ODD bay with minimum 160mm clearance
NVMe host and OCuLink connection required. Not compatible with the SATA host


3 Years Warranty
Model Number :
Color :
Support Drive Size :
2 x M.2 PCIe NVMe SSD (2230/2242/2260/2280/22110)
Compatible Drive Type :
Number of Drives :
Support Drive Length :
30mm - 110mm
Drive Bay :
1 x external Ultra Slim ODD Bay
(Length clearance requirement - 160mm)
Host Interface :
2 x OCuLink (SFF-8612), pin-out defined by SFF-9402 Rev 1.1
Power Input :
1 x 15pin SATA power connector
Transfer Rate :
Up to 64Gbps (Depending on SSD Speed)
Support SSD Capacity :
No Limitation
Drive Cooling :
Metal heat dispersion with passive cooling
Structure / Material :
Metal with partial ABS plastic
Dimension (W x H x D) :
128.1 x 9.5 x 159.3mm
Product Net Weight :
Package Gross Weight :
Drive Activity LED Indication :
SSD power: solid green; SSD access: flashing green
Package contents :
Device, user manual, screws
M.2 Connector Insertion Rate :
Humidity :
5%~65% RH
Operating Temperature :
0°C to 70°C (32°F to 158°F)
Storage Temperature :
-35°C to 70°C (-31°F to 158°F)
Compliance :
Warranty :
3 years



Frequent Asked Questions
Q: Can you recommend an add-on card that works with MB852M2PO-B?

A: The following add-on cards are compatible with MB852M2PO-B. We highly recommend using the official cable for the best compatibility.



Brand Add-on Cards Compatible Cables
(2 Ports)
9500-16i Slimline SAS 8-Lane to OCulink 4-Lane x2 Cable
(SFF-8654 8i to SFF-8611 4i)
Download pinout diagram

Send us the pinout diagram of the cable you
desire to use for the compatibility check

Known compatible cables:
Serial Cable SLSP-8X-11X2-0.5M
Micro SATA Cables MIC74-8401

Known incompatible cables:
Broadcom 05-60001-00

Note: Websites listed above are not affiliated with ICY DOCK and solely responsible for their products and services
(2 Ports)
(2 Ports)
HighPoint SSD7580  
SuperMicro X12SPM-TF
Micro SATA
(M.2 to SlimSAS)
  OCuLink SFF-8611 4-Lane to Slimline SAS SFF-8654 4-Lane Cable
(SFF-8611 4i to SFF-8654 4i)
Download pinout diagram

Send us the pinout diagram of the cable you
desire to use for the compatibility check

Known compatible cables:
Micro SATA Cables RML42-0503

Note: Websites listed above are not affiliated with ICY DOCK and solely responsible for their products and services



We are currently certifying our NVMe enclosure with the major add-on card manufacturers. We will be adding compatible add-on cards to the list.

You can click here to report a compatible add-on card/cable. If you want to check the compatibility of add-on card(s) that are not on the list, please click here.

Q: I'm using Intel/Broadcom Tri-Mode HBA and RAID cards with the MB852M2PO-B, but the drives do not show up in my system.
A: The issue is caused by RAID card manufacturers using a different pin-out for Tri-Mode cards than is typically used for U.2 connections. When using the Tri-Mode cards with M.2 NVMe drives, a U.2 enabler cable must be used for Tri-Mode card to detect the M.2 drive, which reverts the pin-out to standard U.2 specifications. For more information, please Click here.

Q: My NVMe drive did not detect after inserting it back into the device while powered on?

A: For systems that support hot-plug function, while your system is powered on, each drive insertion and removal cycle will require a manual refresh from the operating system in order for the system to recognize the drive.


If you are unable to detect the drive after performing the manual refresh, your system might not support hot-plug functions. We suggest you check with the motherboard/add-on card manufacturer to see if it supports the NVMe hot-plug function.


Windows 10 / Windows 8 – In the search box on the taskbar, type Device Manager, then select from the menu, right-click on the disk drive and then select scan for hardware changes.


Windows 7 – Right-click on computer icon on desktop and select properties, click Device Manager, right-click on the disk drive and then select scan for hardware changes.


Image result for disk drive scan for hardware changes


Q: I'm having the difficulties closing the lid of the drive tray and unable to insert the drive tray all the way to the drive enclosure after placing the M.2 SSD onto the drive tray.

A: Make sure to lock the M.2 SSD with the adjustable M.2 locker. The tray lid will not close properly if the M.2 locker is not fully secured. If you are having difficulty secure the M.2 locker or close the cover, the M.2 SSD you are using may not follow the standard M.2 SSD thickness, which is less than 1.5mm height for each side with a total height that does not exceed 3.8mm. Using the M.2 SSD with non-standard thickness will cause improper tension on the M.2 locker and tray lid and make the M.2 connector misaligned. If you are having issues inserting the drive tray to the enclosure, please stop the operation immediately and check the drive thickness to ensure it follows the standard M.2 SSD thickness - less than 1.5mm height for each side and less than 3.8mm for total height.

Metal heat dissipation sticker


Note: Some M.2 SSD uses a metal heat dissipation sticker that causes each side's thickness more than the 1.5mm. Remove the sticker will solve the problem, but do it at your own risk (might void the warranty of SSD)


ICY DOCK enclosure is design to be compatible with M.2 SSD that has standard thickness. We highly recommend checking the drive thickness before purchase, and please refer to the incompatible M.2 SSD list below for further information:


M.2 NVMe SSDs known to be incompatible with ICY DOCK enclosure:


M.2 SATA SSDs known to be incompatible with ICY DOCK enclosure:


Please contact if the problem persists so we can resolve the issue as soon as possible.

Click here to report a compatible/incompatible M.2 SSD.

Purchase Links


Product Reviews

By Will Taillac

May 17, 2021

"The ICY DOCK ToughArmor MB852M2PO-B is a well-made niche product. Many legacy servers have unused optical drives or drive bays on the front, and something like this would easily allow for front-loading of NVMe drives for boot purposes rather than using an internal SATA DOM or similar."

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