Hands On: Icy Dock MB994SP-4S Enclosure


Small form factor cases, like Shuttle cases, have been popular for use in self-built WHS machines.  While they are quite small and can be “stuffed” into about any corner, they do have one major flaw: expandability.  These cases may come with a couple of 3-1/2” bays and a single 5-1/4” bay.  Consequently, the maximum number of 3-1/2” drives that could be supported in that style of case would be three.

A better use for that single (external) 5-1/4” bay might just be an Icy Dock MB994SP-4S.  Depending upon how many SATA connectors your MB has and/or the use of a PCI SATA controller, you could increase the maximum number of drives from 3 to 6.  Of course, 4 of those drives would be 2-1/2” drives in that MB994SP-4S enclosure.

What’s In The Box?

Before we get to what is inside, we have the a nice consumer-style package that  gives you an excellent idea of what you are getting.


Once opened, we find inside a Q.I.G., a bag of screws, and a bay enclosure.  Please note that the enclosure and trays (like the previously reviewed MB991IK-B) are made from steel, *not* plastic.


A shot of the backside of the enclosure.


Partial removal the HDD tray.


The tray itself without a drive


and with a drive.


Finally, the enclosure with the HDD tray reinstalled.  The extra tray is from an Icy Dock MB991IK-B enclosure, reviewed here, which has interchangeable trays with MB994SP-4S.


Product Features and Specifications


Introducing the Icy Dock MB994SP-4S Quad Bay 2.5″ SATA/SAS Mobile Rack for use in a single 5.25″ device bay. This product is constructed of heavy duty metal to hold up in the toughest of conditions. It includes ventilation slots on the front, back, top and bottom for maximum airflow to keep both SATA and SAS drives running cool, and an LED is placed on the front of each drive tray to give the user drive status at all times. Dual 4-pin power connectors are used to ensure a consistent power supply to all 4 drives, whether they are low power SSD’s or power hungry 15000 RPM SAS drives. Also included are dual 40mm cooling fans to keep the drives running in at optimal temperatures in even the most intense applications. The fans utilize Active Power Technology, so that the fans only power up if there are drives installed. If no drives are inserted, neither fan will power up. If drives are only inserted on the right side, only the right-side fan will power up, and vice versa.

The MB994SP-4S utilizes our brand new EZ Slide Mini Trays, making drive interchangeability and maintenance completely hassle free. The trays are built using full metal so that they are durable for many lifetimes, but will not weigh you down when transporting your data from system to system. And featuring a full cage design, the added top drive cover provides added protection while moving the drive. The trays are also designed to accommodate 9.5mm, 12.5mm, and 15mm drives giving you the ultimate universal 2.5″ hot swap bay.

Utilizing its small form factor, The MB994SP-4S is perfect for use in industrial PCs, servers, or any small form factor case where 5.25” bays are limited and large drive capacity is needed, especially compact RAID 5 systems. It is built to function in the most demanding environments including military and law enforcement deployment, as well as manufacturing conditions such as embedded control systems and factory automation systems. The heavy metal design makes it ideal for placement in rugged environments.


Model Number : MB994SP-4S

Color : Matt Black

Host Interface : 7 pin SATA x 4

Drive Fit : 2.5″ SAS or SATA I /II HDD / SSD x 4

Drive Bay : 5.25″ Bay x 1

Transfer Rate : Up to 6 Gb/sec. (depending on hard drive speed)

Insert& Extract conection Via : 15 pin direct hard drive connection

Structure : SECC

Drive Cooling : 40mm rear cooling fan x 2 & metal heat dispersion

LCD Indication : Device Power & Drive Activity

LCD Display Color : Green : Device Power ; Amber : Drive Activity

Dimension (L x W x H) : 6.70″ x 5.75 ” x 1.63 ”

Weight : 1.77 lbs

1 comment

  1. It would be great if they offered a SAS / SATA expander / port multiplyer in the back-plane so you could use just one SATA connection.

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