4-Bay Enclosure for 3.5in SATA Drives - Thunderbolt 2 - RAID

Bandwidth hungry? Your solution is here:
Quad-bay high capacity storage with lightning fast performance.

Product ID: S354SMTB2R

  • Create high capacity external data storage with four 3.5” SATA drive bays (HDDs are not included)
  • Transfer files at lightning speed of up 20 Gbps with Thunderbolt 2
  • Sleek, ultra compact design – only 4.6” (116 mm) wide – in brushed aluminum to complement your Mac or PC
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  • Achieve ultra secure data redundancy and increased performance with support for hardware RAID 0, 1 and 10
  • Set up instantly – 2 M Thunderbolt cable included
  • HyperDuo Support for near-SSD performance at HDD capacities
  • Built-in fan for optimum heat dissipation
  • Compatible with SATA revisions I/II/III
  • Built-in Thunderbolt daisy chain port
$496.99 USD
2+ In stock
In stock
US: 1 | CA: 1
In stock
Where To Buy

Technical Specifications

Warranty Information
Warranty 2 Years
Bus Type Thunderbolt
Chipset ID Marvell - 88SE9230
Compatible Drive Types SATA
Drive Installation Fixed
Drive Size 3.5in
Fan(s) Yes
Fans 1 - 70 mm
Interface Thunderbolt
Number of Drives 4
Hot Swap Capability No
Max Drive Capacity Currently tested with up to 6TB 7200 RPM hard drives
Maximum Data Transfer Rate 20 Gbps
Supported RAID Modes RAID 0 (Striped Disks)
RAID 1 (Mirrored Disks)
RAID 10 (1+0, Striped set of Mirrored Subset)
JBOD - (Just a Bunch of Disks)
Temperature Alarm No
Type and Rate Thunderbolt 2 - 20 Gbit/s
SATA III (6 Gbps)
Drive Connectors 4 - SATA Data & Power Combo (7+15 pin) Receptacle
Host Connectors 2 - Thunderbolt™ (20-pin) Female
OS Compatibility OS independent; No software or drivers required Note: the enclosure supports software RAID configured within Windows and Mac OS X operating systems
LED Indicators 1 - Power LED
1 - Drive 1 Activity LED
1 - Drive 2 Activity LED
1 - Drive 3 Activity LED
1 - Drive 4 Activity LED
Input Voltage 100 - 240 AC
Output Current 10 A
Output Voltage 12 DC
Plug Type M
Power Consumption (In Watts) 120
Power Source AC Adapter Included
Humidity 20% ~ 80% RH
Operating Temperature 5°C to 35°C (41°F to 95°F)
Storage Temperature -20°C to 50°C (-4°F to 122°F)
Physical Characteristics
Product Height 6.2 in [15.8 cm]
Product Length 7.7 in [19.5 cm]
Product Width 4.6 in [11.6 cm]
Weight of Product 2.6 lb [1.2 kg]
Packaging Information
Package Height 7.8 in [19.7 cm]
Package Length 11.2 in [28.5 cm]
Package Width 11 in [28 cm]
Shipping (Package) Weight 6.2 lb [2.8 kg]
What's in the Box
Included in Package 1 - Thunderbolt 4-bay 3.5in Hard Drive RAID Enclosure
1 - 2m Thunderbolt Cable
3 - Allen key
1 - Universal power adapter (NA / UK / EU)
1 - Instruction manual
Supports any operating system.
No additional drivers or software required.


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4-Bay Enclosure for 3.5in SATA Drives - Thunderbolt 2 - RAID

Customer Reviews

1 (3 reviews)
1 out of 5 stars
Quality of Product
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1 - 3 of 3 Reviews

(1 star) Not compatible with OSX10.14 & up

By: JoBoPo
This enclosure does not work with OSX 10.14 & up. It's going between the drives that won't mount or the MBP that won't sleep, shutdown or reboot. Take your pick, either way it's an expensive paperweight if you are running anything above 10.14...
Comment Helpful? Yes - 0 No - 0 Report
Response from
Matt, Customer Support
We're sorry to hear about the difficulties you're experiencing with our S354SMTB2R. We take reports like this very seriously and we'd like to discuss these issues with you further. Please contact us at where our Technical Advisors are available 24 hours a day, 5 days a week to provide support.

(1 star) AVOID! Doesn't Work on Mac Mojave or PC Win 10

By: johnski
I purchased a few years ago and used on mac Sierra perfectly for 4 independent drives. It has been really good and can't fault it. However Since update to mojave it just wont work even after reformatting drives. tech support says it should but no luck after trying everything as mentioned in other forums and Apple support. It wont even switch on on a windows 10 laptop with thunderbolt 2 (have tried it on 2 separate machines) or a mac mini with a thunderbolt 3 to 2 adapter cable. Seems to be a firmware issue. I have just purchased an OWC 2 bay Thunderbolt 2 caddy and works first time, so that's the solution i'm afraid! Hope that helps others considering this for a newer machine. Look elsewhere.
Comment Helpful? Yes - 1 No - 0 Report
Response from
Stefan, Support
Thank you for taking the time the leave feedback on the S354SMTB2R. We apologize for the issue you've experienced, and we want to help. I see that our support department is already in contact with you and we are happy to continue to work on this issue until we find a solution. We are sorry for the frustration this has caused but we are looking into the case for you and will be reaching out to assist with further troubleshooting.

(1 star) A $496.99 brick - actually two $496.99 bricks!

By: aaprlore
I have two of these enclosures. They worked find with my Mac Pro late 2013 running Mac OSX Sierra. I upgraded to OSX High Sierra, and the eight drives in the two enclosures went MIA! Occasionally, a drive, or two or three, may mount, but after a few minutes it, or they, prematurely eject, hanging up my Mac Pro. One OWC and two Mobius enclosures work just fine with the Mac Pro and High Sierra, but not these StarTech 4-bay enclosures. No one seems to know why. If you plan on using this enclosure with a Mac Pro late 2013 running Mac OSX High Sierra, verify that the drives will mount reliably before you buy - or make sure the vendor will take back the enclosure if it, and the enclosed drives don't function as advertised.
Comment Helpful? Yes - 1 No - 1 Report
Response from
Brian, Customer Support
Thanks for sharing your review. We apologize for the difficulty you encountered. I see you've been in touch with our Tech Support; we're glad you have the product working again. It's difficult to say for certain what caused this glitch. We believe the root cause is likely the switch to the new Apple File System (APFS) that Apple introduced in High Sierra. APFS is the successor to HSF+, the company’s longtime file system for Macs. We're very sorry again for the trouble. All the best!