Write speed problem on hard disk enclosure

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Sina Tavakoli

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Jul 27, 2015
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Hello everyone,
So I recently bought a new laptop and replaced its hard drive with a SSD one I decided to use the old one as an external drive by putting it in a hard disk enclosure so I bought a so called "USB 3.0" Omega 2.5'' hard disk enclosure (I guess the brand is not that popular). This works fine, but I have a problem with its write speed, the max I can get is just 15 Mb/s! Isn't it supposed to be USB 3.0 ? I mean the famous 100 Mb/s speed? So I have some guesses, the main one: since this enclosure only gets a USB 3.0 port as its input wouldn't It left behind with inefficient power? If so, how can I solve this? And another question: how manufactured portable hard drives can reach this speed with just a USB 3.0 port and I cannot with this approach?

PS: there is no problem in reading speed, it gets around 100 Mb/s
 
Solution
IInuyasha74
First, be sure that the port you are plugging it into is USB 3.0 compliant. If it is plugged into a USB 2.0 port then it will only work at best at USB 2.0 speeds.

If it is in a USB 3.0 slot, then the issue could be several things. The HDD may just be unusually slow. That is extremely slow for an HDD, but some drives can have that issue when they are getting older or faulty. The controller card inside of the Omega device you bought also may not be capable of running at high speeds. Cheap off brand companies do this sometimes, using USB 3.0 controllers that are exceptionally poor chips and not able to really transfer at USB 3.0 speeds. They also could of used a USB 2.0 chipset inside and just claimed it to be a USB 3.0.
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IInuyasha74

IInuyasha74

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May 1, 2013
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First, be sure that the port you are plugging it into is USB 3.0 compliant. If it is plugged into a USB 2.0 port then it will only work at best at USB 2.0 speeds.

If it is in a USB 3.0 slot, then the issue could be several things. The HDD may just be unusually slow. That is extremely slow for an HDD, but some drives can have that issue when they are getting older or faulty. The controller card inside of the Omega device you bought also may not be capable of running at high speeds. Cheap off brand companies do this sometimes, using USB 3.0 controllers that are exceptionally poor chips and not able to really transfer at USB 3.0 speeds. They also could of used a USB 2.0 chipset inside and just claimed it to be a USB 3.0.
 
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