What's the point of USB 3.0 HDD Enclosures?

[jaqie]

Ive seen fake chinese crap with those faked on it. Even with fake serial numbers, with all using the same number. Anyone could buy a batch of them and resell them here, so always get the parts from a reputable place, or at least one you can return them to.

 

[nightspydk]

I highly dispute mate you get 68 on usb 2,0. Usb 3,0 on the other hand. Depends on everything used for the connection. I get 100 + on my usb 3,0 burst not sustained.

Usb 3,0 is no doubt to be recommended. Sustained you won't get past 40 on a usb 2,0 confirmed.

I can substantiate that and usb 3,0 is far better that 2,0 since 2,0 might have a fast speed in theory while in praksis you won't exceed the 40 mentioned and you will definately with usb 3,0. Spindle speed, seek times etc do matter but with fast discs 3,0 all the way.

To give you an exsample I have a fast small samsung mechanical drive and burst it will go almost as fast as an ssd. That won't happen with usb 2,0.

 

[Zap]

Not enough power for the drive.

Either the controller board is limited somehow (usb3 powered not wall wart powered) or you are using a wall wart that is just not able to supply enough to give a stable voltage for drive spinup. Try a wall wart that works with that drive on another controller for sure.

You'd be amazed how many wall warts that come with things are incapable of powering up most drives.

One of my enclosures is a 2.5" model (notebook HDD). It works bus-powered on USB 2.0, meaning it doesn't draw more than 500mA. USB 3.0 spec calls for 900mA to be available.

Also, one of the motherboards that has issues with my external HDDs also had problems with USB 3.0 flash drives.

This marking

or this marking

on the AC adapter. Don't accept less. If the manufacturer cared enough to provide a UL approved adapter, it likely cared enough about the quality of the interface circuitry.

Also some enclosures may use USB 3.0 - SATA bridge chips that are not compatible with all ports.

And you think a PSU (even wall wart) manufacturer would be above faking labels? Not to mention all the "crappy" PSUs that have fake wattage. Oh hey, even UL acknowledges existence of fake labels. You think a company that wants to fake a label can't make one that follows guidelines?

Okay, sometimes they can't.

 

[nightspydk]

I'm confident a lot of problems with external 3,0 drives has something to do with power. Maybe you'll figure it out, because I haven't seen that yet.

 

[bryanl]

And you think a PSU (even wall wart) manufacturer would be above faking labels? Not to mention all the "crappy" PSUs that have fake wattage. Oh hey, even UL acknowledges existence of fake labels. You think a company that wants to fake a label can't make one that follows guidelines?

Okay, sometimes they can't.

I have a Chinese AC adapter where they didn't even spell 'China' right; instead it came out as 'Chian'

Most producers of garbage are reputable enough to leave off any safety approval markings, while most dishonest producers print 'UL' with no registration number, rather than a fake number (UL shows no company associated with it) or a real number on an unapproved product (I saw that for a 'Toshiba' laptop AC adapter). The claimed power ratings tend to be higher than those of larger, heavier genuinely approved products.

 

[Zap]

I'm confident a lot of problems with external 3,0 drives has something to do with power. Maybe you'll figure it out, because I haven't seen that yet.

So my USB 3.0 flash drive isn't getting enough power? :hmm: I wasn't aware that they were so power hungry.

 

[nightspydk]

I don't know mate, it's more of a feeling having seen problems with 3,0 drives many times. Apparently also there is a low power variant.

 

[JackMDS]

It seems like there's something wrong with your USB 3.0 drives. They are not operating at USB 3.0 speed.

Yeah, it can put in general this way, but the problem is more general.

Some small vendors do not use the right hardware and simply lie in order to sell.

However, the majority of the info that we get is plagued by a different issue.

Most of the numbers in aspect of computer's Technology are statement derived from the core inner work of the core Chipsets and Not from the functional out put.

Most of know that telling the size of the car's engine does not necessarily correspond to the speed that the vehicle can achieve, but we ignore this knowledge when it involves computer's technology.

As an example let me use WIFI.

When you read the specs of WIFI devices almost all of them state 300 feet indoor coverage.

Do you know any one who really get 300 feet in real indoor environment?

However, if you put an Access Point in a space like inside a Boeing 787's hangar it might work for 300 feet and you can call it indoor.

I.e., it all a matter of honestly disclosing the condition of the specs testing.

In other words, you can Not be successful in life without understanding what is behind the Marketing and how numbers and words are used to confuse the customers.