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Windows 7: usb 3.0 EXTREMELY slow transfer rates

07 Jan 2011   #21
Mike Connor

Several, including Windows 7 x64 Ultimate
 
 

Quote   Quote: Originally Posted by MilesAhead View Post
Quote   Quote: Originally Posted by Mike Connor View Post
My motherboard supports USB 3.0 directly, so I can use any 3.0 USB device. Some work fine, some don't. Just how it is!

For external storage I now mostly use eSATA.

Regards....Mike Connor
I've heard in many cases the add-in card is better than on board native USB 3.0 since the add-in card hardware does the work. But it probably varies with the system. That could explain why I see a lot of surprise how slow USB 3.0 is.

I think there was a bit of a scrabble for manufacturers to produce results for USB 3.0 and this resulted in some less than optimal solutions.

The USB 3.0 ports on my machine work fine and with the right device everything is pretty fast. However, no device has yet been as fast as my eSATA ports.

I also tried a few add in cards on various machines, some worked great, others less so, and every drive is of course different.

I will stick with eSATA for the nonce for my personal machine.


Regards....Mike Connor


My System SpecsSystem Spec
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07 Jan 2011   #22
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

The eSata results are interesting. I got a 30% better performance with USB3 than USB2 when imaging a 40GB partition with Macrium. The disk I used is a 5400 RPM model that I reovered from a laptop when I put the SSD in.
I am now looking for a cheap SSD with 200+ MB/sec write speed to try that out.
My System SpecsSystem Spec
07 Jan 2011   #23
MilesAhead

Windows 7 32 bit
 
 

Quote   Quote: Originally Posted by Mike Connor View Post
...

The USB 3.0 ports on my machine work fine and with the right device everything is pretty fast. However, no device has yet been as fast as my eSATA ports.

I also tried a few add in cards on various machines, some worked great, others less so, and every drive is of course different.

I will stick with eSATA for the nonce for my personal machine.


Regards....Mike Connor
I haven't had any PCs with esata to try. I'm lazy so I buy the off the shelf towers.

It is kind of strange. I remember seeing a video from BlacX docking station about their new USB 3.0 docks. It showed a file transfer of a 700 MB video file. First they did with USB 2.0 then 3.0 dock. The 3.0 dock only looked about 3 times faster from the progress bar. When I purchased the USB 3.0 stuff I figured if I got the 3x result like in the video I'd be happy. Pleasantly surprised when I plugged in the new Caviar Black 6 Gb 64 KB cache drives and got about 5x performance compared to the 2.0 dock. One of those nice times when it wasn't as advertised but better.
My System SpecsSystem Spec
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10 Jan 2011   #24
mjf

Windows 7x64 Home Premium SP1
 
 

We did some tests here which may be of interest.
USB Thumb Drive vs Portable HDD
A USB 2 portable drive gives around 30MB/s on sequential tests. But as packet size changes so does speed as you might expect. Other speed limiting factors (head movements) take over.
You may be interested in doing some comparisons with the same tool -
Download Center - Crystal Dew World
My System SpecsSystem Spec
10 Jan 2011   #25
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

I am still confused about what some people say that eSata ia a lot faster than USB3. Both attachment options have a lot more data transfer capability than a spinning disk can supply. So it should be the disks that limit the speed and not the attachment. Could it be a difference in the capability of the enclosures?
My System SpecsSystem Spec
10 Jan 2011   #26
pparks1

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by whs View Post
I am still confused about what some people say that eSata ia a lot faster than USB3. Both attachment options have a lot more data transfer capability than a spinning disk can supply. So it should be the disks that limit the speed and not the attachment. Could it be a difference in the capability of the enclosures?
There is CPU overhead and such involved over the USB bus. I use eSATA at work and at home and I get speeds of over 100MB/sec throughout most of my Samsung SpinPoint 7200 RPM 2TB hard drive.

I've seen posts from people online that got about 20-25MB/sec over USB 2, then around 60-70MB/sec over USB 3 and nearly 90MB/sec over eSATA using the same hard drive and just moving it from enclosure to enclosure.
My System SpecsSystem Spec
10 Jan 2011   #27
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Yeah, but how much CPU overhead can there be. On the system where I have both eSata and USB3 ports, I have an i7 processor. Do you think the CPU could make such a big difference?

I have a USB3 enclosure but not an eSata enclosure. But if it were worth my money, would buy one. That's why I am so interested in the subject.
My System SpecsSystem Spec
10 Jan 2011   #28
pparks1

Windows 7 Ultimate x64
 
 

The enclosure that I use is a Thermaltake BlacX. Newegg.com - Thermaltake BlacX ST0005U External Hard Drive SATA Enclosure Docking Station 2.5” & 3.5” USB 2.0 & eSATA

I've seen it as low as $20 at NewEgg when on sale.

As far as the comments about CPU overhead, I recall this being a main issue between FireWire and USB 2. Firewire is often faster as it requires less CPU overhead.
My System SpecsSystem Spec
10 Jan 2011   #29
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Thanks. That looks like a nice enclosure. I'll keep an eye on it.
My System SpecsSystem Spec
10 Jan 2011   #30
mjf

Windows 7x64 Home Premium SP1
 
 

CPU overhead? What significant processing is being carried ?
I believe it's packet size, (fragmentation of the file), location on the disk and communications channel speed. There is a significant speed difference between inside and outside track (full vs empty disk).
quanzaboy,
using a common test package (CrystalDiskinof in this case) and the results of Tonytiger2004 and mine linked to above may give you a better indication if the communication channel (USB3) has a key role in this situation.
For the sequential test, I would expect a speed increase over the USB2 figures.
My System SpecsSystem Spec
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 usb 3.0 EXTREMELY slow transfer rates




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