USB Speed

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Guest

Hi all

I' just like to know how fast a usb 2.0 port meant to be.
When I' transfer, say a video file 6.7GB, from one external
drive to another external drive both usb 2.0,
it takes around 14 minutes.
Does that mean the USB port is 2.0 or 1.0, 1.1?

Thank you
 
Look in Device Manager under USB Controllers. If it says "Enhanced" you've
got USB2, if not USB1.
Quoted from web page:
"4. How fast is USB 2.0?
USB 2.0 has a raw data rate at 480Mbps, and it is rated 40 times faster than
its predecessor interface, USB 1.1, which tops at 12Mbps. Originally, USB
2.0 was intended to go only as fast as 240Mbps, but in October 1999, USB 2.0
Promoter Group pumped up the speed to 480Mbps."
 
chris said:
Hi all

I' just like to know how fast a usb 2.0 port meant to be.
When I' transfer, say a video file 6.7GB, from one external
drive to another external drive both usb 2.0,
it takes around 14 minutes.
Does that mean the USB port is 2.0 or 1.0, 1.1?

Thank you
Click to expand...


chris:
Sounds about right for USB 2.0 (*real-life*) data transfer speed. It would
be much, much slower if your system was running at USB 1 - 1.1 speed.

Here are some USB 2.0 speed tests we ran a few months ago...

Speed tests (all averages) involved copying data from the internal HDD to
the USB device and vice versa using a 1 GB flash drive and a couple of 1"
minidrives (6 GB & 8 GB). The "test" involved 1 GB of data (12 folders
comprising 503 files). The desktop PC involved was a medium-powered one with
512 MB of DDR2 RAM.

Flash drive
Copying from HDD to flash drive -- 200 MB/min
" " flash drive to HDD -- 250 MB/min

Minidrives
Copying from HDD to minidrive -- 430 MB/min
" " minidrive to HDD -- 500 MB/min

Note the considerably faster data transfer speed with minidrives.


Copying from HDD to USB external HDD - 1 min 28 sec (680 MB/min)

On another slightly higher-powered machine with 1 GB of RAM) it took 2 min
16 sec - (882 MB/min) to copy 2 GB of data from the internal PATA HDD to a
USB external HDD.

Using the same PC but with a SATA GB HDD connected as a USB device it took 1
min 50 sec - (1.1 GB/min) to copy the same 2 GB of data.

Using the same SATA HDD but this time connecting it with direct SATA-to-SATA
capability, the 2 GB of data was copied in 55 sec - (2.2 GB/min).

In the 12/06 or 1/07 issue of PCWorld they reported that when they recently
tested USB external HDDs the average data transfer rate was 3.06 GB in 152
seconds which works out to about 1.2 GB/min. That was considerably faster
than what we got with PATA HDDs in USB external enclosures although
virtually identical with what we got when we used a SATA HDD as a USB
device.
Anna
 
Anna said:
chris:
Sounds about right for USB 2.0 (*real-life*) data transfer speed. It would
be much, much slower if your system was running at USB 1 - 1.1 speed.

Here are some USB 2.0 speed tests we ran a few months ago...

Speed tests (all averages) involved copying data from the internal HDD to
the USB device and vice versa using a 1 GB flash drive and a couple of 1"
minidrives (6 GB & 8 GB). The "test" involved 1 GB of data (12 folders
comprising 503 files). The desktop PC involved was a medium-powered one with
512 MB of DDR2 RAM.

Flash drive
Copying from HDD to flash drive -- 200 MB/min
" " flash drive to HDD -- 250 MB/min

Minidrives
Copying from HDD to minidrive -- 430 MB/min
" " minidrive to HDD -- 500 MB/min

Note the considerably faster data transfer speed with minidrives.


Copying from HDD to USB external HDD - 1 min 28 sec (680 MB/min)

On another slightly higher-powered machine with 1 GB of RAM) it took 2 min
16 sec - (882 MB/min) to copy 2 GB of data from the internal PATA HDD to a
USB external HDD.

Using the same PC but with a SATA GB HDD connected as a USB device it took 1
min 50 sec - (1.1 GB/min) to copy the same 2 GB of data.

Using the same SATA HDD but this time connecting it with direct SATA-to-SATA
capability, the 2 GB of data was copied in 55 sec - (2.2 GB/min).

In the 12/06 or 1/07 issue of PCWorld they reported that when they recently
tested USB external HDDs the average data transfer rate was 3.06 GB in 152
seconds which works out to about 1.2 GB/min. That was considerably faster
than what we got with PATA HDDs in USB external enclosures although
virtually identical with what we got when we used a SATA HDD as a USB
device.
Anna
Click to expand...

Thanks for taking the time Anna.

This is the answer I' was looking for.
The Device Manager has one SiS 7002 USB 2.0 Enhanced Host Controller
and three SiS 7001 PCI to USB Open Host Controllers.
My computer has four USB ports, so I' wasn't sure if only one of them is 2.0
or all of them.
The best way to be sure I' guess, is to test each one of them,
and I' thought it was to slow when I' did.
Well I'll wait for USB 3.0
At least now I' know they are 2.0

Thanks again
Chris
 
Kenny said:
Look in Device Manager under USB Controllers. If it says "Enhanced" you've
got USB2, if not USB1.
Quoted from web page:
"4. How fast is USB 2.0?
USB 2.0 has a raw data rate at 480Mbps, and it is rated 40 times faster than
its predecessor interface, USB 1.1, which tops at 12Mbps. Originally, USB
2.0 was intended to go only as fast as 240Mbps, but in October 1999, USB 2.0
Promoter Group pumped up the speed to 480Mbps."
Click to expand...

Thanks for your reply Kenny

The Device Manager has one SiS 7002 USB 2.0 Enhanced Host Controller
and three SiS 7001 PCI to USB Open Host Controllers.
My computer has four USB ports, so I' wasn't sure if only one of them is 2.0
or all of them.

Anna's tests made it clear

Thanks anyway
 
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