W. eWatson wrote:
> SC Tom wrote:
>>
>> "W. eWatson" <wolftracks@invalid.com> wrote in message
>> news:hk863j$j13$1@news.eternal-september.org...
>>> I'm making the transfer right now. Maybe I plugged it into a USB 1.0
>>> port? I'd swear I did a 4.6G in well under an hour a week ago. Is
>>> there a way to tell if I'm using 1.0 or 2.0?
>>>
>>> BTW, is there a way to pause the xfer?
>>
>> Open device manager (Start, run, type in devmgmt.msc and press Enter)
>> and go to Universal Serial Bus Controllers. Look for an entry labeled
>> Standard Enhanced PCI to USB Controller, or something similar with the
>> word Enhanced. That would mean you have USB2.0 installed. You may also
>> have 1.0, but not likely unless it's an older motherboard. If it is,
>> the front of the case ports are more likely to be 1.0 than the rear
>> ports.
> I have 2.0 installed. I'm pretty sure it's in the back, which where I
> have the HD installed. I'll look at the Device Mgr.
>
> It could take months to get my new Win 7 machine set up. Yikes.
It should take roughly 3.6 hours to transfer 13GB at USB1.1 rates.
USB 1.1 manages about 1MB/sec for transfers, compared to 30MB/sec
if you are using USB 2.0. That "Enhanced" entry makes a difference
You can use UVCView to check the current connection rate. The naming
scheme in USB, leaves a bit to be desired.
http://en.wikipedia.org/wiki/USB
# A *low* speed rate of 1.5 Mbit/s (~183 KB/s) is defined by USB 1.0.
It is very similar to "full speed" operation except each bit takes 8 times
as long to transmit. It is intended primarily to save cost in low-bandwidth
human interface devices (HID) such as keyboards, mice, and joysticks.
# The *full* speed rate of 12 Mbit/s (~1.43 MB/s) is the basic USB data rate
defined by USB 1.1. All USB hubs support full speed.
# A *hi-speed* (USB 2.0) rate of 480 Mbit/s (~57 MB/s) was introduced in 2001.
All hi-speed devices are capable of falling back to full-speed operation if
necessary; they are backward compatible. Connectors are identical."
I was using UVCView just yesterday, while running Win2K on the machine, and
noticed the dreaded "full speed" indication on my external USB enclosure. I
used Device Manager to reinstall the USB and finally got it back to "hi-speed".
"Full speed" gives 1MB/sec practical transfer rate. "Hi-speed" gives 30MB/sec.
Storage devices really shouldn't be running in the "low" speed option.
Paul