[pchelpers] Re: Not Detecting Camera

Hi Eric,

Thursday, August 26, 2004, 4:40:24 AM, you wrote:

EF> Well! A gratifying end to this thread. I purchased an 8 in 1 card reader
EF> this morning and tried it out this evening. I found that opening the card
EF> contents and downloading the pictures was simply a breeze. So fast!!
EF> The instructions advise that no drivers are required with WIN XP. However
EF> when I plug it into the USB port/cable an on-screen message tells me that:
EF> "HI-SPEED USB Device Attached To a non-HISPEED HUB! This USB Mass Storage
EF> Device is a HI-SPEED  USB device and will function at reduced speed when
EF> plugged into a non-HI-SPEED PORT. You must add a HI-SPEED USB host
EF> controller to this computer to obtain maximum performance."
EF> Question:- What is a HI-SPEED USB host controller? Is it software?
EF> You folks have been so helpful that I am beginning to expect only expert
EF> advice. Thanks so much to all who responded.
EF> Eric

It occurs to me that you might take this warnimg with a grain of salt
until you check the transfer specs on the card reader; just because
the card reader supports USB 2.0 doesn't mean that it will transfer
data any faster. Some vendors add USB 2 support without changing the
transfer speed. If the specs indicate that it won't transfer data
noticeably faster, then you may want to consider whether the USB 2.0
adapter is worth it.

Also, note that some of the time spent transferring images is overhead
time, and won't be affected noticeably by using a USB 2 adapter. What
you can do is fill up the card with pics, then eject and re-insert the
card, then time how long it takes to copy the pics from the card to
the HD. Then, time how long it takes to copy those pics from where
they are on the HD to another folder on the HD (copy to another HD if
you have more than one). Subtracting will give you a rough
approximation of the maximum (note that word) amount of time that
you'll be able to save each time by going to USB 2.0. Checking the
specs, of course, will tell you if you'll be able to get anywhere near
that maximum.

--Scott.


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