Backups to USB Mass Storage Really, Really Slow

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I have an 200GB external hard drive, which is more than large enough to back
up my whole internal hard drive. Using a USB 2.0 connection, I do back up my
internal hard drive once a week, but due to some weird problem, the back-up
cannot be done under XP in a reasonable amount of time. I have been doing
the back-ups by booting from a boot CD with disk copying software, i.e.
without bringing up Windows XP. When booting from this CD, backing up
everything on my internal hard drive takes about 80 minutes.

Now I know that under a multi-tasking OS like XP, you should expect a
back-up to run a little slower. In my case, however, a back-up of my hard
drive would take an order of magnitude longer. I just tried Norton Ghost
(one of many XP back-up programs I've tried), and Ghost reported that it
would take 14 hours to back up my hard drive! (BTW the backup program that
comes with XP is even worse: it reports that more than a day would be
required to do a full backup).

Clearly, the problem is not the hardware, since I can back up my hard drive
in a jiffy if I boot from CD. I suspect that some driver or *.inf file got
corrupted, but I don't know how to figure out which one. Can anyone advise
me as to how to diagnose and fix this problem?

--
"All things extant in this world,
Gods of Heaven, gods of Earth,
Let everything be as it should be;
Thus shall it be!"
- Magical chant from "Magical Shopping Arcade Abenobashi"

"Drizzle, Drazzle, Drozzle, Drome,
Time for this one to come home!"
- Mr. Lizard from "Tooter Turtle"


.



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