Soren, (sorry, don't know how to get my machine to do your name correctly).
Have you turned off ReadyBoast (should not have been turned on but never
know)
Have you turned off write caching (optimize for quick removal in policies of
the drives properties).
Have you done a full test/repair of the hard disk (properties tools
errorchecking).
Security settings check, owner should be SYSTEM. SYSTEM and administrators
should have full control.
There are reported problems resulting in this error due to SATA BIOS that
need to be updated, suppose that your BIOS could have some similar problem
in its USB operations (I don't recall you saying the drive is connected via
USB, my assumption).
USB drivers (not BIOS stuff) may also need to be updated from your
manufacturer.
I believe that formating leaves the partion table stuff alone, you might
consider deleting the partion, repartioning and then formating.
All long shots - but you don't seem to be getting anywhere anyway so I drop
in my 2 cents.
Michael
"Søren Andersen" <SrenAndersen@discussions.microsoft.com> wrote in message
news:82514030-05D1-4275-9059-BB305C985BBF@microsoft.com...
>I formatted my harddrive (not quick-format - a real one) and it didn't
>help.
> In fact, the error comes at almost exactly the same time as before...
>
> Regards,
>
> Søren G. Andersen
>
> "freddy" wrote:
>
>> Soren,
>>
>> Try reformatting My Book to NTFS using Disk Management in Vista. Post
>> back
>> on results.
>> --
>> freddy
>>
>>
>> "Søren Andersen" wrote:
>>
>> > Freddy,
>> >
>> > Unfortunately, it seemed not to work. Thought I managed to copy 1 700mb
>> > file
>> > to the drive after using the update, further copying after that was
>> > unsuccessful. (Trying from 3 different harddrives, one of them
>> > external, to
>> > make sure it wasn't from my source-drives I had the problem)
>> >
>> > Is it possible each file corrupts something?
>> > It seems strange, at any rate...
>> >
>> > Anyway, thanks for the tip - unfortunately, no dice. 
>> >
>> > Regards,
>> >
>> > Søren
>> > "freddy" wrote:
>> >
>> > > Soren,
>> > >
>> > > The following update MAY help:
>> > >
>> > > http://www.microsoft.com/downloads/d...displaylang=en
>> > >
>> > > Post back on results.
>> > > --
>> > > freddy
>> > >
>> > >
>> > > "Søren Andersen" wrote:
>> > >
>> > > > After first converting my My Book from FAT32 to NTFS, I started
>> > > > copying files
>> > > > to it, which was fine for about 120gb.
>> > > >
>> > > > Then, suddenly, I get these I/O errors.
>> > > >
>> > > > I've tried EVERYTHING. I didn't have System Restore on, so I
>> > > > couldn't remove
>> > > > it, and put it on again. But, just to be safe, I turned it on, made
>> > > > a
>> > > > restorepoint, and turned it off again...
>> > > >
>> > > > I've tried deleting INFCACHE.1 in windows\inf.
>> > > >
>> > > > Nothing worked.
>> > > >
>> > > > Then I hooked it up to my Windows XP machine, and it works great.
>> > > >
>> > > > So, now I have an external harddrive - which, on the box, says
>> > > > "Works with
>> > > > Windows Vista" - that works on Windows XP, but not Vista...
>> > > >
>> > > > Seriously.
>> > > >
>> > > > Someone - please, help me!
>> > > >
>> > > > Regards,
>> > > >
>> > > > Søren