Andy Hewitt <wildrover.andy@[EMAIL PROTECTED]
> wrote:
> I've spent the night fighting with trying to get my media card readers
> to work. I have a Trust one, a 7dayshop one, and a new one I just got
> off eBay cheap. Not one of them will connect reliably to my G5, and it
> doesn't matter what ****t I use, either on a hub, or a built-in ****t. The
> reader is recognised in Profiler, but they just will not work reliably
> when a card is inserted.
>
> Two of them fail part way through a download, so I can get the images by
> continually reconnecting the reader. One just refuses altogether,
> although it will appear on the desktop, and launches iPhoto, but then
> pops up a message about being disconnected. Subsequent reconnects just
> don't work at all.
Interesting. I've noticed a similar problem with one of my card readers
(an Olympus xD Memory Adapter, model MAUSB-200 - plug an xD card into
the side of something resembling a USB flash drive "stick").
What I observed was a horrible performance hit and/or errors when trying
to copy some files off the 512 MB xD card, while others were OK. It
seemed like it was only able to reliably access part of the memory on
the card.
My other "Silicon Power" multi-card reader works fine, and the Olympus
one used to work, so I assumed that something had gone wrong with the
Olympus one.
The symptoms didn't make sense - the xD card's interface must use a
serial protocol because there aren't enough pins to supply an address to
it in parallel, and the successfully copied files were fine, so how
could a hardware fault with the card reader have difficulty with some
****tion of the card's address space?
> The same cards can be connected and read perfectly when I use the
> cameras directly.
>
> Oh, and the same card readers work fine in 10.4 on an old Sawtooth.
>
> Looking on the Apple forums reveals that I'm not alone, something was
> broke in 10.5 at some point.
Upon further reflection and thanks to your clue I realise that I would
have used the Olympus previously under Tiger and that was probably the
first time I used it under Leopard.
A bug in Leopard's USB Mass Storage Device driver makes a lot more
sense. I'll have to retest this card reader on my PowerMac G4 running
Tiger for confirmation.
I'll do some more tests.
--
David Empson
dempson@[EMAIL PROTECTED]
|
