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Rob Beard wrote: > Simon Williams wrote: >> I've got a PCMCIA CF reader and a CF SD reader. To clarify: >> SD Card --> CF card --> PCMCIA card --> laptop >> >> This works fine, except for a pretty annoying problem. Whenever the >> system uses the card (reading or writing) everything else grinds to a >> halt. It's like the kernel ignores everything else whilst the card is in >> use. This is a minor irritation when using small files, but I'm usually >> copying a whole pile of stuff to or from it, and the system is unusable >> whilst that is happening. > I take it the card comes up as a block device, and isn't Compact Flash > basically an IDE device? I'm not quite sure how it works with those IDE-CF readers you can get, but CF cards are essentially small PCMCIA cards or so I think. Remember that you can also get CF wifi cards, etc, which show up the PCMCIA/cardbus system. > Could it be related to DMA? How do I go about checking? > I can't help but think it's a rather long winded way of reading an SD > card. Well, not really. The whole thing is still the same size as a PCMCIA card. Consider it as a PCMCIA card that can read both SD and CF cards (both of which I use, I just don't have an ordinary CF card to test it with at the moment). > Wouldn't a USB SD card reader be a more elegant solution? (or > doesn't the laptop have USB?). I can leave the PCMCIA card in the laptop when I'm not using it, so I don't have to carry around a bunch of USB dongles. I've got a retractable PCMCIA bluetooth card as well for the same reason (though I have to leave it out at the moment because it doesn't like suspending). Thanks Simon -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html