Messages in this thread | | | Date | Sat, 1 Aug 2009 17:52:18 +0200 | From | Andreas Mohr <> | Subject | Re: Extremely slow IO with a PCMCIA CompactFlash adapter |
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Hi,
> Is this expected behavior? Is there any setup I am missing that would make this faster?
No, certainly not, I don't remember it to be this slow (it's been a while since I last tried though, still have hardware here). Possibly it's a DMA misdetection problem (keeps trying to use DMA despite it not being possible) which is common with CF type setups. Try fiddling with hdparm or blktool DMA-related or I/O setup settings. Other things would include libata.dma=0 (or other values!) for libata layer or ide-core.nodma= boot parameter (for IDE layer).
And if this indeed is the problem, then it would be very useful to get automatic handling implemented properly.
Andreas Mohr
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