kernel, K3b: poor CDROM burning from usb_storage device

[Gene Heskett]

On Wednesday 03 November 2004 21:45, Kim Lux wrote:
>Try as I might, I can't get k3b to burn data that resides on a USB
>storage device on the fly.  (ie a USB connected IDE hard drive)
>
>I attain read speeds of 25MB/sec with this device when copying files
>from the USB storage device.  The CPU overhead associated with such
>copies is about 3% on my machine.
>
>Also K3B is exhibiting poor burning performance even when burning
> from an image on the internal hard drive.  The CDROMs are rated at
> 16x burning.  I could only burn them at 8x without experiencing a
> buffer underflow.
>
>I burnt the same CDROMs at 16 or 24x last week with a different
>kernel.
>
>I'm running 2.6.9-1.649 smp today.

>From the description, it sure sounds like the DMA for the cdwriter got 
turned off somehow.  What does hdparm say?

>
>--
>Kim Lux (Mr.)  Diesel Research Inc

-- 
Cheers, Gene
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