Re: `dd` problem from cdrom

Rafael Espíndola
2005-03-16T21:17:39Z

On Wed, 16 Mar 2005 15:31:14 +0100, Colin Leroy <colin@colino.net> wrote:
> Hi,
>
> Using 2.6.10 and 2.6.11, trying to use dd from the ide cdrom in my
> Ibook G4 fails like this:

> /dev/hdc:
> HDIO_GET_MULTCOUNT failed: Invalid argument
> IO_support = 0 (default 16-bit)
> unmaskirq = 1 (on)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 256 (on)
> HDIO_GETGEO failed: Invalid argument
I have a cdrom drive that does not work with DMA. Maybe yours has the
same problem.

> I didn't try older kernels yet; Any idea about this? Is it a kernel bug
> or a configuration issue?
> --
> Colin
Rafael