Re: CDROM support in ata_piix?

Jeff Garzik
2004-10-15T19:23:08Z

Doug McNaught wrote:
> I have an IBM server with a SATA controller listed as:
>
> 0000:00:1f.2 IDE interface: Intel Corp. 6300ESB SATA Storage Controller (rev 02)
>
> Debian's 2.6.8 kernel with libata works fine, except that the CDROM
> (which is on a PATA port) does not appear as a SCSI device. It's also
> not seen by the regular IDE driver, because ata_piix has already
> grabbed the i/o resources--I get:
>
> ide0: I/O resource 0x1F0-0x1F7 not free.
> ide0: ports already in use, skipping probe
> ide1: I/O resource 0x170-0x177 not free.
> ide1: ports already in use, skipping probe
>
> Is there any way to get ata_piix to register my CDROM, or
> alternatively to have the regular IDE driver handle it?
>
> This seems to be a known problem (it's filed as a Debian bug)--is it
> fixed in 2.6.9-rc4? I had a look at the -rc4 patch but couldn't tell
> from the diff whether there's anything CDROM-related in there...

Well, two things are going on:

You may need to set CONFIG_BLK_DEV_SATA (or unset it) depending on your
configuration.

Once you get past that, you need to apply the latest libata patch to fix
a related combined mode bug.

http://lkml.org/lkml/2004/10/14/336

Jeff