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SubjectRe: cdrecord dev=ATA cannont scanbus as non-root
On Mon, Nov 29 2004, J.A. Magallon wrote:
> dev=ATAPI uses ide-scsi interface, through /dev/sgX. And:
>
> > scsibus: -1 target: -1 lun: -1
> > Warning: Using ATA Packet interface.
> > Warning: The related Linux kernel interface code seems to be unmaintained.
> > Warning: There is absolutely NO DMA, operations thus are slow.
>
> dev=ATA uses direct IDE burning. Try that as root. In my box, as root:

Oh no, not this again... Please check the facts: the ATAPI method uses
the SG_IO ioctl, which is direct-to-device. It does _not_ go through
/dev/sgX, unless you actually give /dev/sgX as the device name. It has
nothing to do with ide-scsi. Period.

ATA uses CDROM_SEND_PACKET. This has nothing to do with direct IDE
burning, it's a crippled interface from the CDROM layer that should not
be used for anything. scsi-linux-ata.c should be ripped from the
cdrecord sources, or at least cdrecord should _never_ select that
transport for 2.6 kernels. For 2.4 you are far better off using
ide-scsi.

> The scan through ATA lasts much less than with ATAPI, and you can burn with
> dev=ATA:1,0,0 or dev=/dev/burner, which is the new recommended way.

No! ATAPI is the recommended way.

--
Jens Axboe

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