Re: 2.6.16-rc1-mm2 pata driver confusion

From: Ed Sweetman
Date: Tue Jan 24 2006 - 17:59:40 EST


Randy.Dunlap wrote:

On Tue, 24 Jan 2006, Ed Sweetman wrote:



Alan Cox wrote:



On Maw, 2006-01-24 at 01:43 -0500, Ed Sweetman wrote:




problem. The problem is that there appears to be two nvidia/amd ata
drivers and I'm unsure which I should try using, if i compile both in,
which get loaded first (i assume scsi is second to ide) and if i want my
pata disks loaded under the new libata drivers, will my cdrom work under
them too, or do i still need some sort of regular ide drivers loaded
just for cdrom (to use native ata mode for recording access).




The goal of the drivers/scsi/pata_* drivers is to replace drivers/ide in
its entirity with code using the newer and cleaner libata logic. There
is still much to do but my SIL680, SiS, Intel MPIIX, AMD and VIA boxes
are using libata and the additional patch patches still queued




1. Atapi is most definitely not supported by libata, right now.




It works in the -mm tree.




Intriguing, when I had no ide chipset compiled in kernel, only libata
drivers, I got no mention at all about my dvd writer. I even had the
scsi cd driver installed and generic devices, still nothing seemed to
initialize the dvd drive. It detected the second pata bus but no
devices attached to it.

this is using the kernel mentioned in the subject header.
2.6.16-rc1-mm2. using the amd/nvidia drivers for pata and sata.

Is there anything i can do to give more info to the list to figure out
why my atapi writer is being ignored by pata even when there are no ide
drivers loaded?



Currently you need to use libata.atapi_enabled=1
(assuming that libata is in the kernel image, not a loadable module).

I just built/tested this also, working for me as well.
(hard drives, not ATAPI)


I assume libata.atapi_enabled=1 is a boot arg, not some structure member in the source for the pata driver that i need to set to 1, correct?

And you just built and tested it, how did you test if the atapi argument worked when you then say "not ATAPI" as something you tested?

In any case, i'll try out libata.atapi_enabled=1 and see if it detects the dvd drive.



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