Hi,
On Tuesday 01 May 2007, William Thompson wrote:
> On Tue, May 01, 2007 at 09:04:46AM -0400, Mark Lord wrote:
> > William Thompson wrote:
> > >
> > >+scsi2 : ata_piix
> > >+ata_port_schedule_eh: port EH scheduled
> > >+ata_scsi_error: ENTER
> > >+ata_port_flush_task: ENTER
> > >+ata_port_flush_task: flush #1
> > >+ata2: ata_port_flush_task: flush #2
> > >+ata2: ata_port_flush_task: EXIT
> > >+ata_eh_autopsy: ENTER
> > >+ata_eh_recover: ENTER
> > >+ata_eh_prep_resume: ENTER
> > >+ata_eh_prep_resume: EXIT
> > >+__ata_port_freeze: ata2 port frozen
> > >+ata_std_softreset: ENTER
> > >+ata_std_softreset: about to softreset, devmask=1
> > >+ata_bus_softreset: ata2: bus reset via SRST
> > >+ata_dev_classify: found ATA device by sig
> > >+ata_dev_classify: unknown device
> > >+ata_std_softreset: EXIT, classes[0]=1 [1]=5
> > >+ata_std_postreset: ENTER
> > >+ata_std_postreset: EXIT
> > >+ata_eh_thaw_port: ata2 port thawed
> > >+ata_eh_revalidate_and_attach: ENTER
> > >+ata2.00: ata_dev_read_id: ENTER, host 2, dev 0
> > >+ata_exec_command_pio: ata2: cmd 0xEC
> > >+ata_hsm_move: ata2: protocol 2 task_state 1 (dev_stat 0x51)
> > >+ata_hsm_move: ata2: protocol 2 task_state 3 (dev_stat 0x51)
> > >+ata_port_flush_task: ENTER
> > >+ata_port_flush_task: flush #1
> > >+ata2: ata_port_flush_task: flush #2
> > >+ata2: ata_port_flush_task: EXIT
> > >+ata2.00: failed to IDENTIFY (I/O error, err_mask=0x1)
> > >+ata_eh_revalidate_and_attach: EXIT
> > ..
> >
> > Yep. Libata seems to be treating the ATAPI drive as ATA.
> >
> > Tejun, don't we have a fallback for when IDENTIFY fails?
> > If the drive rejects it (err=0x04), then this can mean only one thing:
> > unsupported command, so we next must try PACKET_IDENTIFY.
>
> Is it doing that just for this drive? I use libata on another machine (Dell
> Dimension 2400) and it finds the cdrom just fine.
>
> The one thing I do know, the machine with the non-working libata cdrom also
> does not work with the ide driver *ONLY IF* DMA is turned on.
Please give 2.6.21 kernel w/ IDE subsystem and DMA enabled a try
(2.6.21 kernel contains some important updates for both piix IDE driver
and DMA tuning code).
Also there is a newer firmware for this drive (PD03, your drive uses PD02),
although the changelog doesn't say anything about DMA problems it wouldn't
hurt to give it a try:
http://support.us.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=R20664&formatcnt=1&libid=0&fileid=20516
Thanks,
Bart
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
