Re: DMA problem

[DOSProfi]

There are many reasons for this Problem. Which Kernel Version are you running
(uname -a). Which distribution? SuSE, Debian, Mandrake, RedHat?

On Friday 16 January 2004 20:24, claude parisot wrote:
>   Hello !
>
> Sorry to post a seconfd message on the list, I am only trying
> to get an answern for this - it seems so - DMA-problem ??
>
>
> I have some
> problems with a brand new Plextor-drive, PX-W5224TA/T3B, I cannot
> mount any CD or burn a CDR or CD-RW, except if I disable DMA with
> following command :# hdparm -d0 /dev/hdd , a little bit annoying,
> isn't it ?
>
> If I insert a cdrom in the drive the led doesn't go out, it flashes
> as usual but it stays green.
>
> It seems to be a DMA-problem or a kernel-bug ???
> Its only a supposition, I am a Linux-newbie, and I am looking
> for an explanation and a solution ....
>
> By mounting a cdrom I get following error messages :
>
> Jan 11 20:46:00 ishwara kernel: scsi : aborting command due to timeout
>
> : pid 102, scsi0, channel 0, id 1, lun 0 0x28 00 00 00 00 10 00 00 01 00
>
> Jan 11 20:46:00 ishwara kernel: hdd: error waiting for DMA
> Jan 11 20:46:00 ishwara kernel: hdd: dma timeout retry: status=0x7f {
> DriveReady DeviceFault SeekComplete DataRequest CorrectedError Index
> Error } Jan 11 20:46:00 ishwara kernel: hdd: dma timeout retry:
> error=0x7f Jan 11 20:46:00 ishwara kernel: hdd: DMA disabled
> Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
> Jan 11 20:46:00 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
> Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
> Jan 11 20:46:00 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
> Jan 11 20:46:00 ishwara kernel: hdd: ATAPI reset complete
> Jan 11 20:46:07 ishwara kernel: hdd: irq timeout: status=0x80 { Busy }
> Jan 11 20:46:07 ishwara kernel: scsi0 channel 0 : resetting for second
> half of retries. Jan 11 20:46:07 ishwara kernel: SCSI bus is being reset
> for host 0 channel 0. Jan 11 20:46:07 ishwara kernel: hdd: status
> timeout: status=0x80 { Busy } Jan 11 20:46:07 ishwara kernel: hdd: drive
> not ready for command Jan 11 20:46:07 ishwara kernel: hdd: ATAPI reset
> complete Jan 11 20:46:32 ishwara kernel: scsi : aborting command due to
> timeout : pid 103, scsi0, channel 0, id 1, lun 0 0x28 00 00 00 00 10 00
> rive not ready for command
>
> And then I have a freeze or at least a blocking of the sysem.
> I have to reboot.
>
> Could someone give me an explanation of what is happening and a way to
> solve the problem .... is this a kernel-bug ? Or an incompatibility
> between the motherboard and the drive ??
>
> If you choose to help me, please don't be to esoteric, as I already
> said, I am a newbie.
>
> Please, could you Cc all answers to the adress :
>
> Claude.PARISOT@xxxxxxxxxx
>
> My apologizes for my english ....
>
>
> Claude
>
> System : Pentium 2,8C
> Asus P4P800 DeLuxe
> Intel I865PE
>
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