Re: dma errors
On Thursday 20 July 2006 16:52, Ralph Katz wrote:
> Greg Madden wrote:
> > On Wed, 19 Jul 2006 10:29:51 -0600
> >
> > John Schmidt <jaschmidt@uofu.net> wrote:
> >> > Hi,
> >> >
> >> > I have two IDE drives connected together using lvm. The drives are
> >> > quite new, the motherboard is quite old. I put a single ext3
> >> > partition on top of lvm which is used for temporary large data sets.
> >> > I get the following error messages from dmesg:
> >> >
> >> > EXT3 FS on dm-0, internal journal
> >> > EXT3-fs: mounted filesystem with ordered data mode.
> >> > hde: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> >> > hde: dma_intr: error=0x84 { DriveStatusError BadCRC }
> >> > ide: failed opcode was: unknown
> >> > hde: dma_timer_expiry: dma status == 0x20
> >> > hde: DMA timeout retry
> >> > PDC202XX: Primary channel reset.
> >> > PDC202XX: Secondary channel reset.
> >> > hde: timeout waiting for DMA
> >> > hde: dma_timer_expiry: dma status == 0x21
> >> > hde: DMA timeout error
> >> > hde: dma timeout error: status=0x58 { DriveReady SeekComplete
> >> > DataRequest } ide: failed opcode was: unknown
> >> > hde: dma_timer_expiry: dma status == 0x21
> >> > hde: DMA timeout error
> >> > hde: dma timeout error: status=0x58 { DriveReady SeekComplete
> >> > DataRequest } ide: failed opcode was: unknown
> >> > hde: dma_timer_expiry: dma status == 0x21
> >> > hde: DMA timeout error
> >> > hde: dma timeout error: status=0x58 { DriveReady SeekComplete
> >> > DataRequest } ide: failed opcode was: unknown
> >> >
> >> > What would be the source of these errors and how should I go about
> >> > fixing them?
> >
> > A couple of things, the generic IDE driver doesn't do dma , make sure
> > you load the module for your chipset. Using 'hdparm' will
> > show if dma is set for the drives.
>
> While I'm no expert, I believe the standard IDE driver in sarge DOES
> support dma (otherwise my computers would be unusable; hdparm is not
> installed). I've had similar errors on a computer running sarge that
> had hard disk and/or controller h/w problems.
>
> I did not have those dma errors before the hardware problems.
>
> You might install the smartmontools package to test and monitor the
> disks. Perhaps someone else could advise on whether your lvm set-up
> could be a factor.
>
Had 'em too. And smart monitor would also fail when these problems were
occurring. Feared for the disk but so intermittant and no data problems when
it was working. Found that jiggling the cables around could fix or cause it
so replaced the cables. Also clean and firm up all connections. (Turn
everything off first, off course).
Reply to: