Re: dma errors

[Greg Madden <gomadtroll@gci.net>]

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.


-- 
Greg Madden