Re: DMA errors writing to IDE disk

[Alejo Sanchez <alejos@fibertel.com.ar>]

Seems your HD doesn't support udma, see:
http://www.quantum.com/products/archive/bigfoot_cy/bigfoot_cy_specs.htm

but somehow the pciide driver thinks it does.

Try disabling "pciide" driver to use "wdc" driver.

John Saylor wrote:
> Apr  2 09:31:43 boston /bsd: pciide0 at pci0 dev 1 function 1 "Intel 82371AB IDE (PIIX4)" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
> Apr  2 09:31:43 boston /bsd: wd0 at pciide0 channel 0 drive 0: <QUANTUM BIGFOOT_CY4320A>
> Apr  2 09:31:43 boston /bsd: wd0: can use 32-bit, PIO mode 4, DMA mode 2
> Apr  2 09:31:43 boston /bsd: wd0: 32-sector PIO, LBA, 4134MB, 8960 cyl, 15 head, 63 sec, 8467200 sectors
> Apr  2 09:31:43 boston /bsd: pciide0: channel 0 interrupting at irq 14
> Apr  2 09:31:43 boston /bsd: wd0(pciide0:0:0): using PIO mode 4, DMA mode 2 (using DMA data transfers)

[blah blah...]

> Apr  2 11:24:07 boston /bsd: pciide0:0:0: Bus-Master DMA error: missing interrupt, status=0x21
                                           ^^^^^^^^^^^^^^^^^^^^^^
this is somehow wrong!


When you boot do this:

boot>-c
[...]
UKC> disable pciide
UKC> quit


After that recompile a kernel WHITHOUT pciide driver.

It'd be nice if you use sendbug(1) to report this incident.

Good luck,

Alejo