nForce4 IDE channel UDMA woes

[Neil Short]

This is a problem on a home-built computer using an
nVidia nForce4 motherboard.

IDE 1 and 2 each have two devices.

IDE 1 master: a Maxtor hard drive (jumpered to master)
IDE 1 slave: a CDRW (jumpered to slave)
IDE 2 master: CDRW (jumpered to master)
IDE 2 slave: CDRW (jumpered to slave)

So, when I do something intense - like build a new
kernel or buildworld - I start getting the following
in stdout:

<snip>
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006527
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006527
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006655
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006655
g_vfs_done():ad0s1f[WRITE(offset=253247242240,
length=131072)]error = 5
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006527
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006527
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006655
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006655
g_vfs_done():ad0s1f[WRITE(offset=253247242240,
length=131072)]error = 5
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006527
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006655
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006655
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006527
g_vfs_done():ad0s1f[WRITE(offset=253247242240,
length=131072)]error = 5
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006527
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006527
ad0: WARNING - WRITE_DMA48 UDMA ICRC error (retrying
request) LBA=505006655
ad0: FAILURE - WRITE_DMA48 status=51<READY,DSC,ERROR>
error=4<ABORTED> LBA=505006655
g_vfs_done():ad0s1f[WRITE(offset=253247242240,
length=131072)]error = 5
<snip>


Now, interestingly, if I unplug the CDRW that uses IDE
1 slave, everything works fine.

But for my needs, I need three CDRWs.

Questions:

I have noticed a lot of Internet chatter about this
kind of thing happening with similar configurations on
WinXP. Using the generic XP IDE driver seems to fix
it.

Could this be a problem with FreeBSD?

Do you think it would be a dumb idea to try to run
either the hard drive or one of the CDRWs from one of
the available SATAs?



======
Now I, Nebuchadnezzar, praise and extol and honor the King of heaven, for all his works are truth, and his ways are justice; and he is able to bring low those who walk in pride.
Daniel 4:37

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