dma/sysctl
Rob
spamrefuse at yahoo.com
Sat Mar 5 15:58:28 PST 2005
Luciano Musacchio wrote:
> Hi,
> I've a fbsd machine that hangs once in a while,
> I've this en /var/log/messages:
> ...
> Mar 5 14:44:58 chiba kernel: ad2: WARNING -
> WRITE_DMA UDMA ICRC error (retrying request)
> LBA=2949471
> ...
>
> So, this means my hd is about to crash?
> How can I tell the kernel to reboot on such cases?
> (via sysctl?)
This is 5.3, right? I bet you would not have such
problems with 4.X.
My PC instantly crashed at boot with this same
message. I solved it by adding following to
/boot/loader.conf:
hw.ata.ata_dma="0"
This will force the harddisk to operate in slow
PIO4 mode, but in my case the DMA trouble disappeared.
Rob.
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