Sebastian wrote:
Markus Trippelsdorf wrote:
Are you sure that your hard drive is not dying? Run smartctl -a
/dev/ad0 and see if any errors were being logged.
(smartctl is part of the smartmontools port)
You should also try another cable.
Thanks for the response. I'm reasonably sure, the disk is brand new,
and though it could certainly be bad, I installed Linux on the system
this morning without issue. I've tried two different UDMA cables also,
just to be sure. Under PIO4 mode in BSD (by setting hw.ata.ata_dma=0),
I can install and then write data to my heart's content without any
errors.
I'm currently reinstalling again, because I believe a partition has
become corrupted after panicking with the disk in UDMA6 mode.
Just as a followup: Attempting to run "atacontrol mode ad0 UDMA6"
resulted in WRITE_DMA48 errors and a panic. Afterwards, disk access was
slow, and trying to use _any_ UDMA mode resulted in DMA errors being
logged, and eventually another panic.
Having briefly tested UDMA3-5 with success previously, I felt that the
partitions must have been corrupted somehow, so I reinstalled FreeBSD
from scratch. It's better, after booting with "hw.ata.ata_dma=0" and
then running "atacontrol mode ad0 UDMA5", it's running fine using UDMA5
and copying lots of data around:
# atacontrol mode ad0
current mode = UDMA100
So my question remains: How do I tell FreeBSD to use UDMA5 on this drive
at boot-time?
Thanks.
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