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Date: Tue, 7 Dec 2004 20:31:03 -0800 (PST)
From: Crucio <crucio2004-freebsd@yahoo.com>
To: freebsd-stable@freebsd.org
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Subject: trouble installing 5.3 on soekris net4801
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I am unable to install FreeBSD 5.3-RELEASE on my
Soekris net4801, which has a SanDisk Ultra II 512MB
Compact Flash card as a hard drive. The kernel probes
the drive just fine but when it comes time to write or
read from the drive, specifically in sysinstall, I
get;

ad0: TIMEOUT - READ_DMA retrying (2 retries left)
LBA=0
ad0: FAILURE - READ_DMA timed out
ad0: TIMEOUT - READ_DMA retrying (2 retries left)
LBA=0
ad0: FAILURE - READ_DMA timed out
ad0: TIMEOUT - READ_DMA retrying (2 retries left)
LBA=0
ad0: FAILURE - READ_DMA timed out
ad0: TIMEOUT - READ_DMA retrying (2 retries left)
LBA=1
ad0: FAILURE - READ_DMA timed out

Then sysinstall says;

"ERROR: Unable to write data to disk ad0!"

To do this manually, with fdisk, disklabel and newfs
works up until the computer has rebooted and tries to
load the root filesystem. It hangs for a little while
then starts spitting out those READ_DMA errors and
finally refuses to mount ad0s1a as root.

Disabling DMA in loader.conf doesn't seem to have any
effect.

Any ideas here would be much appreciated.