[Soekris] Nanobsd/FreeBSD 6.3-R won't boot

[Jed Clear]

After updating my build machine to FreeBSD 6.3R, I created a new NanoBSD
image for my net5501.  I used the same nano and kernel config files as
with 6.2R.  6.3R on the net5501 consistently fails the boot process while
trying to mount / off of the CF card (see console below). After that I
can't even get it to reboot off the old 6.2R partition, unless I pull the
power.

First off, has anyone else gotten 6.3R to boot on a net5501?

I'm planning on trying a GENERIC kernel next, but am wondering if 6.3R is
doing something different with DMA by default, perhaps needing the 1.32h
and i comBIOS fixes.  I think I have 1.32(release), at least it doesn't
display any suffix letter when it boots:  "comBIOS ver. 1.32 20070606
Copyright (C) 2000-2007 Soekris Engineering."

Any other suggestions?

Thanks,

-Jed

Console output follows:
---------------------------------------------------------------------------
Timecounter "TSC" frequency 499904773 Hz quality 800
Timecounters tick every 1.000 msec
IPv6 packet filtering initialized, logging limited to 1 packets/entry
ipfw2 (+ipv6) initialized, divert enabled, rule-based forwarding disabled,
default to deny, logging limited to 5 packets/entry by default
ad0: 977MB <SanDisk SDCFB-1024 HDX 4.03> at ata0-master WDMA2
ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=0
ad0: TIMEOUT - READ_DMA retrying (0 retries left) LBA=0
ad0: FAILURE - READ_DMA timed out LBA=0
ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=0
ad0: TIMEOUT - READ_DMA retrying (0 retries left) LBA=0
ad0: FAILURE - READ_DMA timed out stray irq7
LBA=0
ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=1
ad0: TIMEOUT - READ_DMA retrying (0 retries left) LBA=1
ad0: FAILURE - READ_DMA timed out LBA=1
ad0: TIMEOUT - READ_DMA retrying (1 restray irq7
try left) LBA=0
ad0: TIMEOUT - READ_DMA retrying (0 retries left) LBA=0
ad0: FAILURE - READ_DMA timed out LBA=0
Trying to mount root from ufs:/dev/ad0s1a

Manual root filesystem specification:
  <fstype>:<device>  Mount <device> using filesystem <fstype>
                       eg. ufs:da0s1a
  ?                  List valid disk boot devices
  <empty line>       Abort manual input

mountroot>