On Thu, 3 Apr 2014, David Wolfskill wrote:

And on my laptop, I had no problems (using AHCI).  The build machine,
though, starts OK, then comes to an inglorious end:

Trying to mount root from ufs:/dev/aacd0s4a [rw]...
mountroot: waiting for device /dev/aacd0s4a ...
Mounting from ufs:/dev/aacd0s4a failed with error 19.



So... I have serial console access; is there any debugging I might
do to help figure out what's wrong?  Or is what's wrong already

I have been able to reboot from this point to one of the other
slices; I could probably also unload the default kernel & load
yesterday's (err... make that "the day before's" -- yesterday's
didn't build -- @r263983).

I'm also having some trouble booting (into single user mode, so as to run the installworld), at r264039. It seems that ciss never attaches, so my da0 (which is supposed to be on ciss0) does not appear. My kernel.old is much older, __FreeBSD_version 1100005, but does boot. However, attempting to boot kernel.old in either single-user mode or verbse mode also drops me to mountroot> . That would seem to indicate some hardware problem or timing issues more than a problem with the code itself, so I had been holding off on posting until I could get more information.

Unfortunately, my serial console is not working at the moment, so getting more information is a bit challenging. Diffing the dmesg from the good and bad boots would probably be helpful for you to do.

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