Subject: Re: Failure to crash-dump: help?
To: NetBSD Current Users <current-users@NetBSD.org>
From: Chris Ross <email@example.com>
Date: 09/20/2007 19:14:08
On Sep 20, 2007, at 18:53, Chris Ross wrote:
> Hello all. I have a sparc64 machine, currently running 4.0_RC1.
> My root, and everything else for that matter, are on a single
> RAIDframe device. However, I want to be able to get/retrieve crash
> dumps, so I've configured my kernel to crash-dump to sd0b, one of
> the components of the raid0 device, and calculated to be "the swap
> part" of raid0.
> The problem I'm seeing is that dumps just aren't working, and I
> don't know why. I'm seeing:
> dump to dev 7,1 not possible
> So, what does "dump to dev 7,1 not possible" actually mean?
> While the machine is up, I can confirm that 7,1 is /dev/sd0b, and I
> can read and write that device just fine. Anyone know of any
> better way to get information out of the kernel crash-dump code on
> *why* it thinks that's not possible?
Okay. Ignore this. I figured out the answer. Looking at the
code tells me that this is because the device I had it pointed at is
smaller than it would need to be to hold a crash dump. I think
perhaps the message the kernel prints could be a bit more
informative, but. :-)
Thanks. This problem is solved.