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Date:      Sat, 03 Oct 1998 13:11:35 -0400
From:      Dan Swartzendruber <dswartz@druber.com>
To:        "Kenneth D. Merry" <ken@plutotech.com>
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: dumping with CAM kernel?
Message-ID:  <3.0.5.32.19981003131135.0094fab0@mail.kersur.net>
In-Reply-To: <199810031656.KAA13245@panzer.plutotech.com>
References:  <3.0.5.32.19981003103509.0094e6f0@mail.kersur.net>

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At 10:56 AM 10/3/98 -0600, Kenneth D. Merry wrote:
>Dan Swartzendruber wrote...
>
>Dumps were broken for a while in CAM because (I think) of the order some
>of the shutdown hooks were called.  Basically, the shutdown hook that
>Justin uses to reset the Adaptec board to a "known" state was getting
>called before the dump routine in the da driver gets called.  So when we
>tried to run the dump routine, everything just blew up.  (no sequencer
>running on the card, all the registers are set wrong, etc. etc.)
>
>Justin finally figured out and fixed the problem around the time we put
>CAM into -current.  We haven't released another -stable snapshot yet.
>That'll probably happen after 3.0 goes out.

Thanks, I finally got a dump on a non-CAM system here at home, but it's
nice to know I wasn't hallucinating.

>I'm not sure what kind of environment you've got it in, but if you can, you
>might want to put a serial console on it and enable DDB.  Then you can
capture
>a stack trace of the problem at least.  If that's not possible, I guess
>you'll probably have to wait until we get another -stable snapshot out.

Actually, I'm in the process of setting of a remote monitoring system
for a bunch of the servers.  Each one will have serial0 connected to a
terminal server port.  Each server's /boot.config will say '-P' to probe
for the (nonexistent) keyboard.  I'm finishing up (RSN) the daemon that
runs on a workstation and monitors all of the console ports.  The idea is
to let an admin telnet to a specific port on the workstation and pull up
a console session for that server (complete with the last N lines of console
output, etc...)



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