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From: gopher@extro.ucc.su.oz.au (John McQueen)
Newsgroups: comp.sys.mips
Subject: !pg_ismod() PANIC (was Re: Dump program causes system crash)
Message-ID: <1990Jan19.005159.1560@metro.ucc.su.oz.au>
Date: 19 Jan 90 00:51:59 GMT
References: <1990Jan16.220024.2485@alberta.uucp>
Reply-To: gopher@extro.ucc.su.oz.au (John McQueen)
Organization: University Computing Service, Uni. of Sydney, Australia.
Lines: 40

In article <1990Jan16.220024.2485@alberta.uucp> gordon@cs.UAlberta.CA (Gordon Atwood) writes:
>
> [ description etc deleted ]
>
>The only other clue that I can provide is the error message which appears
>on the console just prior to the crash.  The messages was
>     "assertion failed !pg_ismod(pd), file:  fault.c line 284"
>
Not the old !pg_ismod() problem 

We have had a similar problem here at Sydney University.
We have Mips 120 Running Risc/OS 4.01 (with X25 and slip).
The Machine is major networking node so we like to have it
up all the time - hence we use (or rather used to use) cpio
to do our backups.  When we took a full backup,
which usually conisted of 3 or 4 tapes
the machine would crash with a !pg_ismod() problem 

---------
PANIC: assertion failed !pg_ismod(pt) file getpages.c, line 622
syncing disks ... (etc)
-------

We now use dump to do backups and just have to put up with the downtime.
We've had lots of problems with the tape drive. It seems to randomly
give ioctl errors when you rewind the tape (although the tape is rewound).

We've reported the problem to our local vendors so hopefully
it's found it's way back to mips by now.

	John McQueen
________________________________________________________________________
John Scott McQueen			    |   gopher@extro.ucc.su.oz.au
University Computing Service, H08	    |   Phone:     +61 2 6923495
University of Sydney, NSW 2006, Australia   |   FAX:       +61 2 6606557
--
________________________________________________________________________
John Scott McQueen			    |   gopher@extro.ucc.su.oz.au
University Computing Service, H08	    |   Phone:     +61 2 6923495
University of Sydney, NSW 2006, Australia   |   FAX:       +61 2 6606557