From mboxrd@z Thu Jan  1 00:00:00 1970
Message-Id: <200610171555.k9HFt3728837@zamenhof.cs.utwente.nl>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] kenfs config? (was: OT: scsi sense error code hardware
In-reply-to: Your message of "Tue, 03 Oct 2006 17:19:38 -0400."
	<9dc713f8017f9ffce2797522dcf318df@plan9.bell-labs.com> 
References: <9dc713f8017f9ffce2797522dcf318df@plan9.bell-labs.com> 
From: Axel Belinfante <Axel.Belinfante@cs.utwente.nl>
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Content-ID: <28831.1161100502.1@zamenhof.cs.utwente.nl.cs.utwente.nl>
Date: Tue, 17 Oct 2006 17:55:02 +0200
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> Right, you could just configure the cache as mirrored disks and
> recover main.  The mirror device does not copy new devices when they
> are added to a mirror; you'd need to copydev first (or boot as a cpu
> server and use dd) to copy the original disk to its mirror disks).

finally I had time to look at my fs.
seems I'm lucky: the fake worm is ok.

I've replaced the cache disk and recovered; I encountered
'panic: fworm: rbounds 13219302' (my fs kernel is a bit old (2003))
but the fix mentioned here a while ago (fix conf.firstsb) worked.

since I wanted a backup (and if possible: mirror) 'right now' even
though my /sys/src/fs is out of date and does not yet have copydev,
and I don't want to pull a lot of changes from sources right now,
I tried copyworm
from:  filsys main cw0f(w5w1)
to:    filsys output f(w2)

this seems to have worked, but I have not yet accessed the result
(just switched off the machine while it looped after copyworm).

now my real question is:
would it be ok to use the copy f(w2) as mirror,
as in    filsys main cw0{f(w5w1)f(w2)}    ?

Axel.