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Date: Mon, 7 Apr 1997 11:11:35 -0700 (PDT)
From: Doug White <dwhite@gdi.uoregon.edu>
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Reply-To: Doug White <dwhite@resnet.uoregon.edu>
To: Kris Kennaway <kkenn@bns.com.au>
cc: FreeBSD Questions <questions@freebsd.org>
Subject: Re: Corrupted swapspace
In-Reply-To: <199704060322.MAA22496@topdown.bns.com.au>
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On Sun, 6 Apr 1997, Kris Kennaway wrote:

> I've just been playing around with my hard disk partitions (resized the 
> primary DOS partition on my first hard drive using partition magic and 
> changed the cluster size), which is the only thing I can think of that 
> was actually changed in the meantime. I added another FreeBSD partition 
> on a second drive and moved around some directories, but I can't think 
> how that could have caused the problem below:

What error message are you getting that leads you to believe the swapspace
is corrupted?  All that's there is scratch space that's probably wiped or
ignored on every boot.

> # /dev/wd0s2a:

[proper disklabel]
> 
> [morden] 11:57 ~ disklabel -r /dev/wd0s2b
> Bad pack magic number (label is damaged, or pack is unlabeled)

My 2.2-970215-GAMMA system does this too:

gdi,ttyp1,~,19>disklabel -r /dev/wd0b
Bad pack magic number (label is damaged, or pack is unlabeled)

> By contrast, disklabel -r on my other swap partition on the second hard 
> drive correctly gives me the disklabel summary for the drive.

That just happens to work then.  

> By rights, I should have 88M total swap with these two partitions, but 
> top was reporting it as 133M total. Presumably as a consequence, my 
> processes kept on dying with signal 10 and 11 (I'm assuming this is what 
> hapened when they tried to enter the phantom swap-space). I've removed 
> the first swapon entry from fstab and it seems to be working fine so far.

What does `swapinfo' report with both swap partitions on?

> My questions are these:
> 
> a) How did this happen?

It should work OK.  Your disk may have uncovered a media defect inside the
swap partition.  

> b) What can I do to fix it?

Working on that.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major