9.1 RELENG_9 Unable to cleanly dismount root partition on shutdown

Matt Smith matt at xtaz.co.uk
Mon Aug 27 14:09:02 UTC 2012

On 2012-08-27 14:56, Warren Block wrote:
> Stefan called it.  The newfs is done on /dev/gpt/gptroot, no problem
> there.  But when glabel writes to /dev/ada0p2--which is
> /dev/gpt/gptroot, same thing, it overwrites the last block.  And then
> the filesystem is mounted with the glabel device, which is actually
> one block smaller than the filesystem expects.
> Could be either the filesystem or GEOM that's causing the failure at 
> shutdown.
> Happily, those glabels aren't accomplishing anything useful and can
> be skipped.  Removing the glabels and changing the devices in fstab
> might be enough.  A more cautious approach would be to back up, 
> newfs,
> skip the glabel step, and then change the devices in fstab.

As I said on a previous mail I did boot it with a USB stick and cleared 
the glabel metadata and altered the fstab to point to both the GPT 
labels and the raw UFS device and I still get the issue. So am I right 
in thinking then that this has caused irreparable damage and the only 
way I can fix this now is to newfs the filesystem again, this time just 
using GPT labels and not using glabel at all?

This is the first time I've ever done a manually partitioned 
installation with GPT and alignment, previously I've only ever used 
sysinstall with non-aligned MBR installations, so it was a bit of a 
learning curve. If I do have to newfs it again then I want to be sure 
that I'm doing the correct things so that I don't find myself with any 
other issues. So does the rest of what I did look fine?

If it is clearly my own fault then the PR can obviously be closed and 
chalked up to learning!

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