5.1-R-p11 unable to "sync disks" when shutting down

[Rahul Siddharthan]

Esa Karkkainen wrote:
> For some reason my home PC is occasionally unable to sync to disk when I
> run "shutdown -p now". 
...
> The only hard disk has four slices. ad0s1 has w2k,

Is the w2k slice mounted?  I find (and others have reported) that the
disks don't sync with a linux ext2 slice mounted (even if it's mounted
read-only) unless I unmount it before shutting down.  Perhaps it's a
related issue.

Rahul