More diagnostics trying to dump filesystem

[Clint Olsen]

This is all /really/ helpful:

mksnap_ffs: Cannot create /home/.snap/dump_snapshot: Resource temporarily unavailable
dump: Cannot create /home/.snap/dump_snapshot: No such file or directory

>From /var/log/messages:

fsync: giving up on dirty
0xc524b330: tag devfs, type VCHR
    usecount 1, writecount 0, refcount 642 mountedhere 0xc5063a00
    flags ()
    v_object 0xc1432000 ref 0 pages 2556
     lock type devfs: EXCL (count 1) by thread 0xc5e58600 (pid 5531)
        dev ad0s1d

-Clint

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