disk full message in SYSLOG

[rbriber at POLY1.NIST.GOV]

Here's what should be a simple question.  SYSLOG contains the following
error about once a day:

Apr  8 18:03:02 poly2 grcond[7495]: CIO: t of space
Apr  8 18:03:02 poly2 grcond[7495]: CIO: dks0d1s6: Out of space
Apr  8 18:03:02 poly2 last message repeated 16 times

yet df reports that none of the file systems are particularly full:

Filesystem                 Type  blocks     use   avail %use  Mounted on
/dev/root                   efs   30672   20948    9724  68%  /
/dev/usr                    efs 1886115  803203 1082912  43%  /usr
/debug                      dbg  111912   11464  100448  10%  /debug
+ some nfs mounted stuff which should not be important.

Is there away to tell which disk (i.e. which filesystem) belongs to 
dks0d1s6?  (i.e. root or usr? or does this make sense?)

Why does it say it's full?  The users haven't noticed any particular problems 
recently that would make me think "uh-oh full disk"....

This is on a 4D25 with a 1Gb drive running 3.3.1.



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