Consider the following 5.5pp4 :DISCFREE E output:

           |    Configured     |      In Use       |     Available     |
-----------+-------------------+-------------------+-------------------+

TOTALS :
 Device    |   18412624        |    9237072 ( 50%) |    9175552 ( 50%) |
 Permanent |   17089088 ( 93%) |    8818704 ( 48%) |    7961328 ( 43%) |
 Transient |   17089088 ( 93%) |     418368 (  2%) |    9175552 ( 50%) |

The following cell relationships add up as I expect:

Device Configured == Device In Use    + Device Available
Device In Use     == Permanent In Use + Transient In Use

But what I don't understand is:

Permanent Available != Permanent Configured - Device In Use

I have 17089088 sectors of Permanent Configured.  Of that maximum, 8818704
sectors is already allocated to Permanent In Use, so we subtract the latter
from the former, leaving a new maximum of 8270384.  But we've already allocated
418368 Transient In Use, so we also need to subtract that, yielding what I
think should be 7852016 sectors of Permanent Available.

But DISCFREE shows 7916328 sectors of Permanent Available, which is 109312
sectors *MORE* than my expected result.  Why?

Am I missing something obvious here, or is DISCFREE applying some undocumented
"fudge factor" amounting to those 109312 sectors of difference?
--
Mark Bixby                      E-mail: [log in to unmask]
Coast Community College Dist.   Web: http://www.cccd.edu/~markb/
District Information Services   1370 Adams Ave, Costa Mesa, CA, USA 92626-5429
Technical Support               Voice: +1 714 438-4647
"You can tune a file system, but you can't tune a fish." - tunefs(1M)