3.3 Volume Summary Report


The Volume Summary Report provides information related to the
status of free space on DASD volumes and the status of the
volumes' VTOCs.  The report sequence is device type, then
volume serial.  For each volume you select, a detail line is
produced that contains totals for free space, count of free
extents, number of tracks unaccounted for (missing), number
of alternate tracks in use, and also a fragmentation index.

A sample report follows.


                                                 CA MICS DASD REPORTING SYSTEM
 
                                            VOLUME SUMMARY REPORT FOR SYSID(S) XTRA
 
       REPORT DATE:        MONDAY, JULY 31, yyyy                          REPORT TIME SPAN: 09JULyy:15:16 THRU 10JULyy:15:16
 
+-+---------------+-------------------------------------------------------------------------+-----------------------------------+
|S|    VOLUMES    |                                 SPACE                                   |               VTOC                |
|M+------+--------+--------+--------------+--------------+--------+--------+-------+--------+------+----------+----------+------+
|S|VOLUME| DEVICE |CAPACITY|  TOTAL FREE  | LARGEST FREE |FREE EXT|LOST TRK|  USED |FRAGMENT|TOTAL |   USED   |   FREE   |SPREAD|
|*|SERIAL|  TYPE  |(TRACKS)|   (TRACKS)   |   (TRACKS)   |  COUNT |  COUNT |ALT TRK| INDEX  | DSCB |  DSCBS   |  DSCBS   | INDEX|
+-+------+--------+--------+-(% CAPACITY)-+-(% CAPACITY)-+--------+--------+-------+--------+------+(% TOTAL)-+(% TOTAL)-+------+
 
 C SMS001 3380-K   39825      4118  (10%)     230   (1%)     187         0       0   0.609    3180   324 (10%) 2856 (90%)   1.0
 C SMS002 3380-K   39825     12778  (32%)    3015   (8%)     150         0       0   0.385    3127   286  (9%) 2841 (91%)   1.0
 C SMS003 3380-K   39825      4432  (11%)     316   (1%)     183         0       0   0.555    3127   442 (14%) 2685 (86%)   1.0
 
 
  VOLUMES    3
  _TOTALS_        119475     21328  (18%)    3561   (3%)     520         0       0            9434  1052 (11%) 8382 (89%)


Figure 3-3.  Volume Summary Report
An asterisk (*) in the first report column indicates that the
DIRF bit is set in the VTOC for that volume.  Refer to
Exception 09013 in Chapter 4 for an explanation of this
indication.  Other possible values for this column include a
'C' (meaning the volume has been converted to full SMS
management), or an 'I' (meaning that conversion to SMS
management is in process).

The fragmentation index gives an indication of how fragmented
a volume has become and whether or not it is a candidate for
compaction.  The higher the fragmentation value, the more a
volume needs to be compacted.  Also, for each volume, totals
are produced for number of Data Set Control Blocks (DSCBs) in
the VTOC, number of DSCBs in use, and number of available
DSCBs.

A "spread" index is also produced, giving a numeric
indication of how spread out the used DSCBs are in the VTOC.
Longer search times will result when a VTOC's used DSCBs are
not concentrated at the front of the VTOC.  A line showing
totals is also produced.

Use this report for obtaining a concise look at the state of
DASD volumes and how efficiently they can meet future
allocation demands.