V — display VTOC information

Option V is used to display VTOC (volume table of contents) information. To use option V:

In the Volume field, specify the volume serial for which you want ISPF to display information.
Note: VTOC information is formatted the same, whether displayed or printed. Therefore, values entered in the Initial Display View field have no effect when you use option V.
Press Enter to display the VTOC information.
Note: The Dsname Level field is not applicable for the V or PV command. Only the Volume field is relevant.

Figure 1 shows an example of a VTOC display.

Figure 1. VTOC summary information panel (ISRUDSLV)

   Menu  RefList  RefMode  Utilities  Help
┌────────────────────────── VTOC Summary Information ──────────────────────────┐
│ Volume . : MVS8WF                                                            │
│                                                                              │
│ Unit . . : 3390                                                              │
│                                                                              │
│  Volume Data             VTOC Data              Free Space  Tracks   Cyls    │
│  Tracks . :   50,085     Tracks  . :      59    Size  . . :   1,146       1  │
│  %Used  . :       97     %Used . . :      60    Largest . :      22       0  │
│  Trks/Cyls:       15     Free DSCBS:   1,187                                 │
│                                                 Free Extents . :     323     │
│                                                                              │
│ Command ===>                                                                 │
│  F1=Help    F2=Split   F3=Exit    F9=Swap   F12=Cancel                       │
└───────────────────────────────────────────────────────────────────────────────┘
       3. Attrib                 /  Include Additional Qualifiers
       4. Total                  /  Display Catalog Name
                                 /  Display Total Tracks
 When the data set list is displayed, enter either:
   "/" on the data set list command field for the command prompt pop-up,
   an ISPF line command, the name of a TSO command, CLIST, or REXX exec, or
      "=" to execute the previous command.
 Option ===> V
  F1=Help      F2=Split     F3=Exit      F7=Backward  F8=Forward   F9=Swap
 F10=Left   F11=Right  F12=Cancel

Track values do not include the remaining alternate tracks for the volume. The free space track values are the number of tracks for the free cylinders plus any additional free tracks.

The fields shown on the VTOC Summary Information panel are:

Unit

Shows the type of DASD device the volume is on, such as 3380 or 3390.

Volume Data

Describes general information about the volume:

Tracks: Total tracks on the volume.
%Used: Percentage of total tracks or pages not available for allocation.
Trks/Cyls: Number of tracks per cylinder for this volume.

VTOC Data

Describes general information about the VTOC on the volume:

Tracks: Total tracks allocated to the VTOC.
%Used: Percentage of allocated tracks or pages used by data set control blocks (DSCBs).
Free DSCBS: Number of unused DSCBs.

Free Space

Describes the free space available for data set allocation on the volume under the headings Tracks and Cyls, showing:

Size: Total number of free tracks and cylinders.
Largest: The largest number of contiguous free tracks and cylinders.

Free Extents

The number of free areas with free cylinders.