Data Set Extents (option 5.6)

Use this option to display the begin and end of the extents of a data set.

The display panel shows absolute disk extents and disk extents relative to the beginning of the data set. You can use this information for all disk functions which prompt you for the location of a disk extent.

For multivolume data sets only the extents on the selected volume are shown.

Figure 1 shows an example of DSX output.
Figure 1. Data set extents display
  Process   Options   Help
────────────────────────────────────────────────────────────────────────────────
 Z Data Tools                   Data Set Extents

Input:
┌──────────────────────────── Z Data Tools Messages ──────────────────────────┐
│                                                                             │
│ VOLSER: MVS4W4  Data Set Name: HFMUSER.FMOS390.QSAM                         │
│                                                                             │
│ Absolute and relative extent limits within data set:                        │
│                                                                             │
│                 Begin - ABSOLUTE - End          Begin - RELATIVE - End      │
│ Ext  Tracks  Cyl-hd Rnnnnn   Cyl-hd Rnnnnn   Cyl-hd Rnnnnn   Cyl-hd Rnnnnn  │
│   0      1    69  0   1035    69  0   1035     0  0      0     0  0      0  │
│   1      1    69  1   1036    69  1   1036     0  1      1     0  1      1  │
│   2      1    69  2   1037    69  2   1037     0  2      2     0  2      2  │
│   3      1    69 13   1048    69 13   1048     0  3      3     0  3      3  │
│   4      1    70  4   1054    70  4   1054     0  4      4     0  4      4  │
┌───────────────────────────────────────────────────────────┐                 │
│ Press the CANCEL or EXIT key to remove the message Pop-Up │              6  │
└───────────────────────────────────────────────────────────┘                 │
│ Command ===> ───────────────────────────────────────────────── Scroll PAGE_ ┘
│  F1=Help        F2=Split       F3=Exit        F4=CRetriev    F7=Backward    │
│  F8=Forward     F9=Swap       F10=Actions    F12=Cancel                     │
└─────────────────────────────────────────────────────────────────────────────┘
 Command ===> _____________________________________________________
  F1=Help      F2=Split     F3=Exit      F4=CRetriev  F7=Backward  F8=Forward
  F9=Swap     F10=Actions  F12=Cancel