Listing Information about OS Disks with the LISTDS Command

The QUERY DISK command gives usage information about normal CMS minidisks, but gives minimal information about OS disks. You can use the LISTDS command with the FREE option to obtain information about free space on an OS disk. For example:
listds n (free
Freespace extents for N disk:
  CYL-HEAD    (RELTRK) TO   CYL-HEAD    (RELTRK)     TRACKS
00000 00008          8    00001 00014         29         22
Ready;

The LISTDS command with the PDS option provides information about the libraries residing on an OS disk.

The LISTFILE command gives information about minidisk or SFS files, but not about files on an OS disk. You can use the LISTDS command with the FORMAT option to obtain information about OS disk files. For example:
listds n (format
RECFM LRECL BLKSI DSORG   DATE   LABEL  FM DATA SET NAME
FB    80    27920 PO    12/12/91 MVS292 N  MY.OWN.MACLIB
Ready;

listds n (extent

Extent information for VTOC on N disk:
SEQ TYPE    CYL-HEAD    (RELTRK) TO   CYL-HEAD    (RELTRK)     TRACKS
000 VTOC  00000 00001          1    00000 00002          2          2

Extent information for MY.OWN.MACLIB on N disk:
SEQ TYPE    CYL-HEAD    (RELTRK) TO   CYL-HEAD    (RELTRK)     TRACKS
000 DATA  00000 00003          3    00000 00007          7          5
Ready;