Option "U" displays a table of unused storage within the database:
16:30:53 ***** A D A B A S BASIC SERVICES ***** 2006-07-20
DBID 105 - Display Unused Storage - PDRU002
I Device I Total Number of I Extent in Blk. I
I Type I Blocks / Cyls. I from - until I
------I--------I------------------------I----------------------------I
DATA I 8391 I 10862 144 I 130509 - 141370 I
------I--------I------------------------I----------------------------I
ASSO I 8391 I 8406 46 I 36583 - 44988 I |
Separately for the Associator and Data Storage extents, the table shows the device type where the unused blocks are located, the number of unused storage blocks and cylinders, and the range of unused block numbers.
The equivalent direct command is
DISPLAY UNUSED
