The information on UNUSED BLOCKS of Adabas file components like AC, UI, NI or DS displayed in SYSAOS as well as with ADAREP does not reflect the real situation regarding free blocks.
What is shown instead is the number of blocks never used since the last ADAORD run. Blocks once used, but because of record deletions empty again, are not counted as UNUSED.
For certain files this can make a big difference. Administrators might get mislead and make wrong decisions regarding space management.
Therefore those UNUSED BLOCKS numbers should get determined and displayed correctly with ADAREP and SYSAOS.
Especially in case of DS components a determination making use of the DSST should be a practicable way to achieve this.