Analysis of the values in a SPACE or SPACEF column

The value in a SPACE or SPACEF column represents total allocated space, not only the space that is allocated on the current list of volumes in the storage groups. If the value is too large to fit in the SPACE column, the SPACEF column is used.

You can delete volumes from a storage group even though space on those volumes is still allocated to Db2 table spaces or indexes. Deletion of a volume from a storage group prevents future allocations; it does not withdraw a current allocation.