Quick reply: Backfill is enabled in Maui by specifying the BACKFILLPOLICY parameter. By default, backfill is enabled in Maui using the FIRSTFIT algorithm. However, this parameter can also be set to BESTFIT, GREEDY, or NONE (disabled). So yes, it's enabled by default and desired behaviour. Sorry for spamming you. RTM (all) first, yep. Cheers, Arnau