Yes, I have a RAID adapter and all my drives are running in JBOD mode. Since I was removing 4 drives, I was concerned that there would be a chance that a given file might exist only on those drives and not be duplicated elsewhere. I felt the safest was to let Drivepool de-allocate the drive and move any unique data elsewhere. But, I did not think about disabling the balance on all 4 drives... I am sure I moved data multiple times.. sigh. It took a little over 2 hours to get them all out of the pool.