File allocation managers

The TDMF COMMDS must be allocated in contiguous cylinders. If a product that actively manages file allocation (for example, ProSMS or SAMS: Vantage) is installed, be aware that the possibility that the message GTD1080S might be created causing the migration session to end. This message states that the COMMDS space is not contiguous. The COMMDS needs to be reallocated outside of the control of the file allocation manager.