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For the first time with a DS unit, Synology has disabled basic functionality for non-Synology brand drives, effectively vendor locking these units to their own drives. The following text was sent from Synology sales support, and has been confirmed now by users who have this new model in-hand: Yes, the functionality is different from the way older models work. Unverified hard drives can be used but will display a warning while they are in the NAS. Both unverified and incompatible drives will not be able to display bad sector count, temperature, serial number, and other SMART fields. 1. Drives listed on the incompatible list for a NAS will not be able to be used in that NAS in any way unless migrated from another Synology NAS. 2. If a drive is not listed in either the compatible or incompatible section then it is considered unverified. These drives can be used but will display a warning while they are in the NAS. 3. Both unverified and incompatible drives will not be able to display bad sector count, temperature, serial number, and other SMART fields.