Also, perhaps reinstall the HD driver. If you open Utilities/Terminal.app and type
Code:
$ kextstat|grep Digi
137 0 0xffffff7f840c3000 0x8c000 0x8c000 com.digidesign.iokit.DigiDal (20.3.0f4) 6BA77AD7-699C-320C-BD49-96531A6A627C <13 6 5 3 1>
what do you see?