I think the mountlist was what we used before OS 2.1, when the mountfiles were introduced as an alternative.
The quote mentions the provided mountfiles C0 etc.
Mountfiles C0 (unit 0), C1 (unit 1) and C2 (unit 2) are provided. These are for WB2.1+,
This would also be what I'd expect to work under 3.1.4 (although I don't have it). Are they actually provided? If so, they (or one of them, probably C0) should be copied to SYS:Devs/DOSDrivers, the contents of which should automaticaly be mounted (activated) at boot time.
Best regards,
Niels