Chris Moules <firstname.lastname@example.org> writes: > It seems to me that, maybe, libparted, partman or something related in > the d-i does not work with more than 4TB. All 6TB are shown but cannot > be used. As nothing seems to have a 4TB limit I am not sure what it > could be. A year ago there was a limit in parted, at least on 32 bit, see the final notes in #510544. -- Regards, Feri.