On Tue, 2018-10-16 at 11:05 +0100, Nux! wrote:
The EL7 partitioner is a complete disaster and I regularly bitch about it on twitter and irc. You could try to convince it with kickstart and bypass the GUI altogether.
I agree and also use kickstart but sometimes, for a one-off install, I find it easier to partition first with the CentOS 6 installer and quit after the drives are partitioned. CentOS 7 can then be installed onto the existing partitions.