On Thursday 11 October 2018, "mark" m.roth@5-cent.us wrote:
I had CentOS 6 installed on an MBR hard disk. I converted the disk to GPT (with UEFI) and installed CentOS 7 on a new partition.
Um, say *what*?! This wasn't a complete rebuild? Next you'll tell us you buy hardware from Acme, the company that Wile E. Coyote buys hardware.
I didn't use hardware from Acme. I used sgdisk.