While I had my server open to mount the WD (formerly external) drive, I threw in the two 1.5Tb (!) drives I’d brought back from the US … yep, time to start regularly backing up all the machines sitting around the house.
GPartEd refused to create 1.5Tb partitions (kept getting the error “a partition cannot have a length of -1 sectors”).Â Setting the disk label to GPT rather than MSDOS (as suggested here) didn’t do the trick.Â Instead, what worked was a combination of cfdisk and mke2fs.Â In my case (assuming /dev/sde):
sudo cfdisk /dev/sde
sudo mke2fs -j /dev/sde1
Finally, to get the volume ID (for ID-based mounting, which is always best!):
sudo vol_id /dev/sde1
… and add it to the fstab.