External HDD switching drive letters
I'm trying to copy about 1.2 TB of data from my server to an external HDD. It mounts fine and it starts copying, but after an hour or two, the drive "switches" letters. Meaning that the cp command starts returning I/O errors and when I run fdisk -l, I find that the drive letter switches from /dev/sdd1 to /dev/sdf1. I've tried mounting by UUID before, but then when I run df -ah I run into having both /dev/sdd1 and /dev/sdf1 mounted to the same directory and still am unable to complete the cp command. Any thoughts?