Perfect. Running fsck and rebooting fixed the problem.
Note, lsscsi is not installed. I verified the disk was recognized with fdisk -l.
I am a bit surprised fsck worked. I manually mounted the drive without any difficulties. I would have thought the mount command would have failed if fsck was needed.
I am still curious as to how the disk is mounted. I figured out it is being mounted by systemd, but I could not find the unit file. I would love to understand the setup. A pointer to where it is configured should be sufficient. Thanks!