Below are various commands for discovering. mounting and un-mounting drives.

Command:
fdisk -l
will give you the hd* (* = number) of the Hard Drive you want to format

To format the drive. as ROOT
enter this command
mkfs /dev/hd*

Line for the /etc/fstab file:
/dev/sda1 /mnt/sdb1 auto noauto.user.owner 0 0

Mount the drive:
mount -t auto /dev/sdb1 /mnt/dev_backups