By running the following command, I get the result:
sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL NAME FSTYPE SIZE MOUNTPOINT LABEL sda 1.8T ├─sda1 1004.5K ├─sda2 linux_raid_member 19.5G │ └─md2 ext4 19.5G / ├─sda3 linux_raid_member 1.8T │ └─md3 ext4 1.8T /home └─sda4 swap 511M [SWAP] swap-sda4 sdb 1.8T ├─sdb1 1004.5K ├─sdb2 linux_raid_member 19.5G │ └─md2 ext4 19.5G / ├─sdb3 linux_raid_member 1.8T │ └─md3 ext4 1.8T /home └─sdb4 swap 511M [SWAP] swap-sdb4
Two times 2TB hard drives. This is a RAID setup, though I am not sure what that means.
For some reason the sdb drives doesn't seem to have ever been mounted, or if it has been I don't know how to access it. I don't understand why the mount points are the same?
How can I mount the second drive, sdb?
sudo mount /dev/sdb3 /media/data
it says: mount: /dev/sdb3 already mounted