These informations in addition: # df | grep custom /dev/sdb2 24034944 2740660 20073344 13% /mnt/custom # mount | tail -3 /dev/sdb2 on /mnt/custom type ext4 (rw) /proc on /mnt/custom/proc type none (rw,bind) /dev on /mnt/custom/dev type none (rw,bind)