Mount

The mount.X scripts or symbolic links, where X is the name of a file system, can be used to alter the default mount options for almost any of its supported file systems. Use the -i option to ignore mount.X scripts, 

mount -i -t reiserfs /dev/sdXY /mnt/sdXY

There are two ways to list available altered settings:

Write mount and press a Tab key.

Execute ls /usr/bin/mount.*.

Securely Wipe Disk

# fdisk -l /dev/sdX

# hdparm -i /dev/sdXN

To get disk size in the physical sectors you will need the known disk size in bytes divided with size of a single physical sector: 

# echo $((2000398934016 / 4096))

You can get size of the storage device or partition on it even with the: 

# blockdev --getsize64 /dev/sdXN

# dd if=data_source of=/dev/sdXN bs=${BytesInSector} count=${LogicalSectors}

https://wiki.archlinux.org/index.php/Securely_wipe_disk