It is a process to create a file system in a partition or volume for file storage.
It is often used to organize data storage by subdividing it into as many as 23 logical sections.
It is a section of an extended partition on an MBR. It can be used to separate information for administrative purposes.
It is a section of the disk, that is inaccessible to the user, containing an image that can be used to restore the computer to its original configuration.