What is partition?
To divide memory or mass storage into isolated sections. In DOS systems, you can partition a disk, and each partition will behave like a separate disk drive. Partitioning is particularly useful if you run more than one operating system. For example, you might reserve one partition for Windows and another for UNIX.

In addition, partitioning on DOS and Windows machines can improve disk efficiency. This is because the FAT system used by these operating systems automatically assigns cluster size based on the disk size: the larger the disk, the larger the cluster. Unfortunately, large clusters can result in a wasted disk space, called slack space. There is an entire sector of the software industry devoted to building utilities that let you partition your hard disk, such as Fdisk, Partition Magic and Super Fdisk.

Explanation: The Fdisk commands are typically run to prepare a new hard disk for use - enabling the division of hard drive and the installation of an operating system, application programs & eventual user data. The Fdisk command has been around for a long time, formerly they were stand alone DOS programs before being integrated into Windows.

Where previously the computer would boot and be usable, systems that have been Fdisked often report the following errors: (these errors are frequently displayed on a black screen with white text)

• No boot device
• Operating System not found
• Primary Hard Disk not found. Press F1 to Continue
• Master Boot Record Not Found
• Invalid or corrupt FAT
• Invalid partition table entries
• Invalid sector
• Cannot find file or program
• Invalid command.com
• Primary/Secondary Hard disk failure
• Non system disk
• Disk error

Partition Recovery Steps:  We recommend that you use our professional partition recovery tool - Partition Table Doctor to recover drives after have been Fdisked. If Partition Table Doctor cannot help you, We recommend that you can use professional data recovery software.

Note: Under no circumstances should you run a repair utility such as Scandisk or Chkdsk . It's also very important that nothing else is done to the drive - the best option is to power down and remove the drive from the machine.