Partition Table: Difference between revisions

The information about primary partitions and an extended partition is contained in the Partition Table, a 64-byte data structure located in the first sector (cylinder 0, head 0, sector 1) of the hard drive. The Partition Table conforms to a standard layout that is independent of the operating system. Each Partition Table entry is 16 bytes long, making a maximum of four entries available. Each entry starts at a predetermined offset from the beginning of the sector, as follows:

Each entry has the following structure:

Element  Size    Description

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  8        dword  Relative Sector (to start of partition)

12        dword  Total Sectors in partition