extended partition

This shows an extended partition with 6,000 sectors and 3 logical partitions.

Extended partitions always start on cylinder boundaries as well.

Some of these codes (such as and ) may be used to indicate the presence of an extended partition.

Basic storage involves dividing a disk into primary and extended partitions.

Another example occurs in the Intel world with the "Extended Partition".

The value for the extended partition is copied to a file and deleted from the partition table.

The sixth partition would then correspond to the second logical drive, or in other words, the extended partition containers are not counted.

This can happen if the extended partition is first edited by Windows Vista or Windows 7.

XP Disk Management may delete these extended partitions without warning.

The first (and sometimes only) EBR will always be located on the very first sector of the extended partition.

If Linux is installed into a logical partition within the extended partition, it is unaffected by changes in the primary partitions.

Only the outermost extended partition defined in the MBR (one of . )

(However, to create an extended partition any partition editor must put extended boot records before each logical drive on the disk.)

DR DOS 6.0 and higher support secured extended partitions using , which are invisible to other operating systems.

This makes it impossible to add a partition when the partition table has approximately 3 primary partitions, plus an "extended partition" with 28 logical drives.

Windows XP Disk Management is known to delete "nonstandard" extended partitions.

The partition type of an extended partition is ( addressing) or (LBA addressing).

In April 1987, PC DOS/ 3.30 added support for extended partitions, which could hold up to 23 "logical drives" or volumes.

A hard disk may contain only one extended partition; the extended partition can be subdivided into multiple logical partitions.

Moreover, even adding a new hard drive having only logical drives in an extended partition would still disrupt the letters of RAM disks and optical drives.

One advantage of cfdisk (over fdisk for example) is that it's possible to enlarge an Extended Partition when there's free space after the partition.

Allows sector-precise editing of primary partitions, logical drives, and EBR extended partitions (type 05).

Similar, Linux supports the concept of a second extended partition chain with type - this type is hidden (unknown) for other operating systems supporting only one chain.

In order to install Windows XP it may be necessary to delete the extended partition from the partition table (in the master boot record).

Ranish Partition Manager can be used to create a (manual) backup of both the primary partition table and the "extended partition" (table).