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An HDD may contain only one extended partition, but that extended partition can be subdivided into multiple logical partitions. DOS/Windows systems may then assign a unique drive letter to each logical partition. GUID partition table (GPT) only has the primary partition, doesn't have the extended partition and the logical partition.
It has several advantages over master boot record (MBR) partition tables, such as support for more than four primary partitions and 64-bit rather than 32-bit logical block addresses (LBA) for blocks on a storage device. The larger LBA size supports larger disks.
Changes to a running partition can be made dynamically up to the maximum value set, and down to the minimum value set in the active profile. The changing of resource allocations without restart of the logical partition is called dynamic logical partitioning. IBM PowerVM is the licensed/purchased feature that enables the virtualization features ...
Unlike primary partitions, which are all described by a single partition table within the MBR, and thus limited in number, each EBR precedes the logical partition it describes. [note 2] If another logical partition follows, then the first EBR will contain an entry pointing to the next EBR; thus, multiple EBRs form a linked list.
A partition is a division of a logical database or its constituent elements into distinct independent parts. Database partitioning refers to intentionally breaking a large database into smaller ones for scalability purposes, distinct from network partitions which are a type of network fault between nodes. [1]
The partition type (or partition ID) in a partition's entry in the partition table inside a master boot record (MBR) is a byte value intended to specify the file system the partition contains or to flag special access methods used to access these partitions (e.g. special CHS mappings, LBA access, logical mapped geometries, special driver access, hidden partitions, secured or encrypted file ...
Logical Volume Manager: Yes Yes [b] Yes Yes No Yes [c] Refers to PEs as PPs (physical partitions), and to LEs as LPs (logical partitions). Does not have a copy-on-write snapshot mechanism; creates snapshots by freezing one volume of a mirror pair. Hewlett-Packard: HP-UX 9.0 HP Logical Volume Manager Yes Yes Yes Yes No Yes FreeBSD Foundation ...
Various programs are able to create a "backup" of both the primary partition table and the logical partitions in the extended partition. Linux sfdisk (on a SystemRescueCD) is able to save a backup of the primary and extended partition table. It creates a file that can be read in a text editor, or this file can be used by sfdisk to restore the ...