EFI System partition

EFI System partition

The EFI System partition is a partition on a data storage device that is used by machines that adhere to the Extensible Firmware Interface. It contains the boot loader programs for all operating systems installed (in other partitions) on the device, device driver files (used by the firmware at boot time) for other devices, and system utility programs that are intended to be run before an operating system is booted [EFI specification, version 0.99] .

The EFI System Partition is formatted using a variant of the FAT format. The Globally Unique Identifier for the EFI System Partition in the GUID Partition Table scheme is C12A7328-F81F-11D2-BA4B-00A0C93EC93B. Its ID in the MBR Partition Table scheme is 0xEE. Whether a disk contains an EFI System Partition is unrelated to the partition table scheme (GUID or MBR) that it uses.

Microsoft recommends that when partitioning a disk, the EFI System Partition be the first partition on the disk. [cite web|url=http://www.microsoft.com/whdc/device/storage/GPT_FAQ.mspx|work=Windows and GPT FAQ|title=EFI System Partition] This is not a requirement of the EFI specification itself. On Windows XP and later, access to the EFI System Partition is obtained by running the mountvol /s command.

On Apple's Intel-based Macintosh computers, the EFI partition can be deleted without ill effect. The system will still boot, and the boot manager will still allow users to choose whether to start a Boot Camp partition or the default Mac OS X. This could indicate that Apple does not yet take advantage of all the possible uses of the 200MB EFI partition on Intel-based Macs.

See also

*System partition and boot partition


External links

* — a registry of the subdirectories that lie below the /EFI directory on an EFI System Partition

Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • System partition and boot partition — In Microsoft Windows, the system partition and boot partition refer to:*The system partition is a disk partition that contains the boot sector and files such as NTLDR that are needed for booting Windows XP and earlier. (Windows Vista and Windows… …   Wikipedia

  • GUID Partition Table — In computer hardware, GUID Partition Table (GPT) is a standard for the layout of the partition table on a physical hard disk. It is a part of the Extensible Firmware Interface (EFI) standard proposed by Intel as a replacement for the PC BIOS, one …   Wikipedia

  • GUID Partition Table — (GPT), zu deutsch GUID Partitionstabelle, ist ein Standard für das Format von Partitionstabellen auf Festplatten oder anderen Datenträgern. Die Spezifikation ist Teil des UEFI Standards, der das BIOS in PCs ersetzen soll. GPT ist dabei der… …   Deutsch Wikipedia

  • Microsoft Reserved Partition — The Microsoft Reserved Partition, or MSR, is a partition on a data storage device that is labelled with Globally Unique Identifier (GUID) equal to E3C9E316 0B5C 4DB8 817D F92DF00215AE. The containing storage device has to use the new GUID… …   Wikipedia

  • BIOS Boot Partition (GPT) — The BIOS Boot Partition is a partition on a data storage device that may be used by standard BIOS based machines in order to boot when the partition table of the device is a GPT label.The Globally Unique Identifier for the BIOS Boot Partition in… …   Wikipedia

  • Basic data partition — In Microsoft operating systems, when using basic disk partitioned with GUID Partition Table (GPT) layout, a basic data partition (BDP) is any partition identified with Globally Unique Identifier (GUID) of EBD0A0A2 B9E5 4433 87C0 68B6B72699C7.cite …   Wikipedia

  • Partition de disque dur — Pour les articles homonymes, voir Partition. Exemple de partitionnement d un disque dur mixte Linux/Windows, avec des liens entre les partitions. En micro informatique, une pa …   Wikipédia en Français

  • Partition (Festplatte) — Dieser Artikel behandelt Partitionen von Datenträgern mit Master Boot Record. Das Extensible Firmware Interface verwendet beispielsweise auch GPT basierte Partitionen. Unter einer Partition (lat. Partitio = „(Ein)teilung“) versteht man einen… …   Deutsch Wikipedia

  • Partition (Informatik) — Unter einer Partition (lat. Partitio = „(Ein)teilung“) versteht man einen zusammenhängenden Teil des Speicherplatzes eines geeigneten physischen oder logischen Datenträgers. Partitionen sind voneinander unabhängig und können von Betriebssystemen… …   Deutsch Wikipedia

  • GUID Partition Table — Dans le domaine du matériel informatique, une table de partitionnement GUID, en anglais GUID Partition Table (GPT) est un standard pour décrire la table de partitionnement d un disque dur. Bien qu il fasse partie du standard EFI Extensible… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”