About MBR, GPT, ESP, MSR, EFI, UEFI

Basic knowledge of secure boot in MBR, GPT, ESP, MSR, EFI, Uefi, and WIN8:

1.MBR partition table: Master boot record, which is the hard drive master boot Record partition table, supports only hard drives with capacity below 2.1TB. Drives exceeding 2.1TB can only manage 2.1TB, up to 4 primary partitions or three primary partitions and one extended partition, with multiple logical partitions under the extended partition.

2. GPT partition table: GPT, globally unique identity partition table (GUID Partition table), GPT has no limit on the number of partitions compared to the MBR maximum of 4 partition table entries, but Windows Max supports only 128 GPT partitions. GPT managed hard drive size up to 18EB. GPT partition boot boot is supported only on UEFI platform-based motherboards.

MBR and GPT are disk partition schemas, and the following ESP and MSR are partition names, and the GPT partition architecture generates ESP partitions, and computers like the Lenovo series may have partitions that produce lenovo_recovery, which lenovo_ Recovery partition is a pre-installed system of Lenovo Computer recovery partition, it is generally hidden, through disk Management or the corresponding disk tools such as Diskgenius can see it, if the format is not found pre-installed system, only to Lenovo service station.

3. ESP Partition: EFI system partition, which is used in a computer system with an EFI BIOS to start the operating system. The boot manager, drivers, system maintenance tools, etc. are stored in the partition. If your computer uses an EFI system, or if the current disk is used to start the operating system on the EFI platform, you should recommend the ESP partition.

4. MSR Partition: The Microsoft Reserved Partition, which is used to reserve space on a GPT disk for alternate partitions, such as the need to use these partition spaces when converting a disk to a dynamic disk.

5. Secure boot feature: A new security feature has been added to Windows 8, and secure boot is built into the UEFI BIOS to combat malware infected with the MBR, BIOS, Windows 8 defaults to secure boot, during the boot process, Any modules to be loaded must be signed (mandatory), the UEFI firmware will be validated, unsigned, or cannot be verified and will not be loaded.

6.EFI: Extensible Firmware Interface The abbreviation for the English name Extensible Firmware Interface is an upgrade that Intel has introduced to replace the BIOS in a future PC-like computer system.

7.UEFI: The new UEFI, full name "Unified Extensible Firmware Interface" (Unified extensible Firmware Interface), is a standard that describes the type interface in detail. This interface is used by the operating system to automatically load from a pre-boot operating environment onto an operating system. UEFI was developed on the basis of EFI1.10, whose owner is no longer intel, but an international organization called Unified EFI form. The Extensible Firmware Interface (extensible Firmware Interface,efi) is the recommended standard for Intel's architecture, interfaces, and services for PC firmware. Its primary purpose is to provide a set of correctly specified startup services that are consistent across all platforms before the OS is loaded, and are seen as a successor to the BIOS with a history of nearly more than 20 years.

About MBR, GPT, ESP, MSR, EFI, UEFI