UEFI differs from MBR

The difference between EFI and MBR startup

Large hard disk and WIN8 system, let us from the traditional bios+mbr mode upgrade to UEFI+GPT mode , now buy mainstream computer, are pre-installed WIN8 system, in order to better support 2TB hard disk, faster start Win8, Pre-installed systems are formatted with GPT partitioning, and the motherboard BIOS supports UEFI boot .

introduction to MBR and GPT:
MBR and GPT are two different partition forms, like you buy back a new hard disk, to be divided into different areas, systems, tools, music and so on, to see how you divide,the traditional MBR model can only
It is divided into 4 primary partitions and the largest supported 2.1T HDD. GPT can be divided into multiple partitions and supports 9.4ZB hard drives (9.4zb=94 billion TB)。
Ntfs,fat32 is a file system, which makes it easier to fill in the data by playing a grid on the hard drive of the sub-zone. As to what type of grid you decide, now win mainstream is NTFS.
Several common partition interpretations:
1.MBR partition table: Master Boot Record, i.e.hard disk master boot Record partition table, only support hard disk under 2.1TB, more than 2.1TB of hard disk can only manage 2.1TB, up to
only 4 primary partitions or three primary partitions and one extended partition are supported, and there can be 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 supports up to 128 GPT partitions, and GPT managed hard drive sizes up to 18EB。 OnlyUEFI Platform-based motherboards support GPT partition bootMove.
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, driver,
system maintenance tools and so on. 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.
Mainstream partition comparison:
First, MBR partition structure
MBR includes: boot code, Windows disk signature, MBR partition table, and MBR end flag total of 4 parts. 0 Cylinders, 0 heads, 1 sectors on the hard drive
Second, GPT partition structure
Http://yuedu.biz/wp-content/uploads/2014/04/147.jpg
GPT Disk PartitioningThe structure solves the disadvantage that MBR can only divide 4 primary partitions, and supports large hard disk, the partition structure is clear and simple and has backup。

How to install WIN7 on a GPT partition
After understanding the PT partitioning structure, we need to know that to use the GTP format partition system, the required system must be WIN7 X64 bit above, andmotherboard supports UEFI boot mode。
The GPT format partition must have a minimum of three extents.
The first is the EFI System Protected Area (default hide does not load) the second is the MSR Microsoft Reserved Partition, the third one is the system data partition。
Installation process:
1, prepare a new hard drive, boot, insert WIN7 X64-bit installation CD, boot from CD. (What, no CD-ROM, that only make U disk installation disk)
1> mobile Hard disk (USB stick) to prepare a FAT32 partition, be sure to FAT32 partition, because the EFI BIOS can only recognize FAT32 partition, recommended 5g+, minimum requirements, can put down Win7 image decompression
Out of all files. The primary partition is also OK, logical partitioning is OK, and no boot function is required. For the convenience of narration, this partition is called the Install partition.
2> Copy all files in the Win7 x64 mirror to the Install partition root directory
3> Unzip the EFI SHELL (x64). zip to the Install partition root directory,
Ps:efi SHELL (x64). zip already contains the DiskPart tool
4> Copy the Bootmgfw.efi to the install partition root directory
Finally, the install partition directory structure, such as
Http://yuedu.biz/wp-content/uploads/2014/04/147-1.png
2, installation screen selection is now installed, custom installation, to select the partition when (this time see should be a completely no partition of the empty hard disk) this time press SHIFT+F10
。
3. Create a GPT partitioning process (important):
Enter DiskPart, enter.
Enter list disk, you can see the hard disk number, 0,1,2,3 ... or something.
Enter select disk x (x is the hard disk number) to select the hard disk you want to partition.
enter clean to clear all the partitions on the hard disk (if your hard disk is not in the unpartitioned state).
Enter convertGPT converts the hard disk into a GPT partition table(It is basically a permanent conversion and cannot be reversed until you clear the partition table with clean again).
Now start creating the EFI partition:
Enter create partition efi size=xxx (XXX is the partition size, in megabytes, Windows defaults to 128m,mac default 200M)
Enter create partition msr size=xxx (MSR is Microsoft Reserved Partition, Windows defaults to 100M)
Enter create partition primary SIZE=XXX D=YYY creates a data partition that can be used to install the operating system (ID=YYY can not be entered, it represents the GUID partition type (grid
, just like the MBR partition table fat/ntfs/hfs+ with a string representing the partition format, but the GUID is very long, is a global unique identifier, if not input, in the installation operation system
Automatically generated when the partition is formatted).
Then repeat the sentence above to create multiple data partitions.
After you have finished partitioning, you can format the EFI partition to mount it by:
Enter list partition to see how much the EFI partition is numbered.
Enter select partition x to select the EFI partition (typically 1).
Enter assign Letter=x (x for the letter you want to assign to it, just fill in an unoccupied drive letter)
Enter Exit to exit the DiskPart partition tool, which goes back to the command line.
Enter format x:/fs:fat32/q/y The EFI partition.
Such a GPT disk is ready, and the rest is installed.
4, after the partition is good, you can install the operation under the graphical interface.

Appendix: Win8 Installing win7 under GPT partition (can retain the original WIN8 system and one-click Restore)

Postscript:
In addition to using EFI boot to install Windows on the GPT partition table, EFI has a lot to play with. We can write the EFI program ourselves, and we can also download the EFI program on the Internet to run. Only
To put the *.efi in the EFI directory of the FAT32 u disk, the motherboard will be able to execute it. Someone on the Internet has this method to load the EFI program and opens the Sony notebook BIOS hide option to
Support for raid and overclocking and so on, it is very exciting ah.
EFI is an inevitable trend to replace the BIOS as a proven technology (not a new technology) that has been used in server systems. The same MBR as the legacy of the DOS era, will also be eliminated. Efi
+GPT will become the mainstream, it is really good practice oh.

BIOS+MBR has tended to be eliminated, UEFI+GPT is the trend

GPT is a new type of disk mode, more stable than our commonly used MBR disk, more self-correcting ability, the number of primary partitions on a disk is not limited by (4) limit, support the total capacity of more than 2T and more than 2T partition (almost no limit, maximum support to 128 partitions, Partition size support to 256TB).
The XP system does not recognize GPT disks, Win7, WIN8 can read and write, but cannot install the operating system. GPT disks can only be installed (and must be) after using a motherboard that supports FEI. Win8.
A reserved partition (hidden partition) of a GPT disk, also known as a FEI reserved partition, prevents the disk from being attached to an XP system that is mistakenly formatted as an unformatted disk, resulting in data loss. This reserved partition is created automatically when the hard disk is initialized (or converted) to GPT mode, depending on the total capacity of the hard disk.

0. It is clear that UEFI is only part of EFI

Disk partition information Conversion

System Partition Support mode

Reference:

http://wangpai.2345.cn/thread.php?fid=12&pid=2962663

Http://jingyan.baidu.com/article/47a29f243ed51fc0142399bc.html

https://www.douban.com/note/344233951/

UEFI differs from MBR