Post this time I explain the difference between LEGACY mode and UEFI mode in BIOS, in a computer or similar device there must be a name Firmware, which is a software that bridges between the operating system and hardware, in various brands of motherboards there are various ways to enter the bios when booting, such as pressing the F2/del keyboard key, after entering there are several settings and information such as time and date, type of hardware, voltage, etc,
UEFI (EFI v2.x) is a new technology standard that serves to expand (enhance) the functions of the BIOS program. The birth of the UEFI interface standard now, beginning with the inception of the EFI standard in the mid-1990s, on a joint project of Intel-HP Itanium server computers.
If Intel and HP as the pioneers of the birth of EFI then in the next development further refined the specifications and features”so that it can be applied in all modern computer hardware platforms today.
As a result, a new interface specification called UEFI was born. U= Unified which means standardized. UEFI is a development of EFI (v1.x). UEFi is also known as EFI v2.x.
UEFI is a software component found in more modern computer systems. Although the early-2nya only used on Server-class computers, but the current trend sdh began to be widely used on the machine” high-End PC computer (High End) and also on laptops.
After the advent of UEFI firmware, the usual BIOS technology (previous generations) was called Legacy BIOS. * ) legacy can be interpreted : old technology standards. Please note that BIOS technology is 30 years old, so it's time for a new generation of technology that is more sophisticated and can support developments in hardware and technology.
If compared with legacy BIOS, UEFI has many advantages in terms of features, programming language level, sophistication and completeness of Computer hardware Control features, visual appearance, memory capacity and bit code.
In legacy BIOS, he used 16 bit-code, whereas the current computer processor technology sdh using 64 bits, of course, there will be a gap that far. This is just the simplest example of the limitations (lagging) BIOS to be able to support the rapid development of computer hardware technology.
Because the BIOS was invented as early as 30 years ago by IBM, which was then used for the product” IBM PC. If old-school technology firmware (obsolete technology) must be forced to support new technology that continues to develop, the consequences will definitely be a problem (stumbling).
Therefore the birth of EFi / UEFi is the demands of the times to keep pace with the rapid development of today's computers.
With the development of hardware technology and storage capacity on computers and notebooks are very rapid, then the ability of the BIOS has stuck to support it. Because of the many limitations of the current BIOS that can not be met by the demands of the development of computer hardware, especially for server platforms.
In addition to being found in” server " machines, UEFi is currently being widely used on the latest PC and notebook mainboards.
Examples of the advantages of UEFI technology are, support with the GPT harddrive format, the ability to boot from a hard drive with a large capacity. The GPT (GUID Partition Table) Format is a new format technology for handling hard drives with a capacity of more than 2 terabytes.
During this time we use the MBR format to store the boot code and partition table on the hard drive and save media. But the limitation of this MBR is that the maximum partition size is for the boot system can not be more than 2 TB.
By using the GPT format, the limitations can be overcome easily. The GPT Format began to be used on server computer systems that use super jumbo capacity hard drives. If the HDD is very large then the BIOS will not be able to move. Thus was born the replacement technology that is UEFI as firmware to control the work and performance of the HDD. So guess” the picture.
So in conclusion, for future developments, all computer platforms will switch from legacy BIOS to UEFI firmware. Probably for the next 5 years almost all laptop and PC products made by sdh vendors use UEFI and leave their predecessors: legacy BIOS, which is already 3 decades old.
Most vendors have implemented UEFI as a replacement for BIOS on their products, even because it is still in transition, in UEFI still embedded BIOS legacy features or CSM (Compatibility Support Module).
Perhaps for a period of 3 or 5 years ahead BIOS will be extinct, and all vendors will implement UEFI on their products. What is the difference between BIOS and UEFI? It has been explained above, that in terms of its function between BIOS and UEFI is the same. The difference lies in the features alone, among others:
- UEFI already supports hard drive storage capacity of more than 2 TB, while in BIOS the maximum is 2 TB.
- UEFI already supports the GPT partition type required when installing the latest operating system, especially Windows 10, while BIOS can only run MBR or Master Boot Record partition types.
- It is already possible to use the touchpad, mouse, and even the touchscreen while in UEFI, while in BIOS only use the keyboard.
- Display User Interfacepada UEFI is much more attractive and user friendly than the BIOS that still uses the standard display mode
- Can only support a maximum of 2 TB hard drive only.
- Can only support for the creation of a maximum of 4 Primary partitions only.
- If you want to create more partitions, 1 primary partition must be sacrificed to an extended partitionso that under it can be made several logical partitions.
- Information about the location of the file system and the operating system partition is only stored in the first sector on the hard drive, so if lost or corrupted, the operating system will be damaged.
GPT is also known as GUID Partition Table. That's why it's called GPT which stands for GUID Partition Table. In the GPT drive type, the partition table layout is defined using a globally Unique Identifier.
The presence of GPT is expected to cover the shortcomings of MBR, so that GPT also has many advantages when compared with MBR, including:
1. Supports storage media or hard drives up to 9 ZB (Zettabyte).A Zettabyte is 3 levels above a Terabyte (TB). Above TB there are petabytes (PB), exabytes (EB), zettabytes (ZB), and yottabytes (YB).
2. It can support up to 128 Primary partitions.
3. File system information and the location of the operating system are stored in more than one location, so that if the main one is damaged, the system can still run normally using other backups.
In summary, the difference between MBR and GPT can be summed up into several points below:
A. MBR only supports up to 2 TB of storage capacity, while GPT is capable of supporting up to 9 ZB.
B. MBR can only be made into 4 primary partitions, while the GPT can be divided into 128 primary partitions.
C. In the MBR, information about the location of the file system and the location of the operating system is only stored in the first sector on the hard drive, while the GPT is stored several times as a backup if the main information is damaged or corrupted.
D. MBR can be used to install all operating systems except Windows 10, GPT must be used when installing Windows 10 and the motherboard must support UEFI.
That's about the difference Legacy with UEFI in the BIOS, as well as the GPT partition table system with MBR, now do not be confused in choosing how to make your operating system installer, because it is very clearly explained Here, Thank you, may be useful.