BIOS, UEFI, MBR, GPT, Primary, Extended and Logical Partition Types Explained
This video explains the following topics.
What is a firmware?
Type of firmware.
How the system boots.
A firmware performs the following tasks
Initialize all hardware devices
Find the bootloader program
Execute the bootloader program
MBR
MBR is a classical way to store a bootloader and partition information.
It saves information on the first 512 bytes of the hard disk.
Only BIOS-based systems use MBR.
MBR is non-redundant.
MBR can store partition information for a hard disk of up to 2 TB.
MBR supports a maximum of 14 partitions.
GPT
GPT is a modern way to store a bootloader and partition information.
It uses 4Kb disk space after the first 512 bytes of the hard disk.
Both BIOS and UEFI-based systems can use it.
GPT is redundant.
GPT can store partition information for a hard disk of up to 18 exabytes.
MBR supports a maximum of 128 partitions.
BIOS
It stands for Basic Input Output System.
It operates in 16-bit mode.
It was released in 1975.
It provides only basic UI navigation using the keyboard.
It supports up to 14 partitions.
It supports a maximum partition size of 2 TB (Tera Byte).
It takes a bit longer time to boot the system.
It supports password protection.
UEFI
It stands for Unified Extensible Firmware Interface.
It operates in 32-bit and 64-bit modes.
It was released in 2002.
It provides graphical UI navigation with mouse support.
It supports up to 128 partitions.
It supports a maximum partition size of 18 EB (Exabyte).
It takes only a few seconds to boot the system.
It supports secure boot features.
Пікірлер: 6
Hi Thanks for this video. Very good explaination, just 1 query that in 4:00 min of video you mentioned that MBR can support 14 partitions i am not clear with this portion. Because i know and further you also mentioned in video that MBR support 4 partitions. Please help i am confused in this portion.
@computernetworkingnotesyoutube
Ай бұрын
MBR supports three types of partition: primary, extended, and logical on a single disk. We can use only primary and logical partitions for data storage. We cannot use the extended partition for data storage. It stores logical partitions. Technically, MBR supports only four primary partitions numbered from 1 to 4. If we need more partitions, we need to convert the last primary partition into the extended partition. Inside the extended partition, we can create up to 11 logical partitions. Thus, we can create a maximum of 14 usable partitions (3 primary and 11 logical) on a single disk. The numbering for the logical partitions starts at 5.
Can’t you use LVM with GPT? I think I saw some KZreadr do that
@computernetworkingnotesyoutube
4 ай бұрын
You can use LVM with GPT. LVM is a partition type while GPT is how the hard disk stores partition information.
Imagine creating a separate partition for every different type of file on your system
@computernetworkingnotesyoutube
4 ай бұрын
Ya, you can do it. But you should create partitions based on your requirement rather than one for each type.