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GPT brings with it many advantages, but MBR is still the most compatible & is still necessary in some cases. This isn’t a Windows-only standard, by the way—Mac OS X, Linux, & other operating systems can also use GPT.
GPT, or GUID Partition Table, is a newer standard with many advantages including support for larger drives & is required by most modern PCs. Only choose MBR for compatibility if you need it.
A partition structure defines how information is structured on the partition, where partitions begin and end, & also the code that is used during startup if a partition is bootable. If you’ve ever partitioned & formatted a disk—or mix up a Mac to lớn dual boot Windows—you’ve likely had to khuyễn mãi giảm giá with MBR và GPT. GPT is the new standard and is gradually replacing MBR.
What bởi vì GPT và MBR Do?
You have lớn partition a disk drive before you can use it. MBR (Master Boot Record) and GPT (GUID Partition Table) are two different ways of storing the partitioning information on a drive. This information includes where partitions begin và end on the physical disk, so your operating system knows which sectors belong khổng lồ each partition & which partition is bootable. This is why you have khổng lồ choose MBR or GPT before creating partitions on a drive.
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MBR’s Limitations
MBR was first introduced with IBM PC DOS 2.0 in 1983. It’s called Master Boot Record because the MBR is a special boot sector located at the beginning of a drive. This sector contains a boot loader for the installed operating system và information about the drive’s logical partitions. The boot loader is a small bit of code that generally loads the larger boot loader from another partition on a drive. If you have Windows installed, the initial bits of the Windows boot loader reside here—that’s why you may have to repair your MBR if it’s overwritten and Windows won’t start. If you have Linux installed, the GRUB boot loader will typically be located in the MBR.
MBR does have its limitations. For starters, MBR only works with disks up to 2 TB in size. MBR also only supports up khổng lồ four primary partitions—if you want more, you have lớn make one of your primary partitions an “extended partition” and create logical partitions inside it. This is a silly little hack và shouldn’t be necessary.
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GPT’s Advantages
GPT stands for GUID Partition Table. It’s a new standard that’s gradually replacing MBR. It’s associated with UEFI, which replaces the clunky old BIOS with something more modern. GPT, in turn, replaces the clunky old MBR partitioning system with something more modern. It’s called GUID Partition Table because every partition on your drive has a “globally chất lượng identifier,” or GUID—a random string so long that every GPT partition on earth likely has its own chất lượng identifier.
GPT doesn’t suffer from MBR’s limits. GPT-based drives can be much larger, with size limits dependent on the operating system & its file systems. GPT also allows for a nearly unlimited number of partitions. Again, the limit here will be your operating system—Windows allows up lớn 128 partitions on a GPT drive, và you don’t have khổng lồ create an extended partition to make them work.
On an MBR disk, the partitioning & boot data is stored in one place. If this data is overwritten or corrupted, you’re in trouble. In contrast, GPT stores multiple copies of this data across the disk, so it’s much more robust và can recover if the data is corrupted.
GPT also stores cyclic redundancy check (CRC) values to kiểm tra that its data is intact. If the data is corrupted, GPT can notice the problem và attempt to recover the damaged data from another location on the disk. MBR had no way of knowing if its data was corrupted—you’d only see there was a problem when the boot process failed or your drive’s partitions vanished.
Compatibility
GPT drives tend khổng lồ include a “protective MBR.” This type of MBR says that the GPT drive has a single partition that extends across the entire drive. If you try to lớn manage a GPT disk with an old tool that can only read MBRs, it will see a single partition that extends across the entire drive. This protective MBR ensures the old tools won’t mistake the GPT drive for an unpartitioned drive và overwrite its GPT data with a new MBR. In other words, the protective MBR protects the GPT data from being overwritten.
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Windows can only boot from GPT on UEFI-based computers running 64-bit versions of Windows 10, 8, 7, Vista, and corresponding vps versions. All versions of Windows 10, 8, 7, và Vista can read GPT drives and use them for data—they just can’t boot from them without UEFI.
Other modern operating systems can also use GPT. Linux has built-in tư vấn for GPT. Apple’s intel Macs no longer use Apple’s APT (Apple Partition Table) scheme & use GPT instead.
You’ll probably want lớn use GPT when setting up a drive. It’s a more modern, robust standard that all computers are moving toward. If you need compatibility with old systems — for example, the ability khổng lồ boot Windows off a drive on a computer with a traditional BIOS — you’ll have khổng lồ stick with MBR for now.
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