GPT is shortened for the “GUID Partition Table”. It was initially introduced as the part of the UEFI (Unified Extensible Firmware Interface) initiative. This GPT gives a very flexible way of disk partitioning, much more flexible than the earlier MBR (Master Boot Record) scheme of partitioning the disks which was very commonly used in the PCs before.
A disk partition is basically a very contiguous storage space on a physical hard drive or on a logical drive, which generally functions as separate physical disk. These partitions are very much visible to all the installed OSs and also to system firmware. Initially, the access to the partition is in control of the system firmware before the booting of the OS by the system, and after that, it is controlled by the OS itself after being started.
A great benefit of GPT is that these disks can easily grow to a huge size. The quantity or number of partitions on a specific GPT disk is not guarded or constrained by the temporary schemes like container partitions as it used to be earlier in the MBR EBR (Extended Boot Record). The partition format for the GPT disk is highly well-defined as well as it is completely self-identified. The data, which is critical to the platform operations, is saved in the partitions and it is not there in the hidden or un-partitioned sectors. The GPT disk/disks make use of the backup & primary partition tables for the purpose of redundancy as well as the CRC32 fields for better and advanced data structure integrity of the partitions. This partition format makes use of the version number as well as the size fields for forthcoming expansions. Each of these partitions has an exclusive GUID identification as well as a partition content type, and therefore, there is no chance of any partition identification collision. Each partition has a Unicode name with 36-characters. This precisely implies that that any such software will give a humanly-understandable and humanly-readable name for that partition without the need of any extra understanding about that partition. A well-protective MBR area is there on the GPT partition table which is there for the backward compatibility along with multiple utilities for disk management, which all operate on the MBR. It is the GPT header, which clearly defines its logical block addresses range that are to be used by the partition entries. Also, the header even defines the GTP location on the particular disk. It also defined its GUID, as well as a 32-bit CRC32 (cyclic redundancy check) checksum, which would be utilized for verifying the GPT header integrity. Every single entry in this GUID partition table starts with one particular partition type GUID. Also note that every partition entry of GUID has its backup copy.
A good professional GPT Protective Partition Data Recovery software solution can easily help you in recovering lost data that might have been lost either due to sudden deletions, formatting, raw partitioning, virus attacks, or system crash etc. from the GPT disk. Most of such tools have very easy-to-perform operation steps along with a very user-interactive and friendly interface. Also in the situation where your GPT data is overwritten by some fresh content, chances of recovery are low, but you can try any such good tool to get back a large percentage of that data back. Under any such difficult circumstances, a professional recovery tool is definitely a very good choice to make for solving the problem.