Partitions are not MBR or GPT. Physical disks are MBR or GPT. To talk about a partition being GPT or MBR is impossible. To talk about C drive, D drive, E drive, etc being MBR or GPT is impossible. Also, a GPT disk is NOT required to boot in UEFI mode. UEFI can boot from a GPT or MBR disk.
Physical disks are MBR or GPT:
Code:
DISKPART> list disk
Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 476 GB 0 B *
Disk 1 Online 476 GB 1024 KB *
Each disk can have multiple partitions. The partitions are not MBR or GPT. The partitions may contain file systems and drive letters:
Code:
DISKPART> select disk 0
Disk 0 is now the selected disk.
DISKPART> list partition
Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 Reserved 16 MB 1024 KB
Partition 2 Primary 404 GB 17 MB
Partition 3 Primary 64 GB 404 GB
Partition 4 Primary 8 GB 468 GB
DISKPART> list volume
Volume ### Ltr Label Fs Type Size Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 D Data NTFS Partition 404 GB Healthy
Volume 1 NTFS Partition 64 GB Healthy
Volume 2 R RECOVERY FAT32 Partition 8 GB Healthy
Volume 3 C Win10 NTFS Partition 348 GB Healthy Boot
Volume 4 E Insider NTFS Partition 128 GB Healthy
Volume 5 NTFS Partition 478 MB Healthy
Volume 6 FAT32 Partition 100 MB Healthy System
We have no idea what @
tushar4544's system consists of. Is it one physical drive with multiple partitions assigned to multiple drive letters? Is it multiple physical drives? Which physical disks are MBR or GPT? We don't know. We don't have enough information to offer valid advice.
Also, a GPT drive is not a requirement to boot in UEFI mode. UEFI can boot from an MBR or GPT disk. However, to boot in legacy BIOS (CSM) mode, the system drive must be MBR.