Windows uses drive letters (C, D, E, F) to mark system partitions. Windows is always installed on C drive. A and B drives are reserved for floppy disks in DOS era
UEFI is Unified Extensible Firmware Interface, replacing traditional BIOS. BIOS is Basic Input/Output System, pre-installed on motherboard. UEFI stores startup information in .efi files on EFI System Partition
Parted -l command shows partition table type in disk label output. Gdisk tool displays MBR style disks with "MBR style disk" warning. Udisks tool shows GPT partition table type for hybrid GPT/MBR systems. Blkid command requires root access to check partition types
Knowing disk partition type helps configure drives during Windows upgrades. It prevents boot issues after OS disk migration. MBR allows 3 primary + 1 logical partition, GPT allows unlimited
CMD shows partition style by checking asterisk (*) in GPT column. PowerShell command "Get-Disk" displays partition style. Disk Management GUI shows partition style under Volumes
Right-click disk, select Properties, then Volumes tab. Partition style shows GPT, MBR, or MSDOS