diskpart

diskpart (opens an interactive prompt with its own commands)

A powerful, low-level disk and partition management tool — create, delete, resize, and format partitions and volumes.

// FLAGS

list disk / list volumeshow disks or volumes

select disk Nchoose a disk to operate on

cleanwipe a disk's partition table

create partition primarycreate a new primary partition

// EXAMPLE

Running diskpart, then list disk, select disk 1, clean, create partition primary — the standard sequence to completely wipe and re-partition a disk.

// GOTCHA

clean erases the entire selected disk's partition table with no confirmation prompt — selecting the wrong disk number is catastrophic and unrecoverable without a backup.

// RELATED COMMANDS

format chkdsk Disk Management