When partitioning a hard drive with fdisk , the o option help says "create a new empty dos partition table".
what does this do actually..?
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There's 2 types of partition tables commonly found on PC's: DOS (the traditional kind) and GPT (the newer, slightly less compatible kind). The
o option will nuke your partition table, destroying all of your partition definitions. This can be useful if it's corrupted or you just want to start fresh with your disk.