The "w" character would be required to be typed at the fdisk prompt to change the type of partition.
What is a fdisk?
In computing, the disk-partitioning features of the fdisk command-line application are available as a prelude to establishing file systems. FDISK has some restrictions. Without uninstalling and reinstalling the software, you cannot move applications from one partition to another.
Partitions bigger than 2 TB can't be made with fdisk. Users of desktop computers and laptops can get away with this, but a Linux server requires a much larger disk.
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