13.4. Setting a Partition Type
You can start the fdisk utility and use the t command to set the partition type. The following example shows how to change the partition type of the first ...
fdisk(8) - Linux manual page
DOS-type (MBR) A DOS-type partition table can describe an unlimited number of partitions. In sector 0 there is room for the description of 4 partitions ...
8. Partition Types
There is a numerical code associated with each partition type. For example, the code for ext2 is 0x83and linux swap is 0x82(0x mean hexadecimal).
fdisk
fd is the type code used for Linux RAID by MBR partitioning schemes. But your disk is partitioned using the GPT scheme.
fdisk
Partition type. When using MBR, fdisk will ask for the MBR partition type. Specify it, type p to create a primary partition or e to create an ...