How to change my partition type id from 83 to 8e without formatting and losing data?
fdisk on the appropriate disk, for example
sudo fdisk /dev/sdb
Press t to change the type of a partition. If there are several, you will be asked which one you want to change:
Partition number (1,2, default 2):
If there’s only one,
fdisk will tell you it’s automatically selecting it:
Selected partition 1
Once the partition is selected,
fdisk will ask what type you want:
Partition type (type L to list all types):
Enter “8e” here. Press p to check the result, then w to write it to disk if the changes are OK or q to quit without saving.
This won’t touch the contents of the partition, you won’t lose any data. It also won’t set LVM up, if that’s what you’re really after.