sudo fdisk -l
Device Boot Start End Sectors Size Id Type/dev/sda1 * 8192 124927 116736 57M e W95 FAT16 (LBA)/dev/sda2 124928 3907028991 3906904064 1.8T 83 Linuxsudo fdisk /dev/sda
Press d
2 for partition 2
Press D again to delete partition 1.
p to verify they are gone
w to write changes
reboot os. I still saw old partitions in df -th. But the where gone after reboot.