When I fire up command :
`gdisk /dev/nvme0`, and input `p`,
I got these:
```
Disk /dev/nvme0n1: 500118192 sectors, 238.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): E37EBCC8-2251-420B-B2A6-3B515E3D2892
Partition table holds up to 128 entries
First usable sector is 34, last usable...