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oot@ubuntu:/home/ubuntu# gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.6.14

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 625142448 sectors, 298.1 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 98CAF8C3-4B58-416D-8F7E-A603F0B07098
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 625142414
Partitions will be aligned on 2048-sector boundaries
Total free space is 2669 sectors (1.3 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048            4095   1024.0 KiB  EF02
   2            4096          413695   200.0 MiB   EF00
   3          413696        42356735   20.0 GiB    0700
   4        42356736       625141759   277.9 GiB   0700