Keep getting "Invalid partition table error"

[jacatone]

Can't figure this problem out. I've set the BIOS to boot from UEFI and disabled Legacy setting but get this error message in my Dell Latitude E6430s laptop. Then it reverts back to the Legacy settings. Don't see any kind of revert to defaults setting. Shows the following query.

admin1@Latitude-E6430s:~$ sudo gdisk -l /dev/sda2
GPT fdisk (gdisk) version 1.0.8

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

Creating new GPT entries in memory.
Disk /dev/sda2: 624091136 sectors, 297.6 GiB
Sector size (logical/physical): 512/4096 bytes
Disk identifier (GUID): 18B3B973-650A-41FC-9D7A-202DCE61EE47
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 624091102
Partitions will be aligned on 2048-sector boundaries
Total free space is 624091069 sectors (297.6 GiB)

[GreyGeek]

What does
sudo sfdisk -l /dev/sda
show?

[oshunluvr]

I don't know if you're explaining the issue properly because I see no mention of the error message you have in the title. If you are trying to convert from MBR disk partitioning to GPT and are unable to, it can be caused by lack of space for the GPT partition table. The "end" of the disk is used for a backup table. Try shrinking the last partition on the disk so there's a little free space after it and trying again.

If this is not your issue, please provide more detail on what the issue actually is.

[claydoh]

admin1@Latitude-E6430s:~$ sudo gdisk -l /dev/sda2
GPT fdisk (gdisk) version 1.0.8

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

I *think* You want to use gdisk on the whole drive, not a single partition. Use just sda for this

$ sudo gdisk -l /dev/sda1

GPT fdisk (gdisk) version 1.0.8

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

Using /dev/sda (no number)

​$ sudo gdisk -l /dev/sda


GPT fdisk (gdisk) version 1.0.8

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

Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 2000409264 sectors, 953.9 GiB

[oshunluvr]

Good catch

[Qqmike]

Yeah, I missed that, although I thought the OP output was strange.