How to change "Linux filesystem" partition type to "extended" ?

helen314 · 06-12-2019, 05:00 PM

I am trying to change "Linux filesystem" AKA "primary partition " to "extended partitions " so I can assign "logical perditions".

Using "fdisk " "L" does not list anything close to "extended" partition.

Is "extended partition" term not used in Linux?

I should be able to just change partition type using option "t".
What am I doing wrong ?

Quote:

ubuntu@ubuntu:~$ sudo fdisk -l
Disk /dev/loop0: 1.5 GiB, 1601015808 bytes, 3126984 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/sda: 1.8 TiB, 2000398933504 bytes, 3907029167 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 33553920 bytes
Disklabel type: gpt
Disk identifier: B6340A86-535D-439C-8211-6A797B9A2C29

Device Start End Sectors Size Type
/dev/sda1 65535 1048559 983025 480M EFI System
/dev/sda2 1048560 410648559 409600000 195.3G Linux filesystem
/dev/sda3 3905034045 3907000094 1966050 960M Linux swap
/dev/sda4 410648576 3905032191 3494383616 1.6T Linux filesystem

Partition 1 does not start on physical sector boundary.
Partition 3 does not start on physical sector boundary.
Partition table entries are not in disk order.

Mechanikx · 06-12-2019, 05:21 PM

Yes, extended partitions exist in linux but only with MBR. If you wanted more than 4 partitions you would create 3 primary and 1 extended. Then divide up the extended.

You have gpt(not MBR) so you don't need an extended partition.

michaelk · 06-12-2019, 05:26 PM

Your disk is using GPT and does not have or use extended/logical partitions.

Just create another partition which will automatically be numbered as 5.

Disks that use MBR still need Extended/logical partitions to have more then 4 partitions but GPT does not.

Too late...

helen314 · 06-12-2019, 07:40 PM

Quote:

Originally Posted by michaelk

Your disk is using GPT and does not have or use extended/logical partitions.

Just create another partition which will automatically be numbered as 5.

Disks that use MBR still need Extended/logical partitions to have more then 4 partitions but GPT does not.

Too late...

Too late? for what ?

In different English - GPT and UEFI / EFI should use simple term "partition" since there are no "primary" nor
"logical partitions".
Of course expecting on line "documentation" , including Gparted, to reflect that is pretty naive.

Thanks

Problem solved

michaelk · 06-12-2019, 07:51 PM

Sorry, too late meaning someone else has posted the answer first.

jefro · 06-13-2019, 10:10 PM

Disklabel type: gpt

Mechanikx noticed that right off. I'd have missed it.

However this may or may not need to be looked at. "
Your hard disk has Advanced Format 4096-byte sectors to which the partition is not perfectly aligned" https://askubuntu.com/questions/1569...ector-boundary Or you have some prior mbr deal maybe?