Can't mount M2 partition. Known bug?

[Mugsy323]

I have a 500GB M2 drive in my PC that I've split into a 120GB boot partition and a 350GB data partition. The first partition auto-mounts and is fine. The extended/data partition is not only ignored, but "GParted" won't even let me mount it (grayed out.)

Is this a known bug? If not, is there a (non-destructive) way to fix this?

TIA

[Dennis N]

Do you want the data partition to mount on startup? It has to be formatted, and you would need a correct entry in /etc/fstab to do the mounting. If you did these things, post your /etc/fstab and the output of:

 lsblk -o name,fstype,uuid

to check it.

[The Cog]

Maybe there is a small misunderstanding here: An extended partition is not a data partition - it is a partition that acts as a container for logical partitions. So your 350G data partition needs to be a logical partition: all logical partitions you create will automatically be placed inside the extended partition (until the extended partition is full, of course).
Hope this helps.

[oldfred]

Generally it is better to use gpt partitioning. Then no primary, extended, logical partitions. Just one type, essentially all primary.

But if BIOS booting you need a 1 or 2MB unformatted partition with bios_grub flag.
Or if UEFI booting need the ESP - efi system partition 300 to 500MB FAT32 with esp,boot flags.

GPT Advantages (older 2010 but still valid) see post#2 by srs5694:
http://ubuntuforums.org/showthread.php?t=1457901 &
https://wiki.archlinux.org/index.php...antages_of_GPT