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Hi I'm facing an issue

OS : Ubuntu 20.04.5 LTS

i have my storage set up like this :

lsblk :

sda       8:0    0   400G  0 disk
├─sda1    8:1    0 399.9G  0 part /
├─sda2    8:2    0   512B  0 part
├─sda14   8:14   0     4M  0 part
└─sda15   8:15   0   106M  0 part /boot/efi

I want to reduce the size of sda1 to create a new raw partition for rook-ceph sda3 with 100G

I have tried many solutions but i only end up breaking the filesystem and rebooting again

I hope someone can guide me to the right direction

Romeo Ninov
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ossama assaghir
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1 Answers1

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You can only change this while the disk is not mounted, so you cannot be booted from that disk.

I'd boot from a "live" CD such as GRML and then use the gparted tool from there.

Simon Richter
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