Resize /dev/pve/data and transfer it to /dev/pve/root

Jonathan Luigi

New Member
Jan 28, 2017
1
0
1
26
Hi Friends,

Ive recently installed proxmox4.4 on a machine that has 2TB of disk space.
The default partition was:
96GB for /dev/mapper/pve-root
8GB for /dev/mapper/pve-swap


and the rest of the disk size was allocated to /dev/pve/data.

What i would want to do is resize/reduce the disk size of /dev/pve/data by 500GB and transfer that space to /dev/pve/root.
Currenty, I already have 2 VMs running on proxmox.

Is there a way to this without a rescue CD? Any form of help would be great.

Thanks!
Jonathan
 

Mr.Holmes

Member
Apr 5, 2014
281
2
16
Hello Jonathan

Hi Friends,

Ive recently installed proxmox4.4 on a machine that has 2TB of disk space.
The default partition was:
96GB for /dev/mapper/pve-root
8GB for /dev/mapper/pve-swap


and the rest of the disk size was allocated to /dev/pve/data.

What i would want to do is resize/reduce the disk size of /dev/pve/data by 500GB and transfer that space to /dev/pve/root.
Currenty, I already have 2 VMs running on proxmox.

Is there a way to this without a rescue CD? Any form of help would be great.
It depends which filesystem you have at /dev/pve/data resp. /dev/pve/root

* In case of ext(2,3,4):

- shrink the filesystem at /dev/pve/data by resize2fs

- shrink the logical volume by lvreduce - be careful to not make it less than the filesystem has been reduced to, see https://blog.shadypixel.com/how-to-shrink-an-lvm-volume-safely/

- extend the volume /dev/pve/root by lvextend

- extend the filesystem at /dev/pve/root by resize2fs

* in case of xfs:

- xfs filesystem cannot be reduced, therefore copy all current files in /dev/pve/data to a save place

- shrink the logical volume by lvreduce

- create a new filesystem at it and restore the previously saved files

- extend the volume /dev/pve/root by lvextend

- extend the filesystem by xfs_grows (see respective man page)

Success!

Mr.Holmes
 

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