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I've setup RHEL7 with default partitioning, and they partitioned it as following:

/dev/mapper/rhel-home 100GB /home
/dev/mapper/rhel-root 50GB /

Both are on xfs filesystem. How can i shift most of my diskspace from /home to / ?

I've tried the below code

umount /home
lvreduce -rL -10G /dev/mapper/rhel-home
lvextend -rL +10G /dev/mapper/thel-root

But it doesnt seem to work because xfs file system does not support shrinking.

  • Let's see your outputs of 'pgdisplay', 'vgdisplay' and 'lvdisplay' please – Chopper3 May 12 '16 at 9:52
  • Not to mention df. – Law29 May 12 '16 at 10:50
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Assuming you have space in your root filesystem, I would do:

mkdir /opt/home && mv /home/* /opt/home && umount /home && rmdir /home && ln -s /opt/home /home

At this point you can destroy your rhel-home volume and recreate it again with the desired (shrinked) size, adding the remaining space to your rhel-root volume, then:

rm /home && mkdir /home &&  mount /home && mv /opt/home/* /home/ && rmdir /opt/home

I know seems complicated but it works.

| improve this answer | |
  • for your second command, should it be mkdir /home instead of rm /home? – stiffy May 12 '16 at 10:03
  • it's the link that points to /opt/home created in the first command, so yes, it's rm. But you're roght, i missed a mkdir. Fixed thnx! – Fredi May 12 '16 at 10:09
  • Do you happen to have a guide for destroy and recreating of logical volume – stiffy May 12 '16 at 10:18
  • You can check here: tldp.org/HOWTO/LVM-HOWTO/index.html – Fredi May 12 '16 at 10:36
  • appreciate the advice Fredi =) – stiffy May 12 '16 at 15:59

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