On 06/08/2018 02:36 PM, Nataraj wrote: > On 06/08/2018 12:34 PM, Ulf Volmer wrote: >> On 08.06.2018 19:11, Matt wrote: >>> I have a Centos 7 install using EXT4 on LVM. Its running as a VM >>> inside KVM. Issue I have run into is that fstrim does not work due to >>> the LVM. Without fstrim snapshots have gotten huge. Is there a way >>> convert it from LVM to non-LVM without a complete reinstall? I think that what your dealing with is an issue of file systems in a virtual machine. I don't think you can shrink a filesystem in a virtual machine just by deleting files from it. Here's one explanation of how to do this. I'm not sure about zeroing out the free space on the partition (might be necessary, I don't know), but you do need to recover space from the qemu image using something similar to what is show in this post. It is the "qemu-img convert" that actually recovers the space, but only after you have reduced the usage in the VM. https://mindref.blogspot.com/2011/07/shrink-qcow2.html This has nothing to do with trim (though still a good idea to enable trim for your SSD for other reasons). Nataraj