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HOWTO: Resize a Linux VM's LLVM Virtual Disk on a ZVOL

The instructions worked flawlessly on TrueNAS-CORE 12 and Ubuntu Server 20.04.
So thankful for finding this. Brilliantly written and well explained. It was so frustrating trying to figure out how to expand the LVM to utilise the whole zvol and this was exactly what I needed.
By far, a large distance is the clearest and simpler instruction set.
The instructions a perfectly clear. I'd add a simple precision:
If your volume is completely full, pvresize will fail. To free some space, the easiest way is to use the command sudo apt-get clean.
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