I recently ran into the case that an LVM snapshot overflowed. The reasons are unclear:* there was probably no write access to the origin at all* both snapshot and origin have same size (100g, 25600 extends)* according to the documentation this should never happen in this caseNow I would like to attempt to recover (part) the disk from the last state.I would assume that most of the disk should be still in a reasonable state and somewhere in my volume group.However I could not find a way to do this, a simple dd fails with read errors.In case it matters, the volume contains a virtual machine.
recover last state of full lvm snapshot
lvm;device mapper