On Tue, 2025-11-18 at 00:37 +0100, Zdenek Kabelac wrote: > > > Hi
Hi! > You can always create 'new LV' on the PV you prefer to use and then > with good > old 'dd' command copy deviceA->deviceB - preferably while device > your are > copying is not in use (i.e. if you are copying LV which holds your > filesystem > - the partition should not be mounted) - once all your data are > copied you > just reconfigure fstab to mount different new LV. Yes, indeed, of course that is one way. And I do appreciate the effort of you taking the time to suggest that. But not having to do these kinds of off-line bulk data copy operations is one of the major attractions of LVM. Once we have to start reverting back to the more cumbersome and interrupting methods the added complexity of LVM starts to lose it's attraction and value. > lvm2 does not (ATM) support this kind of operation. Pity that one has to choose between efficient space use and efficient snapshots or being able to migrate data live but cannot have both. :-( Is being able to do this on the roadmap at least or will this always remain a fundamental limitation? Cheers, b.
