[linux-lvm] Extend VG - Expand LUN vs New Disk

[Jorge Fábregas]

Hi everyone,

Are there any major differences between expanding an existing LUN
(already striped & mirrored on storage-array) and use pvresize &
"lvextend -r ..." vs adding a new disk to your VG when you need to
expand an existing filesystem?

At work we do the latter and almost everyone believes expanding an
existing LUN is not a safe operation.  Is there really a preferred
method? Or is it just a matter of personal preference?

Thanks!
Jorge