On December 6, 2018 10:03:31 AM UTC, Neil Bothwick <neil@digimed.co.uk> wrote:

On Thu, 6 Dec 2018 03:27:31 -0600, Dale wrote:

Now to the second question.  I found a 8TB hard drive and bought it.  My
plan is to take my 6TB backup drive and install it in place of a 3TB
drive which has LVM on it.  I plan to use the 8TB drive as a external
backup drive in the end.  Will do a backup before changing internal
drives tho.  From what I've read, I can use pvmove and pvremove to
replace that drive.  Just tell pv to move the data and when done, remove
the old drive. After that, the new 6TB drive will be used in that PV and
the 3TB drive can be used for something else.  Is it really that easy or
is there more to it than that?  Pardon me but that doesn't sound
complicated enough to me.  lol 

It's been a while since I did that but AFAIR, yes it is that simple.
pvmove does all the hard work and it can take a while, but it can survive
an interruption.