I'm guessing this simply indicates that the kernel device name 
associated with the PV has changed.  Is that correct?

Jul 28 16:50:58 hostname lvm[1424]:   PVID 
6seLWa-Oz2d-jZIC-Ox17-MPaB-QGu5-uElsKN read from /dev/sdb1 last written 
to /dev/sdd1.

No idea what this means.  Should we be using quick activation?  Is it a 
result of the above?

Jul 28 16:50:58 hostname lvm[1424]:   pvscan[1424] VG vg_leka not using 
quick activation.

Thanks!

-- 
Orion Poplawski
Manager of NWRA Technical Systems          720-772-5637
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
3380 Mitchell Lane                       orion@nwra.com
Boulder, CO 80301                 https://www.nwra.com/