I agree that this report shows 'total' bytes written over the life of the volume. The Display Media Attributes (Work with media, then option 5 next to a volume) shows Current Bytes Written. However it is not as accurate as PRTERRLOG.
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Wednesday, August 21, 2013 11:25 AM
To: Midrange Systems Technical Discussion
Subject: RE: How to Determine Backup Size
BRMS says from "creation" date. I don't think you can reset those numbers (short of removing the volume from inventory).