# BadPhysicalOffset = 66630409 - 2048 = 66628361

# pvdisplay -c /dev/sdb1 | awk -F: '{print $8}'
4096

# pe_size=2*x = 8192
# pe_start = 8192
# BadPE = 8133




################################################################################
basement ~ # smartctl -l selftest /dev/sdb
smartctl 7.0 2018-12-30 r4883 [x86_64-linux-4.19.66-gentoo] (local build)
Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed: read failure       90%     16993         66630409
# 2  Short offline       Completed: read failure       90%     16978         66630410
# 3  Extended offline    Completed: read failure       90%     16969         66630736
# 4  Short offline       Completed: read failure       90%     16969         66630413
# 5  Extended offline    Completed: read failure       90%     16954         66630408
# 6  Short offline       Completed: read failure       90%     16954         66630409

basement ~ # fdisk -l /dev/sdb
Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: WDC WD20EZRZ-00Z
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: B3B40081-0CA7-4BD8-9243-15B7E0B57545

Device     Start        End    Sectors  Size Type
/dev/sdb1   2048 3907029134 3907027087  1.8T Linux LVM
basement ~ # #pvdisplay -c /dev/sda3 | awk -F: '{print $8}'
basement ~ # pvdisplay -c /dev/sda3 | awk -F: '{print $8}'
  Failed to find device for physical volume "/dev/sda3".
basement ~ # pvdisplay -c /dev/sdb1 | awk -F: '{print $8}'
4096
basement ~ # grep 8192 $(grep -l /dev/sda3 /etc/lvm/backup/*)
^C
basement ~ # grep 8192 $(grep -l /dev/sdb1 /etc/lvm/backup/*)
/etc/lvm/backup/lvm:    extent_size = 8192              # 4 Megabytes
/etc/lvm/backup/lvm-old:        extent_size = 8192              # 4 Megabytes
basement ~ # lvdisplay lvm --maps |egrep 'Physical|LV Name|Type'
  LV Name                photos
    Type                linear
    Physical volume     /dev/sdb1
    Physical extents    0 to 127999
  LV Name                music
    Type                linear
    Physical volume     /dev/sdb1
    Physical extents    128000 to 204799
  LV Name                public
    Type                linear
    Physical volume     /dev/sdb1
    Physical extents    204800 to 255999
  LV Name                extra
    Type                linear
    Physical volume     /dev/sdb1
    Physical extents    256000 to 332799
  LV Name                videos
    Type                linear
    Physical volume     /dev/sdb1
    Physical extents    334592 to 411391
    Type                linear
    Physical volume     /dev/sdb1
    Physical extents    411648 to 462847