[linux-lvm] unable to activate partial

[c3]

I am at a loss on how to move forward in troubleshooting this.

vgdisplay reports one missing PV

WARNING: Device for PV 1TJmAk-i5OP-jv86-nAXH-wUI2-LNMA-eoya4m not  
found or rejected by a filter.
   --- Volume group ---
   VG Name               vg_raid6
   System ID
   Format                lvm2
   Metadata Areas        7
   Metadata Sequence No  6
   VG Access             read/write
   VG Status             resizable
   MAX LV                0
   Cur LV                1
   Open LV               0
   Max PV                0
   Cur PV                8
   Act PV                7
   VG Size               29.11 TiB
   PE Size               4.00 MiB
   Total PE              7630888
   Alloc PE / Size       5723160 / 21.83 TiB
   Free  PE / Size       1907728 / 7.28 TiB
   VG UUID               5sf020-Ce7P-NE2n-oYtk-mjkq-LGTg-ODolbj



But mapper says 3 failed

Jan  4 22:14:33 barbie kernel: device-mapper: raid: Failed to read  
superblock of device at position 5
Jan  4 22:14:33 barbie kernel: device-mapper: raid: Discovered old  
metadata format; upgrading to extended metadata format
Jan  4 22:14:33 barbie kernel: md/raid:mdX: not clean -- starting  
background reconstruction
Jan  4 22:14:33 barbie kernel: md/raid:mdX: device dm-12 operational  
as raid disk 2
Jan  4 22:14:33 barbie kernel: md/raid:mdX: device dm-14 operational  
as raid disk 3
Jan  4 22:14:33 barbie kernel: md/raid:mdX: device dm-16 operational  
as raid disk 4
Jan  4 22:14:33 barbie kernel: md/raid:mdX: allocated 6490kB
Jan  4 22:14:33 barbie kernel: md/raid:mdX: not enough operational  
devices (3/6 failed)
Jan  4 22:14:33 barbie kernel: md/raid:mdX: failed to run raid set.
Jan  4 22:14:33 barbie kernel: md: pers->run() failed ...
Jan  4 22:14:33 barbie kernel: device-mapper: table: 253:21: raid:  
Failed to run raid array
Jan  4 22:14:33 barbie kernel: device-mapper: ioctl: error adding  
target to table



Attached is the output of vgchange -ay -vvvv
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