The pvs command shows 'unkown device' but UUID and LVM labels are still visible

Issue

• The pvs command shows unkown device but UUID is still visible:

  PV                   VG     Fmt  Attr PSize   PFree DevSize PV UUID                                PMdaFree  PMdaSize  #PMda #PMdaUse 1st PE 
  /dev/sda2            rhel00 lvm2 a--  557.26g    0  557.26g oGJ3R4-3sbr-sVg8-uT9p-N5rN-VUuK-t1YcOh        0   1020.00k     1        1   1.00m
  /dev/sdb             rhel00 lvm2 a--    3.27t    0    3.27t xLh5uF-12J1-zh3L-gNo7-YC00-Fg3I-fPhjZ8        0   1020.00k     1        1   1.00m
  unknown device       rhel00 lvm2 a-m  372.00g    0       0  y39rKh-R9GW-B61u-6yce-n4QO-TCu2-jBpdfM        0         0      0        0   1.00m
  

  • Note how in most cases, if we saw unknown device we would not see a UUID here in pvs output.