[root@rescue archive]# vgscan
  Reading all physical volumes.  This may take a while...
  /dev/sdc: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 2147418112: Input/output error
  /dev/sdc: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdd: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdd: read failed after 0 of 4096 at 2147418112: Input/output error
  /dev/sdd: read failed after 0 of 4096 at 0: Input/output error
  Found volume group "sys" using metadata type lvm2
  Found volume group "sys" using metadata type lvm2
[root@rescue archive]# vgdisplay
  /dev/sdc: read failed after 0 of 4096 at 0: Input/output error
  /dev/sdd: read failed after 0 of 4096 at 0: Input/output error
  --- Volume group ---
  VG Name               sys
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.93 GB
  PE Size               4.00 MB
  Total PE              495
  Alloc PE / Size       125 / 500.00 MB
  Free  PE / Size       370 / 1.45 GB
  VG UUID               SM77DT-vxpu-U24w-ltCF-uWjp-xVjY-ebsvYT

  --- Volume group ---
  VG Name               sys
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  22
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.93 GB
  PE Size               4.00 MB
  Total PE              495
  Alloc PE / Size       356 / 1.39 GB
  Free  PE / Size       139 / 556.00 MB
  VG UUID               o6esqK-hF8S-WeMp-DQek-FMUt-runL-dN8h2p