Issue

• VM failing with critcal I/O error on RHEL 7.4 hypervisor

  Nov 10 15:13:42 system1 kernel: blk_update_request: critical target error, dev sda, sector 95344
  Nov 10 15:13:42 system1 kernel: Buffer I/O error on dev dm-2, logical block 8004, lost async page write
  Nov 10 15:13:42 system1 kernel: Buffer I/O error on dev dm-2, logical block 8005, lost async page write
  Nov 10 15:13:42 system1 kernel: Buffer I/O error on dev dm-2, logical block 8006, lost async page write
  Nov 10 15:13:42 system1 kernel: Buffer I/O error on dev dm-2, logical block 8007, lost async page write
  Nov 10 15:14:12 system1 kernel: sd 2:0:0:1: [sda] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
  Nov 10 15:14:13 system1 kernel: blk_update_request: critical target error, dev sda, sector 145136
  Nov 10 15:14:13 system1 kernel: sd 2:0:0:1: [sda] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
  Nov 10 15:14:13 system1 kernel: blk_update_request: critical target error, dev sda, sector 144128 
  

• A virtual machine is failing I/O and dmesg output showing error messages like the following

  [Nov13 17:44] sd 2:0:0:1: [sda] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
  [  +0.000936] sd 2:0:0:1: [sda] Sense Key : Illegal Request [current]
  [  +0.000000] sd 2:0:0:1: [sda] Add. Sense: Invalid field in cdb
  [  +0.000000] sd 2:0:0:1: [sda] CDB: Read(10) 28 00 00 00 14 40 00 03 e9 00
  [  +0.000000] blk_update_request: critical target error, dev sda, sector 5184
  [  +0.000000] sd 2:0:0:1: [sda] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
  [  +0.000000] sd 2:0:0:1: [sda] Sense Key : Illegal Request [current]
  [  +0.008123] sd 2:0:0:1: [sda] Add. Sense: Invalid field in cdb
  [  +0.000374] sd 2:0:0:1: [sda] CDB: Read(10) 28 00 00 00 18 29 00 03 f0 00
  [  +0.000489] blk_update_request: critical target error, dev sda, sector 6185