'blk_update_request: critical nexus error dev dm-X, sector xyz' messages logged

Solution In Progress - Updated -

Issue

  • what is the cause of 'critical nexus' errors?
  • what is a 'critical nexus' error?
  • what is the difference between a 'critical nexus' and a 'critical target' error?
  • error events being logged
kernel: sd 33:0:1:0: reservation conflict
kernel: sd 33:0:1:0: [sdc] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK
kernel: sd 33:0:1:0: [sdc] CDB: Read(10) 28 00 ba df ff f8 00 00 08 00
kernel: blk_update_request: critical nexus error, dev sdc, sector 3135242232
kernel: Buffer I/O error on dev sdc, logical block 391905279, async page read

Environment

  • Red Hat Enterprise Linux

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