I get an I/O error in a RHEL/VMware/SAN environment, how to analyze this?

Solution Verified - Updated -

Issue

  • I get an I/O error in a RHEL/VMware/SAN environment, how to analyze this?
  • I have a VM on an ESXi host. It logged a write I/O failure which caused the Oracle DB to go down. The ESX host just logged a path failure to the datastore, but not a complete access loss. Logs have this:

    sd 3:0:4:0: [sdf]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
    sd 3:0:4:0: [sdf] CDB: Write(10): 2a 00 00 59 d1 da 00 00 04 00
    end_request: I/O error, dev sdf, sector 5886426
    

Environment

  • Red Hat Enterprise Linux (RHEL) 6,7
  • VMware
  • Virtualization
  • Storage Attached Network (SAN)

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