Frequent failure of multipath causing readonly filesystem

Solution Verified - Updated -

Issue

  • Multipath fails frequently causing filesystems to be mounted read-only. Error messages in /var/log/messages as below.

    end_request: I/O error, dev sdbm, sector 4192702  
    end_request: I/O error, dev sdbm, sector 4192708  
    device-mapper: dm-multipath: Failing path 68:0.
    

Environment

  • Red Hat Enterprise Linux Server  5.3
  • device-mapper-multipath-0.4.7-23.el5-x86_64
  • HP blades (model Proliant BL460c G1)
  • HDS AMS1000 storage system

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