Filesystem on VMware Red Hat Enterprise Linux 4, 5, 6, & 7 guests went read-only

Solution Verified - Updated -

Issue

  • File systems became read-only on virtual guests on VMware.
  • The read-only filesystem was caused by temporary disconnections to SAN disks, VM crashed. how can we avoid it?
  • Read-only filesystem is occurring fairly regularly.
  • Root file system went to read only mode in RHEL 4 VM running on VMware and server got panic. Need to reboot the server to overcome the situation, how can we avoid this behavior?
  • Filesystem went to ready only mode, we had following SCSI I/O error events logged in syslog messages:

    kernel: sd 0:0:0:0: timing out command, waited 1080s
    kernel: sd 0:0:0:0: Unhandled error code
    kernel: sd 0:0:0:0: SCSI error: return code = 0x06000008
    kernel: Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT,SUGGEST_OK
    
  • Red Hat Enterprise Linux VMware ESX Guests located on SAN going Read-Only,

Environment

  • Red Hat Enterprise Linux(RHEL) 4, 5, 6, 7 virtual guest in VMware environment
  • VMware ESX/ESXi hypervisor environment

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