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Files missing from data stores connected to NFS volumes

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Category:
ontap-9
Specialty:
hw
Last Updated:

Applies to

  • ONTAP 9
  • VM datastores through NFS
  • FAS 8200

Issue

  • Files are missing from multiple datastores distributed across multiple volumes in aggregate
  • The volumes involved in the incident do not show file system degradation
  • The aggregate containing the affected volumes does not show physical degradation or RAID issues
  • PHY Count is observed at 2069
  • Storage paths are working correctly (Multi-Path HA present)
  • SAS topology is compliant with platform specifications and capabilitiesConfiguration is within Hardware Universe parameters for platform, disks, shelves and cabling
  • No shelf faults are observed involving the affected aggregate and volumes
  • Volume clone from snapshot does not contain the missing data
  • Snapshot spill and volume available size changes can be observed due to a major change in data:
                                Jan 8th          Jan 4th
                                  Value            Value
Volume Size             109951162777600  109951162777600
Available Size           52895028441088   48346668806144
Used Size                51558576197632   56106935832576
Used Percentage                     49%              53%
Snapshot Reserve Used              479%               3%

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