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Loss of connectivity after disk failure

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Category:
disk-drives
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perf
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Applies to

  • Hardware disk failure
  • Long Consistency Point (CP) errors reported
  • Data outage

Issue

  • Data outage noticed on customer side, for some seconds. Examples:
    • NFS exports disconnected
    • CIFS shares not accessible
    • Missing VMs 
  • Hardware disk failure reported. Example:
[node_name: config_thread: raid.config.filesystem.disk.not.responding:notice]: File system Disk /aggr_name/plex0/rg0/0a.0.1 Shelf 0 Bay 1 [...] is not responding.
[node_name: monitor: monitor.globalStatus.nonCritical:error]: Disk on adapter FPF1939S03T:9, shelf 1, bay 5, not responding.  
  • ONTAP event error for a long CP reported in data and/or root aggregate. Example:

[node_name: wafl_exempt13: wafl.cp.toolong:error]: Aggregate aggr0 experienced a long CP.
[node_name: wafl_exempt16: wafl.cp.toolong:error]: Aggregate aggr_name experienced a long CP.

  • Too long Consistency Point (CP) phase 2 reported in the sktraces AutoSupport section, when flushing data to disks. Example:

2024-1-1T00:01:01Z 12345678912345678    [5:0] CRUISE_6:  CP toolong: aggr0[5678901]     CP_P2_FLUSH          498765ms
2024-1-1T01:01:05Z 23456789123456789    [2:0] CRUISE_6:  CP toolong: aggr_name[5789012] CP_P2_FLUSH          512345ms

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