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Volume Path Errors Triggered by Link Flaps

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e-series-santricity-os-controller-software
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esg
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Applies to

  • E-Series
  •  Fibre channel

Issue

Volumes intermittently report path errors and are not on their preferred paths. Volume transfers are triggered unexpectedly due to link flaps. This results in I/O shipping and VNOPP (Volume Not On Preferred Path) errors.
SANtricity major event log shows repeated occurrences of link flaps shortly before I/O shipping events:
A:5/20/25, 2:22:01 PM (14:22:01) 77462 210a Controller cache not enabled or was internally disabled - Shelf 99, Bay A - Event: Cache Reconfigure Sync-54
B:5/20/25, 2:22:02 PM (14:22:02) 77461 2044 IO shipping implicit volume transfer - Volume Volumename - Shipped/Owned IOs: 92/4, Host ID: 38
B:5/20/25, 2:22:02 PM (14:22:02) 77460 212c Write-back caching fully restored - Shelf 99, Bay B
B:5/20/25, 2:22:02 PM (14:22:02) 77459 210a Controller cache not enabled or was internally disabled - Shelf 99, Bay B - Event: Give Volume Ownership-54
A:5/20/25, 2:17:14 PM (14:17:14) 77458 1018 Fibre channel link up - Host-side: controller in bay A, port 6
A:5/20/25, 2:17:14 PM (14:17:14) 77457 1017 Fibre channel link down - Host-side: controller in bay A, port 6

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