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Simplex E-Series Controller replacement asserts multiple times to OE LU

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Applies to

  • SG57xx
  • Simplex E28xx
  • NetApp SANtricity OS 11.50.30.00+

Issue

  • When replacing a controller in a simplex set up, the controller will reboot multiple times when attempting Auto Code Synchronization (ACS) from the drives with the following assertion and end in the 7 segment code OE LU.
  • Original controller is running at least 11.50.30.xx
  • New controller is running older than 11.50.20.xx
  • The following entry is seen multiple times in the excLogShow command

excLogShow

---- Log Entry #0 (Core 0) Jul-17-2021 10:20:41 AM ----

07/17/21-10:20:41 (tRAID): ASSERT: Assertion failed: false, file vdmExopExclOpAgentState.cc, line 59

2021-07-17T10:20:44.903055

Unable to determine panic string.

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