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NetApp Knowledge Base

E-Series controller reboots for ancient IO during SCSI unmap

Last Updated:

Applies to

  • E-Series Controller Firmware:; 
  • E-Series Platforms: E27XX, E28XX, E55XX, E56XX, E57XX 
  • Configuration: Thin volumes with SCSI Unmap 


A controller reset for ancient IO occurs when doing an unmap operation on thin volumes.  A core capture is triggered by the reset:

Reboot due to ancient IO, scsiOp=0xffff800003784520 poolId=0 opCode=42 age=300023ms 


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