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Host lun IO errors and wafl low memory

Last Updated:

Applies to

  • All Flash arrays
  • FCP
  • iSCSI 
  • SAN
  • ONTAP 9.6


LUNs are online and mapped, but the host experiences I/O errors.

  • Messages from the host:

Mar 16 00:44:13 linux kernel: [2634397.672285] blk_update_request: I/O error, dev sddm, sector 106981280
Mar 16 00:44:13 linux kernel: [2634397.672469] sd 7:0:1:19: [sddm] tag#72 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK


  • EMS events on NetApp:

Mon Mar 16 00:10:11 UTC [NetApp: wafl_exempt02: wafl.memory.statusVeryLowMemory:alert]: WAFL is running very low on memory, with 795MB remaining.


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