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Cohesity backup server seeing latency to the FCP LUNs in ONTAP

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Category:
ontap-9
Specialty:
san
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Applies to

  • Cohesity
  • ONTAP 9
  • SAN FCP

Issue

  • Cohesity hosts unable to complete backups due to latency
  • Storage HBA sees Aborts(ext_status 0x16) and hung commands for writes(state=5) for multiple S_ID

[cntap-04: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:2a IO WQE failure, Handle 0x0, Type 8, S_ID: 11E02, VPI: 3, OX_ID: 2C0, Status 0x3 Ext_Status 0x16

[cntap-04: fct_tpd_thread_0: fcp.io.status:debug]: STIO Adapter:2a, found hung cmd:0xfffff82cd0961b00(state=5, flags=0x0, ctio_sent=1/1,RecvExAddr=0x7eb, OX_ID=0x127, RX_ID=0xffff,SID=0x11e02, Cmd[8A], req_q_free:0)

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