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シャーシ内の複数のブレードでFCPターゲットおよびパスが失われた場合

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ontap-9
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san<a>2009400056</a>
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環境

  • ONTAP 9
  • HPE Synergy
  • Brocade Fabric OS 9.1
  • VMware ESXi

問題

  • さまざまなESXiホスト(HPE Synergyシャーシ内のブレード)での散発的および断続的なパスおよびターゲットの喪失
  • ONTAP は、関連するイニシエータがログインされていないことを確認影響を受けるイニシエータとLIFは数分ごとに変更される可能性があり

::*> fcp ping-igroup show -vserver SVM -igroup * -ext-status wwpn-not-logged_in
  (vserver fcp ping-igroup show)
      Igroup            Logical   Node    Ping    Extended
Vserver   Name     WWPN       Interface  Name    Status   Status
--------- ----------- -------------- ---------- --------- -------- -----------
SVM
      SYNERGYESXGRP1 20:00:xx:xx:xx:xx:xx:29 SVM_fc07 NODEA12 reachable wwpn-not-logged_in
      SYNERGYESXGRP2 20:00:xx:xx:xx:xx:xx:09 SVM_fc07 NODEA12 reachable wwpn-not-logged_in
      SYNERGYESXGRP4 20:00:xx:xx:xx:xx:xx:01 SVM_fc02 NODEA11 reachable wwpn-not-logged_in
      SYNERGYESXGRP4 20:00:xx:xx:xx:xx:xx:01 SVM_fc04 NODEA12 reachable wwpn-not-logged_in
      SYNERGYESXGRP7 20:00:xx:xx:xx:xx:xx:31 SVM_fc02 NODEA11 reachable wwpn-not-logged_in
      SYNERGYESXGRP8 20:00:xx:xx:xx:xx:xx:31 SVM_fc04 NODEA12 reachable wwpn-not-logged_in

  • イニシエータはログイン済みと確認されることもありますが、関連するホストではターゲットに到達できず、稼働していないパスもあります
  • EMS/ Ext_Status 0x16のエラーを含むWQE event log show

fcp.io.status: STIO Adapter:2a IO WQE failure, Handle 0x5, Type 8, S_ID: 10902, VPI: 259, OX_ID: 24C, Status 0x3 Ext_Status 0x16

  • command termination hungSRAMダンプによるFCホストバスターゲットアダプタのリセット(通常は複数のストレージコントローラに接続されているとは限りません)

::> event log show -severity debug -event *fcp.io.status*hung*|*SRAM*
Time         Node        Severity    Event
------------------- ---------------- ------------- ---------------------------
12/21/2022 12:44:48 NODEA12      DEBUG      scsitarget.fcp.dump: FCP target SRAM dump generated for adapter 2a, fct_tpd_check_hung_commands: Command termination hung. cmd:0xfffff80917a41c60 (state=0xa, flags=0x2,ctio_sent=2/2, RecvExAddr=0x1aec, OX_ID=0x72, RX_ID=0xffff, SID=0x10902)
12/21/2022 12:44:48 NODEA12      DEBUG     fcp.io.status: STIO Adapter:2a, found hung cmd:0xfffff80917a41c60(state=10, flags=0x2, ctio_sent=2/2,RecvExAddr=0x1aec, OX_ID=0x72, RX_ID=0xffff,SID=0x10902, Cmd[28], req_q_free:0)
12/21/2022 11:56:38 NODEA12      DEBUG      fcp.io.status: STIO Adapter:1a, found hung cmd:0xfffff8090d1a4010(state=5, flags=0x0, ctio_sent=1/1,RecvExAddr=0x14ef, OX_ID=0x264, RX_ID=0xffff,SID=0x10902, Cmd[2A], req_q_free:0)
12/21/2022 11:55:51 NODEA11      DEBUG      scsitarget.fcp.dump: FCP target SRAM dump generated for adapter 2a, fct_tpd_check_hung_commands: Command termination hung. cmd:0xfffff80917b392f8 (state=0xa, flags=0x2,ctio_sent=2/3, RecvExAddr=0x146e, OX_ID=0x178, RX_ID=0xffff, SID=0x10c03)
12/21/2022 11:55:46 NODEA11      DEBUG      fcp.io.status: STIO Adapter:2a, found hung cmd:0xfffff80917b392f8(state=7, flags=0x0, ctio_sent=1/2,RecvExAddr=0x146e, OX_ID=0x178, RX_ID=0xffff,SID=0x10c03, Cmd[8A], req_q_free:0)
5 entries were displayed.

  • Brocadeスイッチで c3timeoutは、ホストポートのTXを増やし、ストレージポートのRXを増やすと、エンドデバイスが輻輳していることがわかります
  1. 実行 statsclear
  2. 15分待ちます
  3. 実行 porterrshow 

FID128:admin> porterrshow 8-13
      frames     enc    crc    crc    too    too    bad    enc   disc   link   loss   loss   frjt   fbsy   c3timeout   pcs    uncor
     tx     rx    in    err    g_eof   shrt   long   eof    out   c3    fail   sync   sig            tx   rx    err    err
  8:   4.8m   8.4m   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
  9:   1.1k   1.1k   0     0     0     0     0     0     0    717     0     0     0     0     0   717    0     0     0
  10:   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
  11:   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
  12:   3.9m   6.8m   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
  13:  976     1.2k   0     0     0     0     0     0     0    840     0     0     0     0     0   840    0     0     0
FID128:admin> porterrshow 20-23
      frames     enc    crc    crc    too    too    bad    enc   disc   link   loss   loss   frjt   fbsy   c3timeout   pcs    uncor
     tx     rx    in    err    g_eof   shrt   long   eof    out   c3    fail   sync   sig            tx    rx   err    err
  20:   6.7m   7.6m   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0
  21:   3.9m   2.5m   0     0     0     0     0     0     0    518     0     0     0     0     0     0   259    0     0
  22:   3.9m   2.5m   0     0     0     0     0     0     0    974     0     0     0     0     0     0   487    0     0
  23:   6.4m   3.0m   0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0

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