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DIMM UECC エラーが原因でノードが自動的にテイクオーバー / ギブバックを実行

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Category:
ontap-9
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HW
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環境

  • ONTAP 9
  • AFFシステム
  • ASAシステム
  • FASシステム

問題

  • Node1でテイクオーバーが発生し、次のアラートが表示され、自動的にギブバックされます:

System Alert from SP of node1 (APPLIANCE_ASUP_DIMM_UECC_ERROR)CRITICAL

  • system logは、UECCがDIMM-Xに対して検出された後にシステムの電源サイクルがトリガーされたことを示します。

ECC error at DIMM-X: CE-01-2246-03EF3FEB,ADDR 0x2a762b080,(Node(0), Memory controller(0), CH(1), DIMM(0), Rank(0), Bank Group(1), Bank(0x1), Row(0x49ca), Col(0x380)), devtag(0x3f), correrr(0x0) Uncorrectable Machine Check Error at CPU9. BDWL_HA0 Error: STATUS<0xbe00000000010091>(Val,UnCor,Enable,MiscV,AddrV,PCC,CorrSts(0),CorrCnt(0),ExtErr(0x1),ErrCode(Channel 1, Read),ErrCode(0x91)),MISC<0x0000000150020286>(HaDbBank(0),PE(0),ReqOpcode(0xa),RNID(0),RTID(0x1),HTID(0x1))
Requesting SP to power cycle the filer to attempt to clear DRAM UECC

  • SP_IPMIログに、DIMMエラーが報告されていることがわかります。

======================================
Log Collection Time: 
======================================
hsamcmd --fault-show-all
===============================
tag  origin  fld                    fault reason                   count  time             
---- ------- ----                   -------------                   ------ -----            
1   0x2    /chassis-1/controller-a/dimm-*     Uncorrectable DRAM ECC              1    
2   0x5    /chassis-1/controller-a          OS is not booted                 1    

Fault Lights On:
       /chassis-1                                        2    
       /chassis-1/controller-a                                  2    
       /chassis-1/controller-a/dimm-*                             1    
/usr/local/bin/ipmi sensors

  • 次のログは sp_system_event_logにあります:

Record697: Sat Jun 22 16:47:56.115990 2024 [IPMI Event.critical]: DIMM UECC Fatal Error detected by Storage OS

Record698: Sat Jun 22 16:47:56.127985 2024 [Trap Event.critical]: hwassistdimm_uecc_error (32)

Record699: Sat Jun 22 16:47:56.164909 2024 [Trap Event.critical]: SNMPdimm_uecc_error (32)

Record700: Sat Jun 22 16:47:56.468211 2024 [IPMI Event.critical]: System power cycle

  • ギブバック後にDIMM-INFO.XMLでDIMM-Xのステータスを確認し、ステータスがOKと表示されていることを確認します。

DIMM ID  Slot Name  Status

  2    DIMM-X    ok

  • DIMM警告LEDのステータスはSP-LATEST-RUNTIMEから確認できます

例:
FRU LEDs status
======================
FRU LED ID 32 = DIMM11 FAULT LED
FRU LED ID 32 is on
 ======================

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