Data Domain : File System (DDFS) is disabled due to a critical condition on platform

Data Domain : File System (DDFS) is disabled due to a critical condition on platform

Data Domain _ File System (DDFS) is disabled due to a critical condition on platform _ Dell Korea, Republic of.pdf

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Summary: This KB describe behaviour of DDFS disabled due to platform critical condition.

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Symptoms

When Data Domain platform detects a critical condition, a safeguard will disable the file system (DDFS) as a precaution.

• Event posted: p0-12 EVT-ENVIRONMENT-00052: File system is disabled due to a critical condition.EVT-OBJ::Enclosure=1 EVT-INFO::Cause=XXXXX

Some of the typical causes of such critical conditions on platform are namely :

• Alert: EVT-ENVIRONMENT-00032: The storage processor has failed
• Alert: EVT-ENVIRONMENT-00036: The current temperature exceeds the warning threshold
• System time backwards jump

Cause

It is by design that DDFS be automatically disabled when system platform detects any of a set of critical conditions.

In the DD, the "messages.engineering" log (which can be viewed through "log view debug/messages.engineering" from the CLI) indicates "platmon" process disables the DDFS due to the fatal error in platform, for example :
 

May 11 20:55:46 dd01 cpe: DEBUG: epe_process_event: Received event: PS_ENVIRONMENT_00032 May 11 20:55:46 dd01 cpe: NOTICE: evaluate_symbol_node: taking action(s) on system_unstable(TRUE) May 11 20:55:46 dd01 cpe: NOTICE: post_event: Publishing pubsub event PS_HA_SYSTEM_STATUS May 11 20:55:46 dd01 platmon: INFO: Added indict SP May 11 20:55:46 dd01 platmon: INFO: STAT AddPersistentIndictment INFO: SP May 11 20:55:46 dd01 platmon: ERROR: Fatal error in platform monitor, DDFS shall be disabled

Resolution

Note there is a particular such platform error which is explained in more detail in a separate KB article :
Data Domain: The Data Domain File System (DDFS) may be disabled if there is a backwards jump in system time configured on the system

For other possible reasons for the platform errors and the DDFS process being disabled as a result, please read on, and contact DELL DataDomain Support as needed.

1. Firstly step should be taken to check the cause of the platform critical error and fix it. Check the mentioned "messages.engineering" log and list the system alerts (alerts show current) for any details.

2. After the platform error is fixed, clear the active EVT-ENVIRONMENT-00052 alert and also clear the "indict" as explained below :

# system show serialno # priv set se ---- Input serial number as password. # alerts show current # alerts clear alert-id <alert-id-list> # se indict list # se indict remove <id>

3. Finally, enable file system again:

# filesys enable

 

전산실 에어컨 및 항온 항습기가 문제가 발생하여, 온도 상승으로 인해 Data Domain이 강제 종료 되어 부팅 하였을때 

해당 메시지와 함께 Filesystem 비활성화 상태 해결

1. 에어컨 및 항온 항습기를 정상정인 상태로 만들어 전산실 환경을 정상적인 상태로 변경

2. 문서를 참고하여 해당 문제 Clear

3. 재부팅 하여 해당 문제 해결

DD6400에서 해당 문제가 발생하여 해결함

(개인 knowledge 저장용)