Dell EMC Unity: Error Code "flr::check_server_connectivity_2" during Pre-Upgrade Health Checks (User Correctable)

 

Dell EMC Storage Unity 장비의 펌웨어 업그레이드 진행시 헬스체크를 진행 하게 됩니다.

SAN or DAS or NAS 로 모든 PATH 에 대해 이중화 연결을 권장 권고 하는데요.

펌웨어 업그레이드  진행 시 서비스 무중단으로 각 SP (컨트롤러) 를 번갈아 리부팅이 진행 되고 있습니다.

 

특정 서버 호스트의 PATH 가 하나의 컨트롤러에 연결 되어 있으니 업그레이드를 진행 하려면 해당 패스를 

이중화로 연결 하거나 호스트가 끊어질거를 알고 있어라 라고 해석 하시면 됩니다.

 

HBA FC Port or Ethernet Port or NAS FC Port 에 대해 각 컨트롤러 케이블 연결

 ( 단일 라인으로 연결 되었기 때문에 경고 오류 메세지 발생 )

 

해결

• Unisphere에서 다음 설정을 탐색하여 호스트 연결을 확인: "액세스" -> "호스트."
• 상태 페이지를 확인하고 호스트 케이블이 두 SP의 해당 이더넷 포트에 연결되어 있는지 확인.
• 호스트 X는 두 SP의 동일한 포트에 연결됩니다.

모든 호스트가 두 SP에 중복 연결이 있는 경우 이 상태 검사는 더 이상 트리거되지 않습니다.

 

 

만약 단일 라인임을 알고 있거나 서버 패스 끊김을 인지 하셨다면 강제로 진행 하셔도 됩니다.

 

 

 

----------- Dell CASE 본문 --------------

Article Number: 000052357

 

Dell EMC Unity: Error Code "flr::check_server_connectivity_2" during Pre-Upgrade Health Checks (User Correctable)

Summary: The health check process has determined that one or more servers do not have redundant communication paths. This error is raised to allow customers to take action to prevent data unavailable or data loss condition during a Service Processor reboot or failover.

Unable to Upgrade a Unity system due to a problem with host connectivity. Pre-Upgrade Health Check failed with error code: "flr::check_server_connectivity_2"

"The health check has failed. If an SP has to fail over, one or more of your servers do not have redundant communication paths and could cause data unavailable or data loss errors. Record the error code and search the EMC Online Support website for available support options."

One or more hosts do not have connections to both SPs. This could result in data loss or unavailability during an upgrade.

Cause

Before an upgrade on a Unity array there are advanced health checks that take place to ensure that the system upgrade runs smoothly.

Note:

• A Unity upgrade requires the Storage Processors (SP) to be rebooted, however each SP is rebooted separately.
• This is to prevent any disruption of I/O to Hosts.
• A host must be connected to the correct ports on both SPs because each SP will be rebooted during the upgrade.

Attached hosts must have connections to both SPA and SPB. If a host has a hardware problem or is only connected to one of the two SPs (which is against Dell EMC best practices), the following message is posted when an upgrade is initiated: "flr::check_server_connectivity_2".

This message means that if you attempt to proceed with the upgrade with the Unity array in this current state, at least one (or more) of your hosts lose access to the storage array, resulting in servers failing.
This safeguard within the Unity OE code is designed to help protect your environment.

Resolution

In order to resolve this problem: 

• Investigate the host connectivity by browsing the following setting within Unisphere: "Access" -> "Hosts."
• Check the Health page and ensure that cables to hosts are connected to the corresponding Ethernet ports on both SPs.
  • Host X is connected to the same Ethernet port on both SPs.

When all hosts have redundant connections to both SPs this health check will not be triggered anymore.

It is not recommended to get this preupgrade health check skipped due to the risks involved.

 

 

 

Article Properties

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Affected Product

Dell EMC Unity Family

Product

Dell Unity 300, Dell EMC Unity 300F, Dell EMC Unity 400, Dell EMC Unity 400F, Dell EMC Unity 500, Dell EMC Unity 500F, Dell EMC Unity 600, Dell EMC Unity 600F, Unity All Flash, Dell EMC Unity Family |Dell EMC Unity All Flash, Dell EMC Unity Family , Dell EMC Unity Hybrid, Unity Hybrid flash, UnityVSA, Dell EMC UnityVSA Professional Edition/Unity Cloud Edition View Less

Last Published Date

15 Dec 2022

Version

4

Article Type

Solution