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更换E系列控制器后、某些主机上的iSCSI连接丢失

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适用场景

  • E 系列
  • SANtricity操作系统
  • Linux DM-MP (设备映射程序多路径)
  • 已执行控制器更换

问题描述

  • 更换E系列控制器后、某些主机的iSCSI连接松动
  • Recovery Guru and MAJOR-EVENT-LOG (MEL)报告以下错误:
    • Loss of host-side connection redundancy detected
    • Volume not on preferred path due to AVT/RDAC failover
    • ALB_HOST_REDUNDANCY_LOST
    • NON_PREFERRED_PATH
  • 重新分布卷可临时解决这些错误、但几分钟后会再次检测到这些错误
  • 除了更换控制器之外、不会在控制器和主机上执行任何配置更改
  • STATE-CAPTURE-DATA > spmShow 表示更换后的控制器没有从配对控制器的某些主机建立iSCSI连接

更换控制器A后的示例:

Executing spmShow(0,0,0,0,0,0,0,0,0,0) on controller A:

---I-T-Nexus (PORT) Objects (ITN)---
ITNID InitiatorPort          TargetPort            Online
----- ------------------------------ ------------------------------ ------
x0005 Host_0000000000000003      iSCSI_TargetPortPR_Ah_ch7    on   <IQN>:<HOST1>
x0006 Host_0000000000000004      iSCSI_TargetPortPR_Ah_ch8    on   <IQN>:<HOST1>


Executing spmShow(0,0,0,0,0,0,0,0,0,0) on controller B:

---I-T-Nexus (PORT) Objects (ITN)---
ITNID InitiatorPort          TargetPort            Online
----- ------------------------------ ------------------------------ ------
x0005 Host_0000000100000004      iSCSI_TargetPortPR_Bh_ch8    off   <IQN>:<HOST1>
x0006 Host_0000000100000002      iSCSI_TargetPortPR_Bh_ch8    on   <IQN>:<HOST1>
x0007 Host_0000000100000002      iSCSI_TargetPortPR_Bh_ch8    on   <IQN>:<HOST1>
x0008 Host_0000000100000020      iSCSI_TargetPortPR_Bh_ch8    off   <IQN>:<HOST2>
x0009 Host_0000000100000001      iSCSI_TargetPortPR_Bh_ch7    on   <IQN>:<HOST2>
x000a Host_000000010000001f      iSCSI_TargetPortPR_Bh_ch7    off   <IQN>:<HOST1>
x000b Host_0000000100000002      iSCSI_TargetPortPR_Bh_ch8    off   <IQN>:<HOST2>
x000c Host_0000000100000001      iSCSI_TargetPortPR_Bh_ch7    on   <IQN>:<HOST2>
x000d Host_0000000100000002      iSCSI_TargetPortPR_Bh_ch8    on   <IQN>:<HOST3>
x000e Host_0000000100000002      iSCSI_TargetPortPR_Bh_ch8    on   <IQN>:<HOST3>

 

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