更换E系列控制器后、某些主机上的iSCSI连接丢失

最后更新
另存为PDF

Knowledge Base guidance

This article may include metadata, visibility, validation state, and related support guidance.

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>