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如何使用iSCSI和FCP解决存储控制器主板更换和机头升级期间的问题

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flexpod-with-infrastructure-automation
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适用场景

  • SAN
  • FlexPod
  • Data ONTAP 7 及更早版本

问题描述

如果更换存储控制器主板和升级机头的操作不正确、则可能会导致控制器的SAN身份信息丢失、包括光纤通道WWN、WWPN和iSCSI IQN。此外、还可能导致更改现有LUN序列号或丢失LUN到启动程序组的映射。
Data ONTAP 7G和Data ONTAP 7-模式会将SAN身份和LUN映射数据存储在控制器的根卷中。因此、在更换存储控制器主板或机头升级期间、必须保留根卷和聚合。  

如果将聚合卷从一个存储控制器重新分配到另一个存储控制器、则LUN序列号将自动更改。唯一的例外是、当Data ONTAP 确定发生了主板更换时。如果确定连接到存储控制器的所有聚合均来自另一个存储控制器、则会发生主板更换检测。如果将外部聚合添加到具有现有聚合和自有磁盘的存储控制器中、则主板更换检测将失败、而外部聚合上FlexVol中的任何LUN将收到新的序列号。

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