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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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适用场景

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

问题描述

如果存储控制器主板更换和机头升级执行不当、可能会导致控制器的SAN标识信息丢失、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 5G和Data ONTAP 7-模式可将SAN标识和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升级机头期间、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、则会自动更改LUN序列号。唯一的例外是Data ONTAP确定已更换主板。如果确定连接到存储控制器的所有聚合都来自另一个存储控制器、则会检测到主板更换。如果将外部聚合添加到包含现有聚合和自有磁盘的存储控制器、则主板更换检测将失败、并且外部聚合上FlexVol中的任何LUN都将收到新的序列号。

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