CONTAP-456426：由于 /var 被卸载，节点不稳定
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问题描述
EMS 将报告 I/O 错误，这将导致 /var 文件系统被强制卸载。Mon Jun 01 12:00:00 +0000 [ONTAP0324012943]: mgwd: boot.varfs.forced.umount.issue:error]: I/O error caused forced unmount of the /var file system.