您好,
您可以在重装系统之前备份ISCSI的数据。
请通过以下链接去了解该步骤的详细操作:
管理虚拟磁盘的备份和恢复
https://technet.microsoft.com/zh-cn/library/gg232603(v=ws.10).aspx
诚挚敬意
John
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