Update content/zh/docs/concepts/storage/volume-pvc-datasource.md

Author: ydcool

content/zh/docs/concepts/storage/volume-pvc-datasource.md

@@ -19,7 +19,6 @@ weight: 30
 
 {{% capture overview %}}
 
-{{< feature-state for_k8s_version="v1.16" state="beta" >}}
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 This document describes the concept of cloning existing CSI Volumes in Kubernetes.  Familiarity with [Volumes](/docs/concepts/storage/volumes) is suggested.
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@@ -50,10 +49,10 @@ A Clone is defined as a duplicate of an existing Kubernetes Volume that can be c
 克隆，意思是为已有的 Kubernetes 卷创建副本，它可以像任何其它标准卷一样被使用。唯一的区别就是配置后，后端设备将创建指定完全相同的副本，而不是创建一个“新的”空卷。
 
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-The implementation of cloning, from the perspective of the Kubernetes API simply adds the ability to specify an existing unbound PVC as a dataSource during new pvc creation.
+The implementation of cloning, from the perspective of the Kubernetes API, simply adds the ability to specify an existing PVC as a dataSource during new PVC creation. The source PVC must be bound and available (not in use).
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-从 Kubernetes API 的角度看，克隆的实现只是在创建新的 PVC 时，增加了指定一个现有未绑定 PVC 作为数据源的能力。
+从 Kubernetes API 的角度看，克隆的实现只是在创建新的 PVC 时，增加了指定一个现有 PVC 作为数据源的能力。源 PVC 必须是 bound 状态且可用的（不在使用中）。
 
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 Users need to be aware of the following when using this feature:
@@ -69,6 +68,7 @@ Users need to be aware of the following when using this feature:
 * Cloning is only supported within the same Storage Class.
     - Destination volume must be the same storage class as the source
     - Default storage class can be used and storageClassName omitted in the spec
+* Cloning can only be performed between two volumes that use the same VolumeMode setting (if you request a block mode volume, the source MUST also be block mode)
 -->
 
 * 克隆支持（`VolumePVCDataSource`）仅适用于 CSI 驱动。
@@ -78,6 +78,7 @@ Users need to be aware of the following when using this feature:
 * 仅在同一存储类中支持克隆。
     - 目标卷必须和源卷具有相同的存储类
     - 可以使用默认的存储类并且 storageClassName 字段在规格中忽略了
+* 克隆只能在两个使用相同 VolumeMode 设置的卷中进行（如果请求克隆一个块存储模式的卷，源卷必须也是块存储模式）。
 
 
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