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pvscan
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===
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扫描系统中所有硬盘的物理卷列表
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## 补充说明
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**pvscan命令** 会扫描系统中连接的所有硬盘，列出找到的物理卷列表。使用pvscan命令的`-n`选项可以显示硬盘中的不属于任何卷组的物理卷，这些物理卷是未被使用的。
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### 语法
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```
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pvscan(选项)
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```
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### 选项
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```
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-d：调试模式；
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-e：仅显示属于输出卷组的物理卷；
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-n：仅显示不属于任何卷组的物理卷；
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-s：短格式输出；
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-u：显示UUID。
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```
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### 实例
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使用pvscan命令扫描当前系统中所有硬盘的物理卷，在命令行中输入下面的命令：
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```
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[root@localhost ~]# pvscan #扫描所有硬盘上的物理卷
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```
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输出信息如下：
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```
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PV /dev/sdb1 lvm2 [101.94 MB]
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PV /dev/sdb2 lvm2 [101.98 MB]
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Total: 2 [203.92 MB] / in use: 0 [0 ] / in no VG: 2 [203.92
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MB]
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```
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说明：本例中，输出了两个物理卷，它们不属于任何卷组，是可被利用的物理卷。
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<!-- Linux命令行搜索引擎：https://jaywcjlove.github.io/linux-command/ -->
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