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标题: [转载代码] [PowerShell每日技巧]硬盘空间GB和使用率(20140314) [打印本页]

作者: DAIC 时间: 2014-3-14 22:21 标题: [PowerShell每日技巧]硬盘空间GB和使用率(20140314)

When a cmdlet returns raw data, you may want to convert the data into a better format. For example, WMI can report the free space of a drive but reports bytes.

You can then use Select-Object and provide hash tables to take the raw data and convert it to anything you want. This sample illustrates how to convert Freespace into GB and also calculate the percentage of free space:

$Freespace =
@{
  Expression = {[int]($_.Freespace/1GB)}
  Name = 'Free Space (GB)'
}

$PercentFree =
@{
  Expression = {[int]($_.Freespace*100/$_.Size)}
  Name = 'Free (%)'
}

Get-WmiObject -Class Win32_LogicalDisk | Select-Object -Property DeviceID, VolumeName, $Freespace, $PercentFree
复制代码

Here is the result without hash tables:

PS C:\> Get-WmiObject -Class Win32_LogicalDisk | Select-Object -Property DeviceID, VolumeName, Freespace

DeviceID                         VolumeName                                           Freespace
--------                         ----------                                           ---------
C:                               BatHome                                              114592428032

And this is the result using hash tables:

PS C:\> Get-WmiObject -Class Win32_LogicalDisk | Select-Object -Property DeviceID, VolumeName, $Freespace, $PercentFree

DeviceID                VolumeName                      Free Space (GB)                Free (%)
--------                ----------                      ---------------                --------
C:                      BatHome                                     107                      45

http://powershell.com/cs/blogs/tips/archive/2014/03/14/drive-data-in-gb-and-percent.aspx

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