根据Technet 论坛中的这个答案,您可以计算磁盘上的大小,如下所示:
$afz = [MidpointRounding]::AwayFromZero
[math]::Round($_.Length / $clusterSize + 0.5, $afz) * $clusterSize
$clusterSize
可以通过fsutil
命令确定(例如对于 drive C:
):
PS C:\> fsutil fsinfo ntfsinfo C:\
NTFS Volume Serial Number : 0x648ac3ae16817308
Version : 3.1
Number Sectors : 0x00000000027ccfff
Total Clusters : 0x00000000004f99ff
Free Clusters : 0x0000000000158776
Total Reserved : 0x00000000000003e0
Bytes Per Sector : 512
Bytes Per Physical Sector : 512
Bytes Per Cluster : 4096
Bytes Per FileRecord Segment : 1024
Clusters Per FileRecord Segment : 0
...
请注意,运行fsutil
需要管理员权限。
有了它,您可以像这样收集您感兴趣的信息:
$rootDir = "C:\test"
$afz = [MidpointRounding]::AwayFromZero
$clusterSize = fsutil fsinfo ntfsinfo (Get-Item $rootDir).PSDrive.Root `
| Select-String 'Bytes Per Cluster' `
| % { $_.ToString().Split(':')[1].Trim() }
$stat = Get-ChildItem $rootDir -Recurse -Force `
| select Name, Length, @{n="PhysicalSize";e={
[math]::Round($_.Length / $clusterSize + 0.5, $afz) * $clusterSize
}}, @{n="Folder";e={[int]($_.PSIsContainer)}},
@{n="File";e={[int](-not $_.PSIsContainer)}} `
| Measure-Object -Sum Length, PhysicalSize, Folder, File
$folder = New-Object -TypeName PSObject -Property @{
"FullName" = $rootDir;
"Files" = ($stat | ? { $_.Property -eq "File" }).Sum;
"Folders" = ($stat | ? { $_.Property -eq "Folder" }).Sum;
"Size" = ($stat | ? { $_.Property -eq "Length" }).Sum;
"SizeOnDisk" = ($stat | ? { $_.Property -eq "PhysicalSize" }).Sum - $clusterSize;
}