Problem extracting values from parameter...

Question

Evening all,
I am struggling to extract the values for particular columns within a foreach loop, the code is as follows:
$Processor = Get-WmiObject -Class Win32_PerfFormattedData_PerfDisk_LogicalDisk | where {$_.name -like '*:*'} | Format-Table -AutoSize -Property Name , DiskReadBytesPersec, DiskWriteBytesPersec , FreeMegabytes , PercentFreeSpace
foreach($row in $Processor)
$Name = $row.Name
$Reads = $row.DiskReadBytesPersec
$Writes = $row.DiskWriteBytesPersec
$FreeMB = $row.FreeMegabytes
$FreeSpace = $row.PercentFreeSpace
When returning the value of the parameter, all the correct values are there with the correct column headers. This is probably something simple enough to resolve but no matter how I format it, I can't get it to work. A quick pointer in the right direction
would be really helpful.
Cheers

Answer 1

Hi Ghostface,
this is due to your use of Format-Table. Format functions convert objects into something that the console can easily display to your screen, but datawise it's pretty much a dead end. Replace "Format-Table -AutoSize -Property" with "Select"
and you should be fine (And not need your loop either).
Cheers,
Fred
Ps.: You can rename properties with Select too. Compare these two lines:
Get-WmiObject -Class Win32_PerfFormattedData_PerfDisk_LogicalDisk | where {$_.name -like '*:*'} | Select Name, DiskReadBytesPersec
Get-WmiObject -Class Win32_PerfFormattedData_PerfDisk_LogicalDisk | where {$_.name -like '*:*'} | Select Name, @{ n = "RBPSec" ; e = { $_.DiskReadBytesPersec }}
PPs: Some more Select magic: Combined and calculated Values:
Get-WmiObject -Class Win32_PerfFormattedData_PerfDisk_LogicalDisk | where {$_.name -like '*:*'} | Select Name, DiskReadBytesPersec, DiskWriteBytesPersec, @{ n = "RWRatio"; e = {$_.DiskReadBytesPersec / $_.DiskWriteBytesPersec}}, FreeMegabytes, PercentFreeSpace, @{ n = "UsedMegabytes"; e = {$_.FreeMegabytes / $_.PercentFreeSpace * (100 - $_.PercentFreeSpace)}}
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