How to extract server information - powershell

Question

Objective: How to extract server information?
For each server name listed in servers.txt, I would like to get the following information (in this format):
Server name, IP Address, OS name, Total Physical Memory, Processors, each drive letter and size, System Model
Comma separated and new line for each server.
Below is my PowerShell code. Can your guys give a hint on why this does not work? Also why I get an error with New-Object statement?
foreach ($ComputerName in (Get-Content -Path .\servers.txt)) {
$HashProps = #{
'tHostname' = Get-WmiObject Win32_Computersystem -ComputerName $ComputerName | Select-Object -ExpandProperty Name
'tIP' = [System.Net.Dns]::GetHostAddresses($computername)
'tOS' = Get-WmiObject -ComputerName $ComputerName -Class Win32_OperatingSystem | Select-Object -ExpandProperty Caption
'tMemory' = Get-WmiObject Win32_PhysicalMemory | Measure-Object -Property capacity -Sum | foreach { "$("{0:n2}" -f ( $_.Sum/1GB ) )" }
'tcpu' = Get-WmiObject Win32_processor | Select-Object name, numberofcores
'tDisks' = Get-WmiObject Win32_LogicalDisk | foreach { "$($_.DeviceID) $("{0:n2}" -f ( $_.Size/ 1GB ) )" }
'tsysmodel' = Get-Wmiobject Win32_computersystem | Select-Object model
}
New-Object -TypeName psObject -Property $HashProps |
ConvertTo-Csv -NoTypeInformation | Out-File -Append .\output.csv
}
I am open for a other approach, if this is easier.

Answer 1

Have you verified that each of those lines actually return what you want?
I just threw this into the ISE and it works fine:
$f = gwmi win32_computersystem | select name,model,totalphysicalmemory
$hash = #{
'name' = $f.name
'model' = $f.model
'memory' = $("{0:n2}" -f ( $f.totalphysicalmemory/1GB ) )
}
New-Object -TypeName psobject -Property $hash | ConvertTo-Csv -NoTypeInformation | Out-File -Append .\test.csv
Also, if you want the properties to appear in a specific order in the CSV, it will take some additional magic, otherwise they're put in alphabetically.

Answer 2

A little bit pimped, maybe this will help you:
$Servers = Foreach ($ComputerName in (Get-Content -Path .\Servers.txt)) {
$CS = Get-WmiObject Win32_ComputerSystem -ComputerName $ComputerName
$OS = Get-WmiObject Win32_OperatingSystem -ComputerName $ComputerName
$PM = Get-WmiObject Win32_PhysicalMemory -ComputerName $ComputerName
$PR = Get-WmiObject Win32_processor -ComputerName $ComputerName
$LD = Get-WmiObject Win32_LogicalDisk -ComputerName $ComputerName
$IP = [System.Net.Dns]::GetHostAddresses($ComputerName)
[PSCustomObject]#{
ServerName = $CS | Select-Object -ExpandProperty Name
IPAddress = $IP | Select-Object -ExpandProperty IPAddressToString
OS = $OS | Select-Object -ExpandProperty Caption
Memory = $PM | Measure-Object -Property Capacity -Sum | foreach { "$("{0:n2}" -f ( $_.Sum/1GB ) )" }
CPU = $PR | Select-Object Name, NumberOfCores
Disks = $LD | foreach { "$($_.DeviceID) $("{0:n2}" -f ( $_.Size/ 1GB ) )" }
Model = $CS | Select-Object -ExpandProperty Model
}
}
$File = Join-Path $env:TEMP 'Ouptut.csv'
$Servers | Export-Csv -Path $File -NoTypeInformation -Delimiter ';'
Start-Process $File