How to get I/O read and write bytes for process or drive with PowerShell

Question

Would like to view:

• For a process, how many bytes are read and written to drive(s).
• For a drive (D:, E:, etc.), same thing, how many bytes are read and written to on a period of time (all processes). Start counting at specific time and end at specific time, and display values in-between.

The Windows 10 Task Manager (C:\Windows\System32\Taskmgr.exe) has the ability, on Details tab, to display "I/O read bytes" and "I/O write bytes" for each process. Would like to get this information on a terminal to save directly those values to text files.
Maybe I need some additional software besides PowerShell.

Answer 1

Hi,

You can use the Win32_Process WMI class to get them.

Get-WmiObject -Class Win32_Process -Filter {Name = 'MyProcess.exe'}| Select-Object Name,ReadTransferCount,WriteTransferCount  

Best Regards,
Ian Xue

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Answer 2

How to I get the bytes read and written for MyProcess.exe? Not per second, total, since the program has started. Like Task Manager shows.

Answer 3

You'll have to get that information from performance monitor (just as TaskMgr does). Use the Get-Counter cmdlet for that.

Answer 4

Any specific command please?

Answer 5

Specific command? Get-Counter. Look for that cmdlet name in a search engine. You'll find numerous examples.

An example:

$gc = get-counter '\Process(*)\IO Read Bytes/sec'
$gc | Sort-Object cookedvalue

$gc.gettype()


IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     False    PerformanceCounterSampleSet              System.Object

$gc.CounterSamples[0]


Path                                   InstanceName CookedValue
----                                   ------------ -----------
\\ws06\process(idle)\io read bytes/sec idle                   0