# wmi-chkdsk.ps1
# Runs chkdsk to checks a local hard disk.
# Script just checks C:\
# thomas lee - tfl@psp.co.uk

# Helper function to Decode Return Code

function Get-DfragReturn {
param ([uint16] $char)

# parse and return values

If ($char -ge 0 -and $char -le 5) {

  switch ($char) {
  0  {"00-Success"}
  1     {"01-sUCCESS (volume locked and chkdsk scheduled for reboot"}
  2  {"02-unsupported file system"}
  3  {"03-Unknown file system"}
  4  {"04-No Media in drive"}
  5  {"05-Unknown Error"}
  }
}

Else {
 "{0} - *Invalid Result Code*" -f $char}
 Return
}

  
# Get all local disks
# then get first drive (C:\)
$disks=gwmi win32_Volume
$c=$disks | where {$_.name -eq "C:\"}

# print start
"Checking {0} on system: {1}" -f $c.name,$c.SystemName

# Now specify chkdsk paramaters and call chkdsk

$FixErrors          = $false    # does not fix errors 
$VigorousIndexCheck = $true     # performs a vigorous check of the indexes
$SkipFolderCycle    = $false    # does not skip folder cycle checking.
$ForceDismount      = $false    # will not force a dismount (to enable errors to be fixed)
$RecoverBadSecors   = $false    # does not recover bad sectors
$OKToRunAtBootup    = $false    # runs now, vs at next bootup

$start=get-date
"Commencing Defrag"
$res=$c.chkdsk($FixErrors, 
              $VigorousIndexCheck, 
              $SkipFolderCycle, 
              $ForceDismount,
              $RecoverBadSecors, 
              $OKToRunAtBootup)
$finish=get-date

# Now Display returndvalue 
"Chkdsk call returned: {0}" -f (Get-DfragReturn($res.ReturnValue))

# Finally print time elapsed
"Starting Check Disk at: {0}" -f $start
"Finished at             {0}" -f $finish

$duration = $finish-$start
"Elapsed time            {0} minutes" -f ($duration.totalminutes.tostring("0.00"))

This script when run on a Longhorn Beta 2 system produces the followign output:

PS C:\Users\Administrator> .\wmi-chkdsk.ps1
Checking C:\ on system: LHS1
Commencing Defrag
Chkdsk call returned: 00-Success
Starting Check Disk at: 16/06/2007 16:45:55
Finished at             16/06/2007 16:50:31
Elapsed time            4.59 minutes
PS C:\Users\Administrator>