Monitoring free space

Previously I described one unusual method to help clear out space on windows, details are here, If you want to make sure your windows server (or workstation), doesn't get too low on free space you can use some of the many monitoring tools out there which eat up system resources when you use them and/or cost an arm and a leg.  My solution is to have a script which goes out and checks the drives, and saves the information to a csv file so you can check for trends using any spreadsheet program.  It will also send out an e-mail if the space is too low.  I run this script from the windows task scheduler at 7am and 7pm, against all the different servers.

Usage:  drv-space.bat  servername

note: e-mail functionality requires blat.exe which you can get at http://www.blat.net/, and you will have to set some variables in the script also.

rem -----begin script --------

@echo off

set tech=network.admin

set techdom=company.com

set mailserver=mail.company.com

set machinednsdomain=company.com

set blatexe=c:\utils\blat.exe

set freespacenum=1000000000

rem shouldn't need to change any variable below here

rem usage drv-space.bat servername

set server=%1

echo processing server %server% at %date% %time%

for /f "tokens=2" %%W in ('date /t') do set dater=%%W

for /f "tokens=1,2 delims=:" %%t in ('echo %time%') do set timer=%%t:%%u

for /f "tokens=1-3 delims=/" %%d in ('echo %dater%') do set curdate=%%f%%d%%e

for /f "tokens=3 delims=/" %%y in ('echo %dater%') do set curyear=%%y

echo checking drive space

for /f "tokens=3" %%s in ('dir \\%server%\c$ ^|find "free"') do set drvct=%%s

for /f "tokens=3" %%s in ('dir \\%server%\d$ ^|find "free"') do set drvdt=%%s

for /f "tokens=3" %%s in ('dir \\%server%\e$ ^|find "free"') do set drvet=%%s

rem strip out the commas from the values

set drvc=%drvct:,=%

set drvd=%drvdt:,=%

set drve=%drvet:,=%

echo checking if we have at least a gig on drive c. 

if %drvc% LSS %freespacenum% goto emailwarning

goto savetocsv

:emailwarning

echo on 

echo we got less then 1 gig

rem if we have less then one gig we need to send an e-mail, but only if we haven't already done so today.  

if exist %temp%\%server%-%curdate%-low-space-msg.txt goto savetocsv

echo apparently need to email about %server% at %time%, only %drvc% bytes free

echo drive c on %server% has only %drvct% bytes of free space on it as of %date% %time% > %temp%\%server%-%curdate%-low-space-msg.txt

%blatexe% %temp%\%server%-%curdate%-low-space-msg.txt -to %tech%@%techdom% -server %mailserver% -f %COMPUTERNAME%_drv-space-check@%machinednsdomain% -s "%server% low on free space"

:savetocsv

if not exist %server%-free-space-%curyear%.csv echo date ,time ,drive c ,drive d ,drive e >> %server%-free-space-%curyear%.csv

echo saving to csv %time%

echo %date% ,%timer% ,%drvc% ,%drvd% ,%drve% >> %server%-free-space-%curyear%.csv

rem -----------------end of script----------------