Help on formula

[jip31]

hi

i use this code to monitore the hdd free space
index="perfmon" sourcetype="perfmon:logicaldisk" instance=c: counter="% Free Space" | eval Value = round(Value, 2). "%" |table _time host Value
but this code give me the free space and not the buzy space
i have 89% free so i would to have instead 11% busy
how can i do please??

[jip31]

thanks it works!

[p_gurav · Accepted solution]

Can you try subtracting free space from 100. Like, |eval Value=100-round(Value)