中国DOS联盟

Can DOS commands be used to obtain the remaining disk space?
Dear brothers: Can DOS do it? ; )

The remaining space size can be displayed with dir/c; but I want to use the remaining space size as a judgment condition. Can dir/c assign the value of the remaining size to =a? set a=%dir/c% Is that okay?

No.

The purpose I mentioned is to achieve that when the free space on drive D is less than 500MB, delete the earliest 2GB of data created in drive D. Brothers, do you think it can be achieved through a *.bat?
"Don't laugh if the problem is naive, I'm a newbie!"

Newcomers are not ridiculous, but it is not good if newbies keep asking questions without seriously studying previous discussion content.

Your question is not complicated and should be relatively easy to solve. I can suggest that you use the for command to extract relevant values for judgment, or use the wmic command:

wmic logicaldisk list brief

wmic logicaldisk where deviceID="c:" get FreeSpace |more +1

Change the c: in it to other drives for other drives

If it is under pure DOS:
1
Use a third-party get K, but it seems to only support up to 2GB
2
Use a third-party LMOD, analyze the result of DIR, no 2GB limit
dir C:\ /w/ahd | find " free" | lmod /s set freesize= >freesize.bat
call freesize

Using diskpart is also good~

Can you give a detailed explanation? How to use him in the conditional judgment? Thanks!

for /f %%a in ('wmic logicaldisk where deviceID="c:" get FreeSpace ^|more +1') do if "%%a" geq ......

Thanks. If the verification is okay, I'll come back later to thank the guide.

I tried many things and none worked. Can any expert explain it in detail?
What I want to achieve is:
If the space on drive D is less than 1GB, automatically delete the 2 folders with the earliest creation time.

Dude, please pay attention.

@echo off
set driver=e
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "Available bytes"') do set c=%%c
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "Available bytes"') do set d=%%d
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "Available bytes"') do set e=%%e
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "Available bytes"') do set f=%%f
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "Available bytes"') do set g=%%g
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "Available bytes"') do set h=%%h
echo %d% | find "bytes" >nul
if %ERRORLEVEL% neq 0 goto nexte
set space=%c%
:nexte
echo %e% | find "bytes" >nul
if %ERRORLEVEL% neq 0 goto nextf
set space=%c%%d%
set /a space=%space%/1024/1024
:nextf
echo %f% | find "bytes" >nul
if %ERRORLEVEL% neq 0 goto nextg
set space=%c%%d%%e%
set /a space=%space%/1024/1024
:nextg
echo %g% | find "bytes" >nul
if %ERRORLEVEL% neq 0 goto nexth
set space=%d%%e%%f%
set /a space=%space%/1024/1024
set t=%c%
set /a t=%t%*953
set /a space=%space%+%t%
:nexth
echo %h% | find "bytes" >nul
if %ERRORLEVEL% neq 0 goto nextx
set space=%c%%d%%e%%f%%g%
set space=%d%%e%%f%
set /a space=%space%/1024/1024
set t=%c%%d%
set /a t=%t%*953
set /a space=%space%+%t%
:nextx
echo %driver%:=%space%M___FREE
echo Press any key to exit... && pause>nul