China DOS Union

Need a batch file to get the remaining free space on a hard drive.


First get the size of drive A. If it is less than 20M then execute the del command; if it is greater than 20M then skip executing del.


Thanks, experts!

del is the command for deleting files, rd is the command for deleting folders. I don't dare try your problem. But I have some code reposted from the Internet that can check the machine's disk free space.
@echo off setlocal enabledelayedexpansion :Main cls set /a num2=1024*1024 FOR %%i IN (c d e f g h i j k l m n o p q r s t u v w x y z) DO ( IF EXIST %%i:\ ( SET num3_str= SET num4= MD %%i:\test FOR /f "tokens=3" %%j in ('dir /-c %%i:\') DO set num1=%%j IF NOT "!num1!"=="0" ( call :Loop FOR /f "delims=0 tokens=*" %%k IN ("!num3_str!") DO set num3_str=%%k echo The rest disksize of the prartition %%i is !num3_str! MB echo. ) RD %%i:\test ) ) pause :Loop REM division REM SET /a num3=%num4%%num1:~0,1%/%num2% REM The return value REM SET num3_str=%num3_str%%num3% REM arithmetical compliment REM SET /a num4=%num4%%num1:~0,1%%%%num2% IF %num4% EQU 0 SET num4= REM Set num1 REM SET num1=%num1:~1% IF NOT "%num1%"=="" GOTO Loop GOTO :EOF

The one above doesn't work when tested,


This one works, but I don't understand how to add a size check and then execute a command afterward.

@echo off&color b
set disk=x
for /f %%a in ('wmic logicaldisk where "caption='%disk%:'" get FreeSpace /value 2^>nul') do set %%a
if %FreeSpace% LSS 1024 set/a FreeSpace=(FreeSpace*1000)/1024&echo.&echo.&echo.&echo. %disk% drive free space is !Free! KB&pause>nul&goto :eof
set mn=MB
call :lp 1048576
set mn=GB
set/a modr=0
set FreeSpace=%t%
set t=0
call :lp 1024
goto :eof
:lp
set Free=%FreeSpace:~0,1%
set/a mod=modr*10+Free
set/a r=mod/%1
set t=%t%%r%
if "%t%"=="0" set t=
set/a modr=mod%%%1
set FreeSpace=%FreeSpace:~1%
if defined FreeSpace goto lp
set/a w=0
if %t% gtr 1024 goto :eof
set t=%t%.
set n=2
:loop
set /a modr*=10,r=modr/%1,w+=1
if %w% geq %n% set/a modr=modr%%%1*10/%1 && goto lpok
set t=%t%%r%
set/a modr=modr%%%1
goto loop
:lpok
cls
for /f "delims=0 tokens=*" %%i in ("%t%%r% %mn%") do set t=%%i
echo.&echo.&echo. %disk% drive free space is: %t%&echo.&pause&exit

Are you thinking of deleting all files on drive A, or just deleting files?
1. Checking the size: look at the last line of your program, %t% records the drive size. You can use an if statement. Convert 20M into the same unit as %t%, such as MB, KB, or byte.
2. Deleting files: after comparing, execute the del or rd command, for example:
if %t% lss 20 del /s %disk%:\ (unit is MB, deletes all files under this drive; if you want to delete all files underneath, you can use rd /s %disk%:\)
3. If your intention is to format the entire disk, then using the format command couldn't be better. You'd better take a look at format help: format /?

The intention is unclear, hehe.

。

If you're only checking one partition, the code below should work. If you want to check the entire hard drive, please modify it yourself...
@echo off set disk=d: for /f "tokens=2 delims==" %%a in ('wmic logicaldisk where "caption='%disk%'" get FreeSpace /value') do ( set "sth=%%a" ) set "sth=%sth:~,-7%" echo %sth% if %sth% lss 20 ( echo del something%If the displayed result meets your requirements, change this line to the delete command% ) else ( echo The disk capacity is already sufficient ) echo.&pause

Just modify the disk variable to the drive letter you need to check, and replace the echo line with the command you want to execute!
@echo off&color b set disk=E for /f %%a in ('wmic logicaldisk where "caption='%disk%:'" get FreeSpace /value 2^>nul') do SET %%a>nul set free=%FreeSpace:~-10% if not %FreeSpace:~0,-10%.==. goto GreaterThan :StripLeading0 if %free:~0,1%==0 set free=%free:~1%&goto StripLeading0 if %free% gtr 20971520 goto GreaterThan :LessThan echo drive %disk% is less than 20M pause goto :eof :GreaterThan echo drive %disk% is greater than 20M pause

Many thanks to the moderator. Thanks.