batch script to find drive letter of a mounted device

Question

I am trying to write a batch script to locate a particular mounted device. I'm in windows 7.

I know that the device will have the folder drive:\\custom so I'm wanting to look at all possabilities to find a device with this path

Here is what i have so far

    @echo off
   setLocal Enabledelayedexpansion


for %%d 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 %%d:\custom (
     ECHO Device Found : %%d
  )
)

This doesnt work though, it thinks it exists for every drive letter.. so i see 'Device Found' for every single drive letter. Why is that? Am I going about this wrong? How can I locate the drive letter that has a folder 'custom' on the root directory?

thanks,
Stephanie

Answer 1

Use fsutil fsinfo drives inside the for statement instead of a static list of drive letters.

for /f "tokens=1,*" %%i in ('fsutil fsinfo drives') do (
  :: work with %%j here
)

However, if a drive letter is given to a device with no media, it may still give an error. Either way, a check such as:

if not exist O:\ @echo test

worked perfectly fine for me (with and without not ). The drive does not exist on my system, so no output was given when the not got removed.

Answer 2

A bit complicated, but this is the only solution to avoid blocking errors on Win7:

for /f "tokens=3" %%d in ('echo LIST Volume ^| DISKPART ^| findstr "Healthy Unusable"') do (
  if exist %%d:\custom echo Device found
)

Another method i've found is using the vol command + checking ERRORLEVEL (if == 1 the drive is not mounted):

for /f "tokens=3" %%d in ('echo LIST Volume ^| DISKPART ^| findstr "Healthy Unusable"') do (
   vol %%d:
   if !ERRORLEVEL!==0 if exist %%d:\custom echo Device found
)

NOTE: on WinXP DISKPART won't see removable drives...

Answer 3

在路径末尾添加\\ ：

IF EXIST %%d:\custom\ (...)

Answer 4

@ECHO OFF
:CICLO
CLS&ECHO.&ECHO  VER ESTADO UNIDADES CON WMIC
SET "DVF="

FOR /F "tokens=1,*" %%A IN ('wmic logicaldisk get caption^, description ^| FIND ":"') DO (

   VOL %%A >nul 2>&1 && (
      CALL SET "DVF=%%DVF%% %%A"& ECHO   %%A ^| ON.  %%B) || (
      ECHO   %%A ^| OFF. %%B
   )
)   
ECHO  DEVICEFOUND: %DVF%
TIMEOUT /T 5 >NUL
GOTO:CICLO

Answer 5

Try this:

if exist %%d:\nul (
   echo Device found %%d
)

Answer 6

This works for a hard disk and a pendrive:

@echo off
for  %%? 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 (
        dir %%?:\ > nul 2>nul
        if exist %%?:\custom echo Device found(s): %%?:\ 
)

PS: Run WinXP