中国DOS联盟

Is there a USB drive letter identification program like findusb similar to findcd?

In order to search for USB drive letters in batch processing, is there a USB drive letter identification program like findcd.exe for optical drives, namely findusb.exe?
If there is no ready-made program, is there any expert who can write a batch processing with this function!

Last edited by hxj on 2006-4-15 at 04:49 ]

@echo off
echo 盘符      可用空间
wmic logicaldisk where Description="可移动磁盘" get DeviceID,FreeSpace | find /v "DeviceID"
wmic logicaldisk where DriveType="2" get DeviceID,FreeSpace | find /v "DeviceID"
pause>nul

@echo off
echo Drive letter      Available space
wmic logicaldisk where Description="Removable disk" get DeviceID,FreeSpace | find /v "DeviceID"
wmic logicaldisk where DriveType="2" get DeviceID,FreeSpace | find /v "DeviceID"
pause>nul

See if it's a similar effect? If you change "可移动磁盘" to "CD-ROM disk", it can return the current optical drive letter.
Other matters are in my signature.

The person upstairs, by the way, I would like to ask, how to use wmic to execute a command on another machine?

wmic /node:target IP /user:username /password:yourpassword
Tested in SP2 environment can connect, but it seems that the permissions are insufficient, or the other party has not enabled RPC. Maybe it is because of logging in with an empty password. There is no condition, and I am too lazy to test and find the reason.

Thanks to 3742668:
The batch script you wrote achieves the goal!
You might as well compile it into an application findusb.exe, which should still be quite useful!

Then ask 3742668 again:

I omitted "FreeSpace" and only displayed the drive letter "DeviceID" of the USB flash drive, but how can I convert the displayed "DeviceID" into an environment variable that can be used in batch processing?

for /f %%i in ('"wmic logicaldisk where DriveType="2" get DeviceID |find /v "DeviceID""') do set mydrv=%%i

Wrap it with for..

for /f %%i in ('"wmic logicaldisk where DriveType="2" get DeviceID |find /v "DeviceID""') do set mydrv=%%i

Let's see if it works, not tested.

Originally posted by 3742668 at 2006-4-5 10:00 AM:
Wrap it with for..

for /f %%i in ('"wmic logicaldisk where DriveType="2" get DeviceID |find /v "DeviceID""') do set mydrv=%%i

See if it works ..

Tested, the result drive letter is incorrect, it extracted the file to the current drive (G:) instead of the USB drive (I:) I wanted to extract to.
Previously, I made one up myself that worked, but I always felt it wasn't good, please give me some advice

usb.bat:

@echo off
path %SystemRoot%\system32\wbem;%SystemRoot%\system32\
wmic logicaldisk where Description="Removable Disk" get DeviceID | find /v "DeviceID">a.txt
for /F "tokens=1" %%I in (a.txt) DO set USB=%%I
del a.txt
dosimg KV.img %USB%\ /s>nul
exit

But the above batch file works alone, but when called with call from my main batch file, it has an error, I don't know why

Finally, using start /wait /min usb.bat worked. I'm a DOS noob, these statements are made up randomly, I don't even understand them myself!

for /f %%i in ('"wmic logicaldisk where Description="可移动磁盘" get DeviceID |find /v "DeviceID""') do set mydrv=%%i

What about this sentence?

for /f %%i in ('"wmic logicaldisk where Description="Removable Disk" get DeviceID |find /v "DeviceID""') do set mydrv=%%i

Maybe the type of your USB flash drive is not 2. My CD-ROM type is 3 and the USB flash drive type is 2. I'm not at hand now, so I can't test. You can change the DriveType="2" in the previous sentence to 1, 2, 3, 4, 5, etc. for testing.
You can also post the main batch file, and by the way, explain the environment including the directory.

: :3Make Jiangmin DOS Anti-virus Flash Drive
REM Make Jiangmin DOS Anti-virus Flash Drive
path %Programfiles%\winrar
start /wait /min winrar e -p88888888 KV.pak kv.iso dosimg.exe -o+
start /wait /min winrar e kv.iso ezboot\kv.img -o+
cls
echo.
echo.
echo.
echo.
echo Now laoding databank into U disk, please wait......
start /wait /min usb.bat
del/q a.txt
del/q kv.i*
del/q d*.exe
GOTO BACKTOMENU

Windows XP system, current directory g:\dosav\kv\

Your version is relatively concise, I will continue to try!

Okay! Using your first batch file, adding %SystemRoot%\system32\;%SystemRoot%\system32\wbem to the PATH was successful!

Thank you very much, expert, for your guidance, it has been very beneficial!

This problem was originally solved, but now there is a problem of identifying the USB flash drive drive letter under DOS 7.1. It seems that the method of 3742668 can only be done under Windows. Is there any way under pure DOS?

Last edited by hxj on 2006-4-15 at 04:48 ]

wmic logicaldisk where Description="Removable Disk" get DeviceID,FreeSpace | find /v "DeviceID"

Is this wmic an internal command?
Why have I never heard of it before?
And on my machine, using wmic /? doesn't find relevant help information either

Re buddiyar:

wmic is obviously not an internal command, but it is a default installation component of WinXP/03. When you run wmic for the first time, it will prompt you to install to complete the configuration, and you can directly use it in cmd or batch files later. Please refer to:

WMI Command Line
http://www.cn-dos.net/forum/viewthread.php?tid=19738#pid115977

The character judgment of "removable disk" does not take into account the situation of USB-HDD (local hard disk).