China DOS Union

Tip: Home edition of XP has no wmic～～～

Then what to do under NT system?

How to accomplish this under pure DOS?

Is there any content about mapping the CD-ROM drive as %cdrom%

Originally posted by gmy at 2006-9-11 21:06:
The character judgment of "removable disk" did not take into account the case of USB-HDD (local hard disk).

Since both USB-HDD and hard disks are detected as local fixed disks, it is difficult to judge in this way, but we can consider the way of judging the newly added drive, as follows VBS:

Set objWMIService = GetObject("winmgmts:\\.\root\cimv2")

Set colEvents = objWMIService.ExecNotificationQuery ("Select * From __InstanceOperationEvent Within 5 Where " _

        & "TargetInstance isa 'Win32_LogicalDisk'")

Do While True

    Set objEvent = colEvents.NextEvent

    If objEvent.TargetInstance.DriveType = 3 Then

        If objEvent.Path_.Class = "__InstanceCreationEvent" Then

        newdri = objEvent.TargetInstance.DeviceId

                Wscript.Echo "The newly added disk drive letter is: " & newdri

        End If 

    End If

Loop

I want to make a batch script that can automatically detect the drive letter of a USB flash drive when it is connected to the system and automatically perform operations like deletion, copying, or backing up. Please show me how to write the script. Previously, I wrote a relatively simple and rigid one that could only be fixed on a certain USB flash drive letter and required manual key presses. Also, when two are connected at the same time, it will go wrong because there is always a first and a second when connected, and the system displays the drive letters in a first-come-first-served manner, so often only the first connected one can be operated on...

Is the batch script upstairs meant to run all the time and detect USB drives at any moment?

Or is it meant to be placed on a USB drive as an autorun program for the USB drive?

The latter might be easier. You can use cd to get its path, then handle it a bit to extract the drive letter.

No, I want to make a batch script. When I need to use a USB drive, I just double-click to run it. Because I need to test many USB drives for work, and often do a lot of repetitive work, such as copying a 100M to 1000M test file, and then deleting it after the test... It's very tiring and boring... I want to make the batch processing run automatically, and all I need to do is plug in and unplug the USB drive, without having to click the mouse or keyboard again...

Additionally, what is the principle of detecting the USB flash drive drive letter? Is it only based on the disk name "Removable Disk"?

Additionally, what does DriveType mean?

DriveType represents the disk type
0: "Unknown"
1: "Removable disk"
2: "Local disk"
3: "Network disk or removable hard disk"
4: "CD-ROM"
5: "RamDisk memory disk"

Can we get the U disk drive letter without using wmic? Just use internal commands.

I searched a lot online, but it seems none are perfect.
There are devcon, wmic, vbs

Is there a way to achieve the following functions using DOS commands?
Automatically identify the USB flash drive, obtain the drive letter, delete the USB flash drive, and re-identify the USB flash drive.