dos | KC's Blog https://www.kjctech.net Tue, 24 Jan 2023 18:21:07 +0000 en-US hourly 1 https://i0.wp.com/www.kjctech.net/wp-content/uploads/2016/12/cropped-KC-Logo.png?fit=32%2C32&ssl=1 dos | KC's Blog https://www.kjctech.net 32 32 24634607 How to make an old school SUBST virtual drive persistent https://www.kjctech.net/how-to-make-an-old-school-subst-virtual-drive-persistent/?utm_source=rss&utm_medium=rss&utm_campaign=how-to-make-an-old-school-subst-virtual-drive-persistent https://www.kjctech.net/how-to-make-an-old-school-subst-virtual-drive-persistent/#comments Mon, 19 Apr 2010 06:36:22 +0000 http://www.kjctech.net/2010/04/18/how-to-make-an-old-school-subst-virtual-drive-persistent/ If you have touched DOS before, you might still remember what this old school command subst is all about. It’s a command used for substituting local paths on physical and logical drives, known as virtual drives. For example, if you want to have a logical drive P: mapped to a local folder on your computer, say c:\temp, you can simply […]

The post How to make an old school SUBST virtual drive persistent first appeared on KC's Blog.]]> If you have touched DOS before, you might still remember what this old school command subst is all about. It’s a command used for substituting local paths on physical and logical drives, known as virtual drives. For example, if you want to have a logical drive P: mapped to a local folder on your computer, say c:\temp, you can simply use the following command to make it.

subst p: c:\temp

It’s very useful when you test out the application that uses a network mapped drive so you can have a complete test environment right on your local machine.

However, any subst’d virtual drivers are not persistent. You have to Subst them again once the computer is rebooted. Making a batch file that includes subst commands in it and placing it in startup folder doesn’t seem to be working for something.

If you want to make them like a permanent driver that doesn’t disappear, you can either

Create a new registry entry “string value” in the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\DOS Devices

The name of the entry should be “X:” where X is the drive letter you want to make.

And the value of the entry should be the local path in the form of: \??\c:\path. Make sure reboot once to make the change take effect.

Or, if you are not comfortable with playing around the registry keys, you can also use a tool called psubst with an option /p as well.

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