windows driver create disk

Question

I need to map a hard drive to a file similar to ImDisk(just not as sophisticated as it). However, I can't seem to create a drive and have it show up in My Computer. I have considered using ZwCreatefile and iocreatedevice but I haven't had any luck what so ever. Am I going in the right direction using these? Also this is using the WDM. I have also considered using the WDF. Is this a better option? Thanks in advance.

Answer 1

Have you looked at the ramdisk sample in the WDK at src\storage\ramdisk?   This should give you the basics you need.  It is WDF which is a better choice for this work.

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Don Burn (MVP, Windows DKD) Windows Filesystem and Driver Consulting Website: http://www.windrvr.com Blog: http://msmvps.com/blogs/WinDrvr

Answer 2

There are two ways to go about this:

1. Use an Explorer extension
2. Write a device driver

The Explorer extension has the virtue of being a user-mode DLL, and there are many samples on how to go about writing one in the SDK (although not specifically for exactly what you want). If you write a driver, RAMDISK would be a good starting point, as Don pointed out. It is likely that you will need quite a bit of additional infrastructure around such a driver, in order to specify which file is acting as the backing store, mounting and unmounting, etc.

-Brian

 

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Azius Developer Training, Windows driver, internals, and security training See www.azius.com for information