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Different drive type reported

Posted: 04/26/2010 10:20:51
by Yura Sorokin (Standard support level)
Joined: 04/07/2010
Posts: 5

When I install CBFS Driver 3.0.74 using CallbackFileSystem::Install()
with SupportPnP==TRUE and then create a virtual drive with the following characteristics
the disk's type is reported as "fixed" (for testing I used drive list in "Far Manager").

At the same time, when the driver is installed with SupportPnP==FALSE and the disk is created with
I can see "subst" in the disk type field.

The problem is that some applications (like QuickBooks) do not allow their files to be saved on a "subst" drive.

My question is: is there any reason why the drive type is reported differently in these two modes and, which is more important, is there a way to control this behavior.
Posted: 04/26/2010 10:29:17
by Eugene Mayevski (Team)

In Plug-n-play mode physical disk device is emulated using plug-n-play driver. Previously this was not supported. Personally I would file it as a bug of QuickBooks and that other applications. It's not their damn business at all, where the user wants to save his or her data.

Sincerely yours
Eugene Mayevski
Posted: 04/26/2010 12:33:48
by Yura Sorokin (Standard support level)
Joined: 04/07/2010
Posts: 5

I brought this topic only because I noticed the difference migrating from 2.5.59 to 3.0.74.
In 2.5.59 (which was definitely a non-PnP driver) virtual drives used to be "fixed".
When I considered switching to 3.0.74 I decided to use non-PnP mode because I expected it to work more like 2.5.59.
However, in 3.0.74 in non-PnP mode the disk became "subst".

I was trying to ask if there is a way to make the disk "fixed" again in non-PnP mode in 3.0.74.
Posted: 04/26/2010 13:32:04
by Eugene Mayevski (Team)

Moved to helpdesk for investigation by driver developer.

Sincerely yours
Eugene Mayevski



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