Rescan SCSI bus on NT 4.0

We are connecting a non standard scanner via SCSI to a PC using Windows NT 4.0.
We are not using a class driver, but deactivating the standard SCSISCAN device service and controlling the scanner directly by calling the API functions
CreateFile("\\\\.\\scsix:", ...) and
DeviceIoControl(...,IOCTL_SCSI_PASS_THROUGH_DIRECT,...).

All works well with the restriction, that the scanner must be switched on while booting Windows NT.

How can we avoid this restriction ?
Is there an API function to rescan the SCSI bus when the System is running ?
We intend to rescan the SCSI bus after CreateFile() fails and then try it again.

Any hint is appreciated !!
LVL 1
moosachAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

msmitsCommented:
I did this once in a program that used the ASPI (Adaptec) interface.

The problem I detected was that new devices were detected correctly,
but removed devices still showed up in the overview of available devices.
Although you got an error when actually accessing the device.

For information on the ASPI interface goto the adaptec WEB site at:

  http://www.adaptec.com

It should be possible to do the same thing with the DeviceIoControl function,
as I believe that is what the ASPI layer is using.

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Development

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.