Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results

Before Posting...
Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging

The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.

Check out The OSR Learning Library at:

Dismount volume minifilter

telegatelega Member Posts: 1
I need to handle disk ejection from cdrom in minifilter. I don't receive callback for IRP_MJ_VOLUME_DISMOUNT. Also I tried to handle IRP_MJ_FILE_SYSTEM_CONTROL to receive FSCTL_DISMOUNT_VOLUME, but FsControlCode is always 0.Do you know how to handle disk ejection?


  • rod_widdowsonrod_widdowson Member - All Emails Posts: 1,178

    Do you know how to handle disk ejection?

    No, but FAT and CDFS does. I'd check the sources. ISTR that you get some sort of verify irp down not on eject, but on first use after eject. You then get to say "Its the same" or "its changed" this may or may not help you of course.

Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Writing WDF Drivers 7 Dec 2020 LIVE ONLINE
Internals & Software Drivers 25 Jan 2021 LIVE ONLINE
Developing Minifilters 8 March 2021 LIVE ONLINE