Hi All,
I am writing a file system driver where I am attaching to Ntfs after getting a notification using IoRegisterFsRegistrationChange. This works fine and I can process all IRPs for Ntfs.
When I install Veritas storage central which is also a filter driver attaching on top of Ntfs. With my driver installed, QAFilter(one of the drivers from Storage Central) fails to attach to Ntfs. Both of these drivers(QAFilter and my filter driver) have LoadOrderGroup = “Filter”. In the group sequence myfilter gets first chance to attach & so works fine but QAFilter fails to attach.
By changing myfilter’s LoadOrderGroup to “FsFilter Top”, I made QAFilter to load first. This way QAFilter attaches to Ntfs properly, but myfilter does not get any notification for Ntfs registration even after requested it by calling IoRegisterFsRegistrationChange. I do get notifications for other file systems.
Why this notification on NTFS registration is becoming exclusive in this case?
Any pointers/suggestions on this would be very helpful.
Thanks,
Rushi.
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