Non-Cached disabled on Network write operation

NTDEV
1

Hi all!

i have some problems hooking on Network writes with a minifilter
driver. For Local everything is working fine, i’m filtering Non-Cached
writes and performing all the processing there. In the case of a
Network file it seems that the Non-Cached writes are disable in any
way because it is reachen a point that they are not triggered. I have
compared both Procmon traces, with and without minifilter, without
minifilter application performs non-cached writes during all
processing and with minifilter there is a moment writes never appear
again.
From the traces i get that with my minifilter there is a point that
the “FASTIO_CHECK_IF_POSSIBLE” operations result in “FAST IO
DISALLOWED”, thus, no flush operation appears again.

I have tried to find some information but there is not too much about
Network writes and this different behaviour doesn’t make any sense to
me since it is working fine except for this.

Could anyone give me some clue about what is happening? I will
appreciate any information.

Thank you
Fran

2

The best clue I can give you is to post your question to the right list. That list is NTFSD (FSD = File System Drivers)… that’s where all the cool file system kids hang out.

This list is more for device-related (and general system related) topics,

Peter
OSR

3

OK. Thank you for the advice. I posted here because i received an
automatic reply and no answer for days.

Thank you, i’ll post in FSD.

Fran

2010/7/5 :
> The best clue I can give you is to post your question to the right list. ?That list is NTFSD (FSD = File System Drivers)… that’s where all the cool file system kids hang out.
>
> This list is more for device-related (and general system related) topics,
>
> Peter
> OSR
>
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4

Huh?

Anyhow… off topic, needs to go to NTFSD.

Thread locked.