When does async paging write happen?

When I opened a file of 1000M bytes in read/write mode and READ through it,
my RDR2 fs driver detected many async paging WRITE requests for the file.
If the file is smaller(200M) or opened in read only mode, no WRITE request
was detected.
Can anybody tell me why did the WRITE happen? Can it be virus?
Any documents available?
Thanks!


You are currently subscribed to ntfsd as: $subst(‘Recip.EmailAddr’)
To unsubscribe send a blank email to leave-ntfsd-$subst(‘Recip.MemberIDChar’)@lists.osr.com