just asking, windows applications behave pretty strange

NTFSD
1

Why would, wordpad, open, on save the file with FILE_OVERWRITE_IF ?
I tried it even on files like have 30 MB. Why would you overwrite this file,

2

[SORRY JUST PREMATURELY HIT SEND]

Why would, wordpad, open, on save the file with FILE_OVERWRITE_IF ?

I tried it even on files like have 110 MB. Why would you overwrite this
file. Isn’t it easier to just write down the modified content ?

And the most unexpected one. I opened the 110 MB file, and just hit save. It
overwrites it and rewrites the whole 110 MB file.
There must be a reason for this. Isn’t the “map the region and write down
modified pages” the most feasible way ?

-----Original Message-----
From: xxxxx@lists.osr.com
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Sent: Sunday, October 26, 2008 3:08 PM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] just asking, windows applications behave pretty strange

Why would, wordpad, open, on save the file with FILE_OVERWRITE_IF ?
I tried it even on files like have 30 MB. Why would you overwrite this file,

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3

> There must be a reason for this. Isn’t the "map the region and write down

modified pages" the most feasible way ?

No. This would require much more complex document file format. Only the
database files are using this approach, not document files of any popular
document-editing apps.

One exception: embedded OLE objects can be saved to the container file
without rewriting of the whole container.

–
Maxim S. Shatskih
Windows DDK MVP
xxxxx@storagecraft.com
http://www.storagecraft.com