Q98417: Heuristics Don’t Disable MS-DOS Workstation Write-Behind

Article: Q98417
Product(s): Microsoft LAN Manager
Version(s): 
Operating System(s): 
Keyword(s): 
Last Modified: 30-JUL-2001

SUMMARY
=======

There is no effective way to disable MS-DOS workstation write-behind using
heuristics.

- Heuristic 0 sets the write-through bit on write SMBs telling the server not
  to return until the data is written, but does not disable the redir
  write-behind.

- Heuristic 1 applies only to write&X when X is submitted by the user
  application (as in CLOSE).

- Heuristic 4 does not, as documented, apply to writes: only to READs.

- Heuristic 10 applies only to FLUSH--COMMIT: not writes.

New heuristic (16) in LAN Manager 2.1a allows you to disable write-behind, but
only on files opened in compatible mode, not in deny-none mode.

Additional query words: 2.10 2.1 2.10a 2.1a 2.20 2.2

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