Updated: August 12, 2004
Load Order Group
Altitude Range
Altitude
Company
Minifilter
Description (Optional)
Date Allocated
Filter
420000-429999
FSFilter Top
400000-409999
405000
Microsoft
dfsdriver.sys
DFS reparse point handler
05/08/2003
FSFilter Activity Monitor
360000-389999
385000
Microsoft (IFS Kit Sample)
minispy.sys (Top)
Displays File I/O Operation
05/08/2003
371000
Microsoft (IFS Kit Sample)
cdo.sys
Control Device Object
05/08/2003
370900
Microsoft (IFS Kit Sample)
ctx.sys
Context
05/08/2003
370800
Microsoft (IFS Kit Sample)
fmm.sys
Metadata Manager
05/08/2003
370400
Microsoft (IFS Kit Sample)
passThrough.sys
Pass Through Filter
05/08/2003
370300
Microsoft (IFS Kit Sample)
nullFilter.sys
Template Filter
05/08/2003
370000
Microsoft (IFS Kit Sample)
minispy.sys (Middle)
Displays File I/O Operation
05/08/2003
365000
Microsoft (IFS Kit Sample)
minispy.sys (Bottom)
Displays File I/O Operation
05/08/2003
FSFilter Undelete
340000-349999
FSFilter Anti-Virus
320000-329999
FSFilter Replication
300000-309999
304000
Legato
replistor.sys
Replication filter
06/08/2004
FSFilter Continuous Backup
280000-289999
FSFilter Content Screener
260000-269999
265000
Microsoft (IFS Kit Sample)
scanner.sys
File Data Scanner
05/08/2003
FSFilter Quota Management
240000-249999
FSFilter System Recovery
220000-229999
FSFilter Cluster File System
200000-209999
FSFilter HSM
180000-189999
FSFilter Compression
160000-169999
FSFilter Encryption
140000-149999
141000
Microsoft (IFS Kit Sample)
swapBuffers.sys
Swaps read/write buffers
05/08/2003
FSFilter Physical Quota management
120000-129999
FSFilter Open File
100000-109999
FSFilter Security Enhancer
80000-89999
FSFilter Copy Protection
60000-69999
FSFilter Bottom
40000-49999
FSFilter System
20000-29999
Updated: July 30, 2004
A filter driver's load order group specifies the relative order in which drivers are loaded. A minifilter driver's altitude defines its position relative to other minifilters in the I/O stack. This table lists file system minifilter driver altitude ranges for each load order group.
Load Order Groups
Altitude
Class GUID
Filter
420000-429999
<no guid presently defined>
FSFilter Top
400000-409999
<no guid presently defined>
FSFilter Activity Monitor
360000-389999
{b86dff51-a31e-4bac-b3cf-e8cfe75c9fc2}
FSFilter Undelete
340000-349999
{fe8f1572-c67a-48c0-bbac-0b5c6d66cafb}
FSFilter Anti-Virus
320000-329999
{b1d1a169-c54f-4379-81db-bee7d88d7454}
FSFilter Replication
300000-309999
{48d3ebc4-4cf8-48ff-b869-9c68ad42eb9f}
FSFilter Continuous Backup
280000-289999
{71aa14f8-6fad-4622-ad77-92bb9d7e6947}
FSFilter Content Screener
260000-269999
{3e3f0674-c83c-4558-bb26-9820e1eba5c5}
FSFilter Quota Management
240000-249999
{8503c911-a6c7-4919-8f79-5028f5866b0c}
FSFilter System Recovery
220000-229999
<no guid presently defined>
FSFilter Cluster File System
200000-209999
{cdcf0939-b75b-4630-bf76-80f7ba655884}
FSFilter HSM
180000-189999
{d546500a-2aeb-45f6-9482-f4b1799c3177}
FSFilter Compression
160000-169999
{f3586baf-b5aa-49b5-8d6c-0569284c639f}
FSFilter Encryption
140000-149999
{a0a701c0-a511-42ff-aa6c-06dc0395576f}
FSFilter Physical Quota management
120000-129999
{6a0a8e78-bba6-4fc4-a709-1e33cd09d67e}
FSFilter Open File
100000-109999
{f8ecafa6-66d1-41a5-899b-66585d7216b7}
FSFilter Security Enhancer
80000-89999
{d02bc3da-0c8e-4945-9bd5-f1883c226c8c}
FSFilter Copy Protection
60000-69999
{89786ff1-9c12-402f-9c9e-17753c7f4375}
FSFilter Bottom
40000-49999
<no guid presently defined>
FSFilter System
20000-29999
{5d1b9aaa-01e2-46af-849f-272b3f324c46}
