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DFS_FILE_SYSTEM
DFS file-system failure for DFS_FILE_SYSTEM
DFS_FILE_SYSTEM is bug check code 0x00000082. DFS adds namespace and referral behavior above ordinary file access. This bug check points to DFS kernel state or filters interacting with DFS namespace paths, not merely to a failed network share lookup.
How to read it in a dump for DFS_FILE_SYSTEM
- The stack should show whether the failing path is DFS, MUP, redirector, SMB, or a file-system filter.
- Referral, namespace target, and UNC path state are important evidence.
- This differs from DFSC_FILE_SYSTEM, which is a related DFS client-side file-system code.
What to check for DFS_FILE_SYSTEM
- Check DFS namespace/referral configuration, SMB redirector state, and file-system filters.
- Capture whether the crash happens during referral refresh, target failover, reconnect, or offline/online transitions.
- Compare client and server event logs around the DFS referral time.
References for DFS_FILE_SYSTEM
- Microsoft clustering / DFS documentation
- Microsoft Bug Check Code Reference
- Crash dump files and WinDbg
Dump evidence for DFS_FILE_SYSTEM
For DFS_FILE_SYSTEM, preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop. AllStat summarizes the condition as “DFS_FILE_SYSTEM”; that sentence identifies the failure class, while the parameters and stack determine which object, driver, processor, or subsystem instance was involved.
Analysis order for DFS_FILE_SYSTEM
- Run WinDbg
!analyze -v, then inspect the documented meaning of each DFS_FILE_SYSTEM parameter instead of relying only on the probably-caused-by line. - For DFS_FILE_SYSTEM, find the earliest abnormal event: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang connected with dfs / file / system.
- For DFS_FILE_SYSTEM, keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.
Do not repeatedly reboot a machine affected by DFS_FILE_SYSTEM before collecting the dump and event logs. For DFS_FILE_SYSTEM, recovery actions should follow the component identified by the stack and parameters, not merely the symbolic stop-code name.
Dump evidence for DFS_FILE_SYSTEM
For DFS_FILE_SYSTEM, preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop. AllStat summarizes the condition as “DFS_FILE_SYSTEM”; that sentence identifies the failure class, while the parameters and stack determine which object, driver, processor, or subsystem instance was involved.
Analysis order for DFS_FILE_SYSTEM
- Run WinDbg
!analyze -v, then inspect the documented meaning of each DFS_FILE_SYSTEM parameter instead of relying only on the probably-caused-by line. - For DFS_FILE_SYSTEM, find the earliest abnormal event: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang connected with dfs / file / system.
- For DFS_FILE_SYSTEM, keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.
Do not repeatedly reboot a machine affected by DFS_FILE_SYSTEM before collecting the dump and event logs. For DFS_FILE_SYSTEM, recovery actions should follow the component identified by the stack and parameters, not merely the symbolic stop-code name.
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