BSOD 0x82 (DFS_FILE_SYSTEM): causes and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The Distributed File System kernel path detected a fatal file-system condition.

Could be also:
Constant	Type	OS
ERROR_DIRECT_ACCESS_HANDLE	Win32 error	Windows
ECONNABORTED	errno	Solaris
EOPNOTSUPP	errno	Windows

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SPIN_LOCK_INIT_FAILURE	OFS_FILE_SYSTEM

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

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

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

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