Windows error 9654 (DNS_ERROR_FILE_WRITEBACK

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The DNS server could not write updated zone data back to its file.

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DNS_ERROR_DATAFILE_OPEN_FAILURE	DNS_ERROR_DATAFILE_PARSING

DNS_ERROR_FILE_WRITEBACK_FAILED

DNS_ERROR_FILE_WRITEBACK_FAILED means a file-backed DNS zone changed in memory but the server could not persist the change to its data file. Treat it as a durability problem: additional edits can be lost if the service restarts before the underlying cause is fixed.

What to check

Check disk space, file-system health, ACLs, and any process locking the zone file.
Identify the file path in the DNS Server event log and make a safe backup before further changes.
After repairing storage access, verify that the expected records persist through a controlled refresh or service restart window.

Microsoft: DNS zone types and zone transfers

Microsoft: DNS architecture, SOA, and authoritative zones

Microsoft: DNS logging and diagnostics

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