DFS-R 斷線過久不再進行複寫問題

EventLog DFS Replication 中出現 Event ID 4012

The DFS Replication service stopped replication on the folder with the following local path: C:\DFSR\Folder. This server has been disconnected from other partners for xxx days, which is longer than the time allowed by the MaxOfflineTimeInDays parameter (60). DFS Replication considers the data in this folder to be stale, and this server will not replicate the folder until this error is corrected. 

To resume replication of this folder, use the DFS Management snap-in to remove this server from the replication group, and then add it back to the group. This causes the server to perform an initial synchronization task, which replaces the stale data with fresh data from other members of the replication group. 

下指令:

查詢 MaxOfflineTimeInDays 設定值:
wmic.exe /namespace:\\root\microsoftdfs path DfsrMachineConfig get MaxOfflineTimeInDays

Step-by-Step Guide for upgrading SYSVOL replication to DFSR (Distributed File System Replication)

以下文章非本人撰寫，僅為預防出處網頁有一天不存在而轉載
This Article is not written by myself.
Just a backup in case of the original one might be offline someday.
All credit goes to http://www.rebeladmin.com

Origin URL：
http://www.rebeladmin.com/2015/04/step-by-step-guide-for-upgrading-sysvol-replication-to-dfsr-distributed-file-system-replication/

SYSVOL is a folder shared by domain controller to hold its logon scripts, group policies and other items related to AD. All the domain controllers in network will replicate the content of SYSVOL folder. The default path for SYSVOL folder is %SystemRoot%\SYSVOL. This folder path can define when you install the active directory.

Windows Server 2003 and 2003 R2 uses File Replication Service (FRS) to replicate SYSVOL folder content to other domain controllers. But Windows server 2008 and later uses Distributed File System (DFS) for the replication.  DFS is more efficient than FRS. Since windows server 2003 is going out of support, most people already done or still looking for migrate in to latest versions. However migrating FSMO roles WILL NOT migrate SYSVOL replication from FRS to DFS. Most of the engineers forget about this step when they migrate from windows 2003 to new versions.

For FRS to DFS migration we uses the Dfsrmig.exe utility. More info about it available on https://technet.microsoft.com/en-au/library/dd641227(v=ws.10).aspx

DFS-R 某些檔案不複寫的問題排除

DFS 是分散式檔案系統
DFS-R 是分散式檔案系統的複寫功能

一直以來我都覺得 Domain 環境下 DFS 相當好用
可以給 User 一個固定的連線 UNC Path, 即使 File Server 異動也不會影響到 User 既有的習慣
再加上可以使用複寫功能, 能達到備援的目的 (備援不是備份, 切記!)

但使用一陣子過後總會偶爾發現就那某些檔案無法被複寫
原因不明, 不管是改檔名或複製一份, DFS-R 都完全無動於衷, 完全沒有想要複寫的意思
剛開始, 覺得問題一定是出在 DFS-R 機制上面, 微軟一定有 Bug
在 C:\Windows\Debug 有 Dfsr00xxx.log 的 Log File 可以查看
發現不能複寫的檔案會顯示這樣的訊息
UsnConsumer::TombstoneOrDelete LDB Deleting ID Record
UsnConsumer::TombstoneOrDelete ID record deleted from USN_RECORD
但是完全沒有幫助, 找不到任何相關資訊

接著往檔案資訊去想, 在檔案資訊的 Attributes 中看到了不同之處

DFS-R 複寫失敗問題處理

DFS-R 是好東西
但最近一直遇到複寫失敗, RPC 連線失敗的情況
試遍各種網路上找到的偏方都無效

包括:

• Event 5014 DFSR Error:1726
  https://social.technet.microsoft.com/Forums/windowsserver/en-US/d27bd902-034e-4230-9516-0ede42308193