Active Directory Database Error
Contents |
(עברית)المملكة العربية السعودية (العربية)ไทย (ไทย)대한민국 (한국어)中华人民共和国 (中文)台灣 (中文)日本 (日本語) HomeWindows 10Windows 10 MobilePrevious versionsMDOPSurfaceSurface HubLibraryForums Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Asked by: Fix: Active directory corrupted (NTDS ISAM Database Corruption errors in eventlog) Windows Server active directory access database > Directory Services General discussion 5 Sign in to vote It worked for me!
Active Directory Database Location Server 2008
Frank Keunen IT-Pro Evangelist :: Microsoft IT Infrastructure Engineer Follow the procedure below to fix Microsoft Active Directory database problems active directory database partitions (corrupted Active Directory due to e.g memory issues/disk problems): 1. Reboot the server and press F8. Choose Directory Services Restore Mode from the Menu. 2. Check the physical location of the Winnt\NTDS\ folder.
Active Directory Database Corruption
3. Check the permissions on the \Winnt\NTDS folder. The default permissions are: Administrators – Full Control System – Full Control 4. Check the Winnt\Sysvol\Sysvol folder to make sure it is shared. 5. Check the permissions on the Winnt\Sysvol\Sysvol share. The default permissions are: Share Permissions: —————— Administrators – Full Control Authenticated Users – Full Control Everyone – Read NTFS Permissions: —————– Administrators – Full Control Authenticated Users – active directory database size Read & Execute, List Folder Contents, Read Creator Owner – none Server Operators – Read & Execute, List Folder Contents, Read System – Full Control Note: You may not be able to change the permissions on these folders if the Active Directory database is unavailable because it is damaged, however it is best to know if the permissions are set correctly before you start the recovery process, as it may not be the database that is the problem. 6. Make sure there is a folder in the Sysvol share labeled with the correct name for their domain. 7. Open a command prompt and run NTDSUTIL to verify the paths for the NTDS.dit file. These should match the physical structure from Step 2. To check the file paths type the following commands: Start a command prompt NTDSUTIL Files Info The output should look similar to: Drive Information: C:\ NTFS (Fixed Drive) free (2.9 Gb) total (3.9 Gb) D:\ NTFS (Fixed Drive) free (3.6 Gb) total (3.9 Gb) DS Path Information: Database : C:\WINNT\NTDS\ntds.dit – 10.1 Mb Backup dir: C:\WINNT\NTDS\dsadata.bak Working dir: C:\WINNT\NTDS Log dir : C:\WINNT\NTDS – 30.0 Mb total res2.log – 10.0 Mb res1.log – 10.0 Mb edb.log – 10
may have a replication issue so I started looking into it and to give a brief background of the environment.. we have almost 48 Windows 2008 R2 domain controllers globally, so we needed to find out where and how the
Active Directory Database Size Calculator
replication is broken.. Now, i needed a tool that can go and check all domain
Active Directory Database Maintenance
controllers to summarize the replication inbound and outbound replication status.. so Ipulled up "REPADMIN"to find out the inbound and outbound replication status of active directory database name my domain.. I ran "repadmin /replsummary" and i started counting dots on the command screen which represent the progress. So after few minutes of processing, I had a summary report of the servers and unfortunately i found one of https://social.technet.microsoft.com/Forums/windows/en-US/172eb4bb-a8df-42ce-a1c7-472d33dc210a/fix-active-directory-corrupted-ntds-isam-database-corruption-errors-in-eventlog?forum=winserverDS our DCs hasn't replicated in last 16 hrs (quite worrying, huh!! ). But just next to it had a reason of the failure which said "The replication operation encountered a database error" Oopps, this is getting interesting now.. So, i logged in to the Domain Controller reporting database issue to investigate further and fix it. The directory service Event log showed me Database index corruption errors.. hmm interesting.. Log Name: Directory Service Source: NTDS ISAM Date: http://asknicks.blogspot.com/2013/05/active-directory-database-corruption.html 10.5.2013 10:03:21 Event ID: 467 Task Category: Database Corruption Level: Error Keywords: Classic User: N/A Computer: Test.domain.local Description: NTDS (492) NTDSA: Database C:\Windows\NTDS\ntds.dit: Index DRA_USN_index of table datatable is corrupted (0). Corrupt database? This willdefinitelyskip a heartbeat of most of the AD administrators.. :( so we ran little PowerShell script to quickly check all domain controllers for Event ID 467 and make sure we are not spreading the corruption over to other servers. Thankfully no other DC isexperiencingthe corruption.. Generally, the corruption can be caused by numerous reasons but i had few in my mind that requires a check there and then... Hardware Outdated Drivers/firmware especially disk controller & controller cache. Sudden power loss Lingering objects Time to fix it then.. most of the time the Domain Administrators prefer to go ahead and rebuild the domain controller and sync everything back, but the real concern is how many changes does this box hold and what would be the impact if we go ahead with demote andre promoteof the server.. hmm, so in our case we decided to go a bitfurtherand look for clues to fix the issue instead of going for a demotion.... So, the question was how can we find more details about the error.. and like always the answer was enable more logging..To increase NTDS diagnostic logging, change the following REG_DWORD values
two domain controllers for the domain Domain.com. DC1 -> DC2 replication working fine but the reverse DC2 -> DC1 doesn't seem to work. Below are the commands and https://lakshmanavn.wordpress.com/2014/10/27/ad-replication-issue-event-id-2108-and-1084-8451-the-replication-operation-encountered-a-database-error/ event ids which generated for the replication. ============================ C:\Windows\ntds>repadmin /replicate DC2 DC1 DC=Domain,DC=com https://www.experts-exchange.com/questions/28234485/Replication-Issue-on-Additional-Domain-Controller-Windows-2008-R2.html Sync from DC1 to DC2 completed successfully. C:\Windows\ntds>repadmin /replicate DC1 DC2 DC=Domain,DC=om DsReplicaSync() failed with status 8451 (0x2103): The replication operation encountered a database error. ============================ Log Name: Directory Service Source: Microsoft-Windows-ActiveDirectory_DomainService Event ID: 2108 Task Category: Replication Level: Error Computer: DC1.Domain.com Description: This event contains REPAIR PROCEDURES for the active directory 1084 event which has previously been logged. This message indicates a specific issue with the consistency of the Active Directory Domain Services database on this replication destination. A database error occurred while applying replicated changes to the following object. The database had unexpected contents, preventing the change from being made. Object: DC=DC1,DC=Domain.com,CN=MicrosoftDNS,CN=System,DC=barrylevin,DC=com Object GUID: 27709216-a6eb-4e13-a614-36becd89756b Source domain controller: cfaf2018-03a3-441c-834e-4d86f8c8c7ba._msdcs.barrylevin.com User Action Please consult active directory database KB article 837932, http://support.microsoft.com/?id=837932. A subset of its repair procedures are listed here. 1. Confirm that sufficient free disk space resides on the volumes hosting the Active Directory Domain Services database then retry the operation. Confirm that the physical drives hosting the NTDS.DIT and log files do not reside on drives where NTFS compression is enabled. Also check for anti-virus software accessing these volumes. 2. It may be of benefit to force the Security Descriptor Propagator to rebuild the object container ancestry in the database. This may be done by following the instructions in KB article 251343, http://support.microsoft.com/?id=251343. 3. The problem may be related to the object's parent on this domain controller. On the source domain controller, move the object to have a different parent. 4. If this machine is a global catalog and the error occurs in one of the read-only partitions, you should demote the machine as a global catalog using the Global Catalog checkbox in the Sites & Services user interface. If the error is occurring in an application partition, you can stop the application partition from being hosted on this replica. This may b
Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > Replication Issue on Additional Domain Controller Windows 2008 R2 Want to Advertise Here? Solved Replication Issue on Additional Domain Controller Windows 2008 R2 Posted on 2013-09-09 MS Legacy OS MS Server OS Active Directory 1 Verified Solution 27 Comments 2,054 Views Last Modified: 2013-11-15 We have 4 Domain Controllers (ABCDCQ1,ABCDCQ2,ABCDCQ3 and ABCDCQ4). In that ABCDCQ1 having all 5 fsmo roles. It’s single domain environment. We are getting replication error on ABCDCQ2 , this domain controller having Additional Domain Controller role only. We want to resolve replication issue on ABCDCQ2.Result of repadmin /showrepl which we ran on ABCDCQ2 is attached and PFA. We are getting replication error on DomainDnsZones partition only rest shows successful. Please assist us to resolve replication issue on ABCDCQ2. Replication-issue-on-Additional-.doc 0 Question by:ShailendraJadhav Facebook Twitter LinkedIn Google LVL 38 Active today Best Solution byfootech Have you already looked at Microsoft's guidance for this? They provide troubleshooting steps and resolutions. http://support.microsoft.com/kb/2645996 You could just demote and repromote, but it's better Go to Solution 27 Comments Message Author Comment by:ShailendraJadhav2013-09-09 Would you please look in to this at earliest. We want to provide solution as early as possible to our client. 0 LVL 38 Overall: Level 38 Active Directory 18 MS Legacy OS 8 MS Server OS 8 Message Active today Accepted Solution by:footech2013-09-09 Have you already looked at Microsoft's guidance for this? They provide troubleshooting steps and resolutions. http://support.microsoft.com/kb/2645996 You could just demote and repromote, but it's better to find out the actual cause if possible to help prevent it