Click the Remove HA Config. Click the Add Standby. In the IP Address. This is the same IP address the peers in a high availability configuration use to communicate. IPv6 short form addresses are not supported. Type the local administrative Username. Type the Root Password. Secondary databases track only two recovery forks, so if you perform multiple forced failovers, any secondary database that did start data synchronization with the previous force failover might not be able to resume.
If this occurs, any secondary databases that cannot be resumed will need to be removed from the availability group, restored to the correct point in time, and rejoined to the availability group. Error with state may be observed in this scenario Error: , Severity: 16, State: A restore will not work across multiple recovery forks, therefore, be sure to perform a log backup after performing more than one forced failover. After quorum is forced on the WSFC cluster forced quorum you need to perform a forced failover with possible data loss on each availability group.
The forced failover is required because the real state of the WSFC cluster values might have been lost. Preventing normal failovers after a forced quorum is required because of the possibility than an unsynchronized secondary replica would appear to be synchronized on the reconfigured WSFC cluster.
But Node A and Node B retain a healthy quorum and the availability group remains online. On Node A, the primary replica continues to accept updates, and on Node B, the secondary replica continues to synchronize with the primary replica.
The secondary replica on Node C becomes unsynchronized and falls increasingly behind the primary replica. However, if quorum is forced on Node C, the synchronization of the availability group will be incorrect.
Since planned manual failovers guarantee the safety of the data, they are disallowed for bring an availability group back online after quorum is forced. When the WSFC cluster has a healthy quorum, you can estimate the current potential for data loss on databases.
For a given secondary replica, the current potential for data loss depends on how far the local secondary databases are lagging behind the corresponding primary databases.
Because the amount of lag varies over time, we recommend that you periodically track potential data loss for your unsynchronized secondary databases. Compare the values returned for each primary database and each of its secondary databases.
You can trigger an alert when the amount of lag on a database or set of databases exceeds your desired maximum lag for a given period of time. For example, the query can be run by a job that executes every minute on each primary database. After failover is forced, all secondary databases are suspended. This includes the former primary databases, after the former primary replica comes back online and discovers that it is now a secondary replica.
You must manually resume each suspended database individually on each secondary replica. Once the former primary replica is available, assuming that its databases are undamaged, you can attempt to manage the potential data loss.
The available approach for managing potential data loss depends on whether the original primary replica has connected to the new primary replica. Assuming that the original primary replica can access the new primary instance, reconnecting occurs automatically and transparently.
Typically, after a failure, when the original primary replica restarts it quickly reconnects to its partner. On reconnecting, the original primary replica becomes the secondary replica. The new secondary databases will not be not rolled back unless you resume them. However, the suspended databases are inaccessible, so you cannot inspect them to evaluate what data would be lost if you were to resume a given database. Therefore, the decision on whether to resume or remove a secondary database depends on whether you are willing to accept any data loss, as follows:.
If losing any data would be unacceptable, you should remove the databases from the availability group to salvage them. The database administrator can now recover the former primary databases and attempt to recover the data that would have been lost. However, when a former primary database comes online, it is divergent from the current primary database, so the database administrator needs to make either the removed database or the current primary database inaccessible to clients to avoid further divergence of the databases and to prevent client-failover issues.
If losing data would be acceptable to your business goals, you can resume the secondary databases. Resuming a new secondary database causes it to be rolled back as the first step in synchronizing the database.
If any log records were waiting in the send queue at the time of failure, the corresponding transactions are lost, even if they were committed. If you can temporarily prevent the original primary replica from reconnecting over the network to the new primary replica, you can inspect the original primary databases to evaluate what data would be lost if they were resumed.
Allow the original primary replica to reconnect to the new primary replica. Reconnecting causes the new secondary databases to be suspended. To start data synchronization on a database, simply resume it. The new secondary replica drops the original recovery fork for that database, losing any transactions that were never sent to or received by the former secondary replica.
If the original primary database contains critical data that would be lost if you resumed the suspended database, you can preserve the data on the original primary database by removing it from the availability group. At this point, we recommend that you attempt to back up the tail of the removed database's log. Then, you can update the current primary the former secondary database by exporting the data you want to salvage from the original primary database and importing it into the current primary database.
We recommend taking a full database backup of the updated primary database as quickly as possible. We recommend delaying additional log backups of the current primary databases until the corresponding secondary databases are resumed. Transaction log truncation is delayed on a primary database while any of its secondary databases is suspended.
Also the synchronization health of a synchronous-commit secondary replica cannot transition to HEALTHY as long as any local database remains suspended. Yes No. Sorry this didn't help.
Thanks for your feedback. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question 1. Report abuse. Details required :. Saturday, December 29, AM. Hi awsolomon, Thank you for the reply. Thursday, January 3, AM. Hi Awsolomon, Thank you for the post. Before going further, please help confirm the following three points: 1. Monday, December 31, AM.
When I start computer it attemps a startup repair and then displays this: Startup repair cannot repair this computer automatically. Tim, Add my name to this ever growing list. Friday, April 11, PM. Hey Tim! I'm actually having the same issue with my laptop.
After finishing installing some updates, I couldn't start it again. It's giving me the same error message. Thanks a lot! Sunday, August 17, PM. Anyone have any ideas what that specifically means? Friday, August 22, PM. Known causes to this problem: In the case of laptops, I've had 6 of them 4 dell, 1 hp, 1 Asus ALL exhibit this failure. Best Idea? Thursday, October 23, AM.
Wow it looks like I am not alone with this issue I wish I would have know this earlier I would have bought a Mac. Tuesday, October 28, AM. Monday, November 10, PM. I had this same problem. The only thing that worked for me is to do a clean boot. That means restore to factory settings and lose all data. If your patient, you can do a backup as I did.
But the factory backup feature skips over anything that is the "documents" folder, which happens to be where most important things are. It was wonderful at downloading a decompiled mess of all exe files into their base forms. No pictures were transfered, because of course they are all in "my pictures" or "my documents. Probably should of not even attempted backup when i got this problem. However, I was lucky enough to save most content in online backup storage. We all know that the problem is with a update in which Windows Vista forces upon the masses, but I can't find info on which update is the culprit.
I only now download updates which were published 2 or so years ago. For those who purchased their computer retail with software that has a "OEM license agreement," it is impossible to get a working vista installation disk, but they will surely keep you on hold for an hour an come back after their lunch to tell you they can't do anything to help, besides send out a recovery disk, which includes the same content that is already built into your D drive.
My computer works like a charm after a clean boot, but none of the original memory exists. I have a network of 23 desktops and I was fortunate enough to purchase only one with the OEM licensing on the Operating system.
Friday, July 17, AM. It seems this problem has been passed down to Windows 7. I just bought a brand new Dell with Windows 7. I installed my digital camera software Sony A and recevied the start up error. Dell does not give you OS software so I'm basicly just screwed. This is very frustrating especially after all the hype of Windows 7.
Please explain why MS can't get their act together on something as simple as their OS. Thursday, November 5, PM. Add us to the list.
My son's two month old lap top, which he's intentionally NOT loaded anything onto because this is exactly the kind of thing he didn't want, gave him the corrupt file error this morning. Interestingly, it was working fine until Microsoft Update downloaded something at am while he was sleeping.
I can still get to the command prompt to try what Tim suggested Thanks, Tim!
0コメント