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exchange 2010 database copies unhealthy

Posted on 2014-08-07
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Last Modified: 2014-08-11
Greetings,

I have a DAG set up between two exchange 2010 servers. The passive member has 4 DBs unhealthy. I have suspended replication but am not sure how to proceed. I was thinking that I need to delete the unhealthy copies then reseed but was hoping to get clarification on that and possibly the steps to do so (although I do realize it's not uncommon and steps can likely be found by doing a simple Google search).

Thanks for any help
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Question by:rpliner
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Amit earned 1500 total points
ID: 40246808
I think you know the steps already, however, if possible create new DB and check if that replicates properly or not. 4 DB's unhealthy is not common and you need to look hardware related issue, especially network and firewall.
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by:rpliner
ID: 40246827
Thanks Amit. I am on the standard version so I have the maximum number of DBs. I do have a small DB which I could use to test this by deleting the unhealthy copy and re-seeding to see if replication works properly. I did see error 4113 until I suspended replication.
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by:Amit
ID: 40246853
Error 4113 indicates you have network config issue. Suggest you to follow this:
http://technet.microsoft.com/en-us/library/ff622321.aspx

Also want to know, If you disable IPV6 recently?
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by:rpliner
ID: 40246867
Thanks for the link. I have not touched IPv6 since the servers were put into production a few years ago.
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by:Amit
ID: 40246878
Then  you try this one on one DB.
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03503410

I guess you don't have physical corruption issue. Check system logs for hardware issue, especially Disk related.
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by:rpliner
ID: 40246918
thanks for this link as well. I was hoping to not have to dismount the database to reseed though.

I was looking over the log files and noticed there was an error regarding the file share witness. The primary FSW has been set for quite some time. I noticed in the DAG properties that an alternate FSW is set up. However, that server is no longer in production but the error specifically shows the alternate as having an issue getting to the primary FSW. I went to remove the alternate FSW but can't as I get an error saying it can't be blank.
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by:rpliner
ID: 40247055
investigating further I noticed the information store service is not started. I am weary to start it until after I reseed but not sure when I should.

Also, I need to reboot the active server but I am not sure what will happen with DAG failover since the replication is failed and suspended. How should I go about rebooting the active server in this instance?

Thanks again for your help.
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by:Amit
ID: 40247086
IS on Passive server not running? Fix passive server, try to start the IS service. If any error post it. Why you want to restart Active Server?
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by:rpliner
ID: 40247166
the information store on passive server not running. I thought it should be. I need to apply some updates and also move the active server to new storage equipment.
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by:rpliner
ID: 40247167
is it OK to start information store on passive with the DBs in failed and suspended state?
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by:Amit
ID: 40247184
Ya, that is core service for Exchange. Can you post the services snap-in screenshot. I will tell you what all you need to start.
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by:rpliner
ID: 40247508
thx. I am not at a terminal right now but all the other services were started properly. we had to add some disk space to the passive server the other day when it was getting low and that's when the issues started.
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by:Amit
ID: 40248551
That is the reason DB's dismounted, you need to get additional disk space and then start IS service, reseed the DB's again and everything will be back normal, next time when you post any question, provide max info, so EE's can give you answer in first post itself.
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by:rpliner
ID: 40248986
is there an option to update the DBs on the passive server, without reseeding?
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by:Amit
ID: 40249057
No other option available, you need to use inbuilt reseed option.
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by:rpliner
ID: 40249207
ok thanks
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by:rpliner
ID: 40252274
sorry to just get back to this but I am now performing this. As stated in the article, my transaction logs on the active server are not truncating and now I am down to 18 GB out of 115 GB.

I am confused about the direction in bold below:

Option 1 :
Dismount the Database on Active Node.
Move all the files to some safe location except .EDB file and Catalog folder.
Mount the Database on Active Node.
Then run Update-MailboxDatabaseCopy command.

that obviously means on the passive server, correct? if so, there are no other files. There is only an .EDB and also an .EDB.IRS.RAW file.

Can I just remove the DAG and start from scratch after performing a full backup tonight to remove the transaction logs? I am getting worried about it filling up quickly.

Thanks again for all of your help
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by:rpliner
ID: 40252277
just checking the active server and the passive server's DB copies are showing "ServiceDown" on the active server DAG but "FailedandSuspended" on the passive server DAG.

Is that correct?
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by:rpliner
ID: 40253035
disregard service down - I just needed to refresh the view of the databases. after moving the servers to new storage and powering back on, the log file drive on the active server filled up quickly. These are VMs so I added space to the log drive to get email flowing again then I ran a Veeam incremental but the log files still didn't truncate.

I ran "Update-MailboxDatabaseCopy -Identity "Mailbox Database 01\EX2" -DeleteExistingFiles" in order to reseed. After reseeding, the log files were cleared from the active server.
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by:rpliner
ID: 40253044
I ran the command above from the passive server. I did not follow the HP link's directions because the command worked. The directions in the link were stating what to do if the command failed. I found this command and directions here http://exchangeserverpro.com/how-to-reseed-a-failed-mailbox-database-copy-in-exchange-server-2010/
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Author Closing Comment

by:rpliner
ID: 40253046
thanks Amit
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