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Exchange 2010 DAG
Hi experts,
In my exchange 2010 environment, 4 exchange servers namely (server01, server02, server 03, server04) are in DAG.
2 DAG member servers(server01, server 02) are in primary site holding active DB copy and server03 is holding only mailbox role in primary site but not any DB copy and 1 DAG member server(server 04) is in secondary site having all passive copy of all DB.
Today I have faced issues that one of the DAG member server (server 02) in primary site were having issues and two DB were mounted in that server but suddenly I noticed that DB were become available, even I was not able to mount in another server in primary site, then also notice that exchange replication service was stopped, as soon as i started the Microsoft Exchange replication service then two affected DB automatically mounted in secondary site server04.
DAG Member : Primary Site: Server01(DB01,DB02), Server02(DB03,DB04)-active
Secondary site: Server04 (DB01,DB02,DB03,DB04) passive copy
Could you please advise why the two DB become mounted in secondary site. What needs to be investigated in the server to identify what actually occurred and what steps should I take to avoid this kind of incident.
My configureat
In my exchange 2010 environment, 4 exchange servers namely (server01, server02, server 03, server04) are in DAG.
2 DAG member servers(server01, server 02) are in primary site holding active DB copy and server03 is holding only mailbox role in primary site but not any DB copy and 1 DAG member server(server 04) is in secondary site having all passive copy of all DB.
Today I have faced issues that one of the DAG member server (server 02) in primary site were having issues and two DB were mounted in that server but suddenly I noticed that DB were become available, even I was not able to mount in another server in primary site, then also notice that exchange replication service was stopped, as soon as i started the Microsoft Exchange replication service then two affected DB automatically mounted in secondary site server04.
DAG Member : Primary Site: Server01(DB01,DB02), Server02(DB03,DB04)-active
Secondary site: Server04 (DB01,DB02,DB03,DB04) passive copy
Could you please advise why the two DB become mounted in secondary site. What needs to be investigated in the server to identify what actually occurred and what steps should I take to avoid this kind of incident.
My configureat
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Hi Simon, thanks for your reply, yes we have configured FSW one in primary site and other one is secondary site.
DAG Member : Primary Site: Server01(DB01,DB02), Server02(DB03,DB04)-active
Secondary site: Server04 (DB01,DB02,DB03,DB04) passive copy and FSW
Yes DAC mode is configured.
Hi Manish, thanks it could be reason for PAM/SAM role, I found the article excellent. PAM role was in the secondary site server , in this case server04. and it could be reason for this situation.
DAG Member : Primary Site: Server01(DB01,DB02), Server02(DB03,DB04)-active
Secondary site: Server04 (DB01,DB02,DB03,DB04) passive copy and FSW
Yes DAC mode is configured.
Hi Manish, thanks it could be reason for PAM/SAM role, I found the article excellent. PAM role was in the secondary site server , in this case server04. and it could be reason for this situation.
Are the servers in different AD sites?
If so, do you have DAC mode configured?
Simon.