How to put Exchange 2010 (CAS Array + DAG) in Maintenance Mode?

Hello,

I'm planning to upgrade memory (RAM) on Exchange Server 2010 running on two ESX hosts. I'm looking for directions to put some part of servers in maintenance mode while the second host handle traffic.

Here is the existing setup:

VMware ESX Hosts: ESX1 and ESX2

ESX1 hosts:
Client Access Server 1 (CA1) - Client Access Server Array (CAS Array)
Client Access Server 3 (CA3)
Hub Transport Server 1 (HT1)
Mailbox Server 1 (MB1) - Database Availability Group (DAG)
Forefront UAG Server 1 (UAG1)

ESX2 hosts:
Client Access Server 2 (CA2)
Client Access Server 4 (CA4)
Hub Transport Server 2 (HT2)
Mailbox Server 2 (MB2)
Forefront UAG Server 2 (UAG2)

Scenario: I need to put the ESX1 server down to upgrade RAM. Since both hosts contains two sets of server roles, I need to put servers in ESX1 host in maintenance mode, so that it won't interrupt the e-mail access.

Question: Since ESX1 running CAS Array and Mailbox DAG, how can I put both in maintenance mode, while another set of servers running on ESX2 handle the traffic in the mean time?

What's on my mind:

1. Remove (un-check from Windows Network Load Balancer - WNLB) the Client Access Servers (CA1 & CA3) from CAS Array.

2. Shutdown both CA1 and CA2 servers.

3. Then Shutdown Hub Transport Server 1.

4. Run the maintenance script (from Exchange Scripts folder) to put the Mailbox server (MB1) in maintenance mode.

5. Shutdown the server.

6. Upgrade RAM on ESX host. Restart all servers.

7. Re-add the Client Access Servers (CA1 and CA3) to CAS Array.

8. Run the maintenance script again to put the Mailbox server (MB1) into live mode.


I would appreciate if anyone can share your experience and thoughts along with Answer! :)

Thanks!
SrinathSAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Marc DekeyserSr Premier Field EngineerCommented:
Follow the following for the CAS (well up to the part they start updating the server :))
http://exchangeserverpro.com/how-to-install-updates-on-exchange-server-2010-cas-arrays

and this for the DAG maintenance: http://blogs.technet.com/b/timmcmic/archive/2011/09/26/exchange-2010-sp1-startdagservermaintenance-ps1-fails-on-databases-that-have-only-two-database-copies.aspx

So except for step 1 your plan seems sound
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
SrinathSAuthor Commented:
Geminon,

Our Exchange 2010 is running on SP1. According to that TechNet article followed by Microsoft KB (http://support.microsoft.com/kb/2585649), the maintenance start script will fail if it contain two databas copies. As I said earlier, both of our DAG members  hosts 4 or more databases.

Is this known issue still affects our environment? The first article link is an excellent guide to put the Client Access Server Array in maintenance mode.
0
Marc DekeyserSr Premier Field EngineerCommented:
You'll be fine. I merely referenced to that article as it explains the process :) (and I was to lazy to look up a better one to be honest...)
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

SrinathSAuthor Commented:
I also found another article on the same website to put the DAG in maintenance mode. Here it is: http://exchangeserverpro.com/how-to-install-updates-on-exchange-server-2010-database-availability-groups
0
SrinathSAuthor Commented:
Last part of the question:

Since ForeFront Security is running on all Exchange server roles, I will stip the service with the fscutility /disable command. Do I need to stop any additional services or any other steps necessary to put (just shutdown) Hub Transport (HT) and ForeFront Unified Access Gateway (UAG)?

Thanks for your guidance!
0
Marc DekeyserSr Premier Field EngineerCommented:
Not that I can think of.
0
SrinathSAuthor Commented:
Finally,

To upgrade RAM on one of Mailbox servers (2 mailbox member servers in one DAG group), I need to shutdown the server.

Do I need to run the Maintenance script to put one mailbox server in mantenance mode or just switchover the active databases to second server followed by server restart?

Thank you again! Just one step ahead to close the tread and assign points! :)
0
Marc DekeyserSr Premier Field EngineerCommented:
Use the maintenance script to perform the switchover. It will do everything for you and set that the databases cannot be mounted on the server you are upgrading until you take it out of maintenance mode.

Theoretically you could just move the primary to another server but the script is the nice way of doing things.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.