DAG Reseeding Question

I was looking at my mailbox DAGs today and noticed one was in a failed and suspended state.  In doing some research, I found that issuing the following command will reseed the database.

[PS] C:\>Update-MailboxDatabaseCopy -Identity "Mailbox Database 01\EX2" -DeleteExistingFiles

Instead of issuing the PS command, could I right click the mbx server that needs reseeding and choose "update database copy" from within EMC?  Any difference between that and the PS command?

If the DAG maintenance scripts are run prior to shutdown or restart in the future, will this prevent the current issue?
Kram80Asked:
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AmitIT ArchitectCommented:
You can use EMS or EMC, you need to look at the root cause why it is failing. It could be network, disk, memory or cpu issue.

Open cluster snap-in and run cluster validation test.

I guess you are referring to start and stop dag maintenance script. If yes, those are used during any maintenance activity like service pack upgrade. Once you start the script, server will be out of DAG mix, once stopped it will be back to DAG.
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MAS (MVE)EE Solution Guide - Technical Dept HeadCommented:
when you use EMC that is also issuing a command
so if you are not familiar with EMS you better use EMC

As suggested above try to find the cause of the problem before reseeding.
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Kram80Author Commented:
One of the members of our team shutdown a member of the DAG without the maintenance script, so I think that's the root cause.  Sound logical?

This was done a few weeks ago.  I just discovered it today.  We have 300,000 for the copy queue length.  Would it be best to start the update database copy after hours?  Is it likely to have a big impact on our performance?
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Kram80Author Commented:
After updating, is it supposed to automatically resume replication?  Or will I need to do that manually within EMC.
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AmitIT ArchitectCommented:
If one server is shutdown db should failover to second server automatically. It seem your team member did a force shutdown, due to which db didn't failed over to another server and this issue happened.
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AmitIT ArchitectCommented:
Update the db again with delete file option. That will create a fresh copy.
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MAS (MVE)EE Solution Guide - Technical Dept HeadCommented:
Please check this for steps with screenshot
http://www.howtonetworking.com/email/exchseeding1.htm
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MAS (MVE)EE Solution Guide - Technical Dept HeadCommented:
Appreciate if you post the solution
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