After the current mailbox database is corrupted - sugessions to Create a new exchange database for migrating the mailboxes.

Hi

We are using Exchange 2007 and Event ID 474 and 705 is occurring and the server goes offline  and I have to restart the information store when this event happens. I posted in the forums and I have been told either to do repair the database by using the eseutil/P , eseutil/D, isentig-fix OR to create a new database and migrate all the mailboxes to a new database.
So I would like to create new database and migrate all the mailboxes to a new database. On my exchange I have D drive where the corrupted database is located.

The path is D:\ExchangeDB\Mailbox Database.edb
The current drive size is 700GB

We use VMware, Is it ok to create a new database on the same D:
OR do I need to create a separate Drive and then to create a new database on this drive?
Please suggest.
lianne143Asked:
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Valentina PerezExchange ServersCommented:
Hi Lianne,

The important you need to know what is the size of database?

When you migrate mailbox it will occupied more space.

Regards
Valentina
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lianne143Author Commented:
Not sure , if this is the way to find the size of the current database. I right clicked the Mailbox Database.edb and the size is 380GB
The current size of D: is 612GB  
Used is : 475Gb
Free is :137GB

But I can double the size of the current Drive D: to 1.3 TB
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Valentina PerezExchange ServersCommented:
Hi,

Yes it is the way to know the size of database.

You do not have ebough space in D in order to migrate.

You need more space.

Regards
Valentina
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lianne143Author Commented:
Will it be sufficient, If I create free space of 700GB on D drive?
Thanks
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Valentina PerezExchange ServersCommented:
Hi Lianne,

If you add 700 GB it will ok. In this way your disk d, it will be  1.3 TB

Regards
Valentina
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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
Personally I would download a trail for test and then buy QMM, Quest Migration Manager. Use this to facilitate a new on prem Exchange system. This can also help you migrate seamlessly to the cloud in hybrid format.

Bottom line I would be done with Exchange 2007 and putting as little effort into fixing this as possible, yes that includes ESEUTIL.
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lianne143Author Commented:
We have planned to migrate the current exchange 2007 to 0365 by another 3-4 months. Until then I need to keep the current exchange server up and running.
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MaheshArchitectCommented:
But are you able to mount current database?

Note that if you are able to mount DB, then actually you should create new drive letter with approximately 600 GB drive space and start migrating mailboxes while allowing to mailbox corruption considering mailbox database will eventually grow after mailbox movement as part of day to day operations

Your current DB size on disk is about 475 GB and this also includes white space, when you migrate mailboxes from this DB to new one, white space will be recovered and you will have target database more compact and have more free space left on new drive

I don't want to complicate situation by having old and new DBs on same drive
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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
Keep Migration Manager in mind for that, it will do a great job for you.

In that scenario I would just create a new DB as per Exchange best practices create a new volume in Windows, grow the drive as you need/migrate mailboxes.
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Jose Gabriel Ortega CastroCEOCommented:
Ok to help out this:
1st. Size of the database can be gathered by using this script
        https://gallery.technet.microsoft.com/office/What-is-the-size-of-my-0e1993a7

2nd: Valentina's Point, if you want to move them to another Drive you would need a drive where you can save all the mailbox's data, so it should be the double of your actual size of the EDB. So, you can move the mailboxes and then clean up the database.

Also, there are other tools that are shipped with exchange server to reduce drive space:
Using PowerShell to regain drive space:
https://docs.microsoft.com/en-us/powershell/module/exchange/mailbox-databases-and-servers/Remove-StoreMailbox?view=exchange-ps
Using defrag option in Eseutil:
http://www.edb-pst.net/eseutil/d
Must be done strictly if required.


To check the mailbox number by databases you can use this:
https://gallery.technet.microsoft.com/office/Auditing-Exchange-07c35e83
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Create a New Disk and Migrate Mailboxes to new Store

I would also A's belt and braces Export Mailboxes to PST

In the past courruption has caused email loss to users
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SysToolsData Expert - Recovery,Backup,MigrationCommented:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It's the same Expert asking the same question that he neglected and did not select a solution!
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Also bad idea to migrate to same disk if you already have corruption on that disk surface also a new disk will perform better

As you will be reading from and writing to a new disk

No changes required on workstation

With 50p users complete out of hours in batches over night
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Marshal HubsEmail ConsultantCommented:
You can repair Exchange database by using Stellar Phoenix Mailbox Exchange Recovery.

As you said the you are planning to migrate the current exchange 2007 to 0365 by another 3-4 months. You can also repair corrupt exchange database & can also export repaired database to Office 365 by using  Stellar Phoenix Mailbox Exchange Recovery.

You can download the software from here: https://www.stellarinfo.com/edb-exchange-server-recovery.htm
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