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Exchange Storage Groups & Mailbox Stores

By chris.brown ·
Currently running Exchange 2003 Enterprise.
I have a storage group with 4 stores in it and want to add another store.
I have installed a new drive in to the Exchange server and was going to create the new store on this drive.
Is there any reason why I shouldn't have my 5 stores under the one group spread over multiple local disks.?

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No real reason not to

by Dumphrey In reply to Exchange Storage Groups & ...

put them under one storage group. They key is spacing out the db disks and log disks so that no single array is getting hammered constantly.
The only reason I can think of to create a new storage group would be for policy application.

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Storage Groups & Mailbox Stores....

How many Storage Groups can you have on 1 Exchange server?
How many Mailbox Stores can you have in 1 Storage Group?

Storage Group:
Managing Information store is one of your most important tasks as a Microsoft Exchange Server 2000/2003 administrator. The information store can contain storage groups, data stores, and databases.

Storage groups allow you to group databases logically, giving you the option of managing an entire storage group (with all its database) or managing databases individually. When Exchange server is installed, the information store has a single storage group called First Storage Group. You can create additional storage groups as needed. Exchange Server 2003 Enterprise Edition is the most flexible. With the enterprise edition, you can create up to four additional storage groups as needed for a maximum of five storage groups per server (with one of the storage groups, called the recovery storage group, being reserved for database recovery operations).

Mailbox Store:
In Microsoft Exchange server, Data stores are containers for information. There are two types of data stores: mailbox stores, which store a server's mailboxes, and public folder, which store a server's public folders.

Every Exchange server installed in the organization has an information store. The information store can hold multiple storage groups, and you can create multiple mailbox stores within the storage groups. Each mailbox store has database files associated with it.

Mailboxes are the delivery location for messages coming into an organization. Mailboxes contain messages, message attachments, and other types of information that the user might have placed in the mailbox. Mailboxes are in turn stored in mailbox stores.

When you create a mailbox store, you specify the following information:

* What the name of the store should be
* Where the store's database files are to be located
* When maintenance on the store should occur
* What limitations there are on the mailbox size
* Whether deleted items and mailboxes should be retained

Also, do not forget to specify which Public Folder store to use. Every Exchange server in the organization has a default public folder store that refers to the All Public Folders tree. The All Public Folder tree is the only public folder tree accessible to MAPI (Messaging Application Programming Interface) clients such as MS Outlook 2003.

More info here:
http://www.msexchange.org/articles/Understanding-Exchange-Information-Store.html

Please post back if you have any more problems or questions.

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