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nop this shouldn't have any effect on the cluster or on exchange as long as your san supports dynamic expension (which you just said it did) you should be fine 
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nop this shouldn't have any effect on the cluster or on exchange as long as your san supports dynamic expension (which you just said it did) you should be fine

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of course it is always good to take backups 
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of course it is always good to take backups

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Do you think that dismounting the databases is necessary?
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Do you think that dismounting the databases is necessary?

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awesome thanks. we'll see how this goes later tonight.
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awesome thanks. we'll see how this goes later tonight.

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We have 2 Exchange Mailbox servers in a Single-Copy Cluster configuration, both looking at several volumes that contain our Exchange databases. One of these volumes contains 3 databases, and is almost out of disk space. Ive move mailboxes out, reclaimed white-space, etc, but now I need to extend the volume. Its very straightforward on the SAN LUN, and in Server 2008 to extend to volume, but what are the considerations for the Cluster Manager? <br />
<br />
Are these any steps that I need to perform in the Failover Cluster Management? I'm planning to dismount the databases during the extend, but leaving the Clustered Disks online. will Exchange self-destruct?
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We have 2 Exchange Mailbox servers in a Single-Copy Cluster configuration, both looking at several volumes that contain our Exchange databases. One of these volumes contains 3 databases, and is almost out of disk space. Ive move mailboxes out, reclaimed white-space, etc, but now I need to extend the volume. Its very straightforward on the SAN LUN, and in Server 2008 to extend to volume, but what are the considerations for the Cluster Manager? 

Are these any steps that I need to perform in the Failover Cluster Management? I'm planning to dismount the databases during the extend, but leaving the Clustered Disks online. will Exchange self-destruct?

Extending a Volume in an Exchange 2007 Single Copy Cluster

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.