Home > Hyper-V, Windows 2008 R2 > My CSV is full… So what can I do ?!!

My CSV is full… So what can I do ?!!

One of my customers faced this problem.. he created Hyper-V cluster with CSV volume and start placing VMs on it.. after a while CSV start running out of space and he is planning to expand CSV volume using SAN tools. Is LUN expansion from the SAN level, is it support from MS ? What are the risks with doing that?

After some help from Microsoft support group I got this answer

According to:

 

Volume expansion is also a regular requirement since data growth is not often considered up-front. Cluster disks can be extended without rebooting if the controller supports dynamic LUN expansion. This feature allows for the physical expansion to be implemented without disruption and users can use tools (diskpart) provided by Microsoft to allow for the change to be seamlessly applied at the logical level as well.

 

Storage Topologies

http://technet.microsoft.com/en-us/library/cc738154(WS.10).aspx

 

We can see LUN expansion is supported by Microsoft Operation System.

 

Also, from the following information:

 

The ability to add storage while the system is operating enables better storage efficiency as it does not require any downtime for storage management. The storage can be expanded either by adding an additional LUN or by expanding the existing LUN on the CLARiiON array.

 

Optimized Storage Solution for Enterprise Scale Hyper-V Deployments

http://download.microsoft.com/download/D/E/6/DE619C29-BBCA-468F-960C-93B8113F612B/EMC_Sanbolic_MS_POC-Final.pdf

 

We can see the storage can be expanded either by adding an additional LUN or by expanding the existing LUN.

 

Regarding the risks, as far as I know, there should be no risk if we follow the proper steps to expand the LUN.

 

Here, I list following link for your reference:

 

Best Practices – SAN LUN Creation and Size Expansion for SAP Architectures

http://blogs.technet.com/b/lobapps/archive/2010/09/14/lun-creation-and-size-expansion.aspx

 

 

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