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Using the same LUN to a different server

Eida_1
Occasional Visitor

Using the same LUN to a different server

Hi,
I just wanted to know to have a LUN to be presented on a different server.

Server A as drive V
Server B as Drive W.


would there be any problem with this setting?

FYI, I'm using HP StorageWorks EVA4400 2C2D
5 REPLIES
Eida_1
Occasional Visitor

Re: Using the same LUN to a different server

Sorry, my question was not clear. Let me rephrase.

I just wanted to know if a Logical drive in SAN can be presented on a different server.

E.g
Server A as drive V
Server B as Drive W.


would there be any problem with this setting?

FYI, I'm using HP StorageWorks EVA4400 2C2D
Torsten.
Acclaimed Contributor

Re: Using the same LUN to a different server

This is waht each cluster usually does.

But you need to have a cluster aware filesystem on the LUN, otherwise you can easily corrupt your data!

Hope this helps!
Regards
Torsten.

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Rob Leadbeater
Honored Contributor

Re: Using the same LUN to a different server

Just to emphasise what Torsten says, presenting a LUN to more than server from the EVA is straightforward.

However you *must* be running some form of clustering software on your two servers.

If you don't and Server B tries to mount the Drive when it's already mounted on Server A, you *will* corrupt the file system.

Regards,

Rob
Emil Velez
Honored Contributor

Re: Using the same LUN to a different server

works fine if the lun is part of a polyserve clustered file system for windows otherwise no way to use a lun except in a failover mode with microsoft clustering.
Steven Clementi
Honored Contributor

Re: Using the same LUN to a different server

If you don;t need direct access to the lun on the second server and don;t mind reading/writing over the network connections...

You could present the lun to server 1, create a share on that server, map the share to a drive letter on the second server.

You can not otherwise do this unless you have a clustered file system of some sorts... Polyserve, Veritas, etc.

Even with a Windows Cluster, you can not access the same disk from multiple servers at the same time.

How are you looking to utilize the LUN?


Steven
Steven Clementi
HP Master ASE, Storage and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5)
RHCE
NPP3 (Nutanix Platform Professional)