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Rodolf1

4 Posts

10660

May 3rd, 2012 03:00

Failover mode 1 to 4 ALUA is online activity?

Hi ,

We have VNX 7500 with one Storage Group contain multiple ESX host (ESX 4.0, ESXi 4.1 and ESXi 5.0)

In that we configured failover mode set 1. And now we asked to change the failover mode to 4 (ALUA).

Can anyone confirm the failover mode 1 to 4 ALUA is an online activity?

Or do we need ESX host reboot to get the setting effect. if Yes let me know its for all ESX / (ESX 4.0, ESXi 4.1 and ESXi 5.0)

And also confirm do we need a separate Storage Group for ESX4.0 and ESXi5.

Configuration

VNX 7500 (Block)
software ver: 5.31.000.5.704

Thanks in Advance.

dynamox

2 Intern

 • 

20.4K Posts

May 3rd, 2012 05:00

changing ALUA requires host to be rebooted. The systems that are members of the same storage group , are they part of the same cluster ? If yes ..why so many different flavors of ESX in the same cluster ?

dynamox

2 Intern

 • 

20.4K Posts

May 3rd, 2012 06:00

"Can I change failover settings online?"

spacer
  spacerspacerspacer
ID: emc117938
Usage: 26
Date Created: 09/16/2005
Last Modified: 03/13/2012
STATUS: Approved
Audience: Customer
Knowledgebase Solution




Question: Can I change failover settings online?
Environment: Product: CLARiiON CX Series
Environment: EMC SW: Access Logix
Environment: OS: UNIX
Environment: OS: Microsoft Windows
Fix: No, you  must change the settings when the host is offline (No I/O going to the array from the host). If you change failover mode online (during production), you will lose access to data. Furthermore, entering incorrect values could cause the storage system to be unmanageable or unreachable by the host, and could cause the failover software to operate incorrectly.

NOTE: You must reboot the host after making the changes.

So it looks like you actually have to bring the server down, change the failover mode and then bring it back up.

What array are you using ?

dynamox

2 Intern

 • 

20.4K Posts

May 3rd, 2012 06:00

In Unisphere, go to Hosts ..you will see under Wizards "Failover Wizard".

Here is a good paper on VNX and vSphere integration

http://www.emc.com/collateral/hardware/technical-documentation/h8229-vnx-vmware-tb.pdf

Rodolf1

4 Posts

May 3rd, 2012 06:00

Many thanks for the response.

Is there any doc for step by step procedure to perform Failover settings changes?

Yes, all ESX hosts (ESX 4.0, ESXi 4.1 and ESXi 5.0) in one group.

Because each ESX LUNs are presented to each ESX hosts (ESX 4.0, ESXi 4.1 and ESXi 5.0) that is the reason all ESX host are in one Group.

Kindly suggest me the best practices from EMC. Can I go for separate group for each flavor?

Rodolf1

4 Posts

May 3rd, 2012 06:00

We are using VNX 7500 (Block) software ver: 5.31.000.5.704

The above solution is for VNX 7500?

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