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Please help me understand controller/volume redundancy

 
atomicluis
Occasional Advisor

Please help me understand controller/volume redundancy

I am new to this.

I have 2 physical nodes in a Windows 2016 Cluster. 

An dual-controller MSA 1060 with a "Data" volume which is presented to both Nodes. 

 

My question is... If I disconnect the iSCSCI cables from 1 of the controller, is the volume supposed to be available to the Active Node? 

I tried this and lost access to the volume.

Are both controllers active? or is one of them supposed to be in Standby and kick in when the active one fails?

Thanks for help!

 

 

 

3 REPLIES 3
Ihaqueit
Trusted Contributor

Re: Please help me understand controller/volume redundancy

As per your query,

Dual controller means data passed thru these both controller.

If any malfunction in one controller then one controller act as main active controller and its change the state like write mode cache mean data pass thru one controller.

In your case how you setup the controller?

I Haq
Cali
Honored Contributor

Re: Please help me understand controller/volume redundancy

Hi,

is it cabled in this way?

Bild 2021-08-17-001.png

Then check this: HPE MSA 1060/2060/2062 Storage Arrays Best Practices

Here Section: CONNECTIVITY BEST PRACTICES

And Section: MPIO

Cali

 

ACP IT Solutions AGI'm not an HPE employee, so I can be wrong.
JonPaul
HPE Pro

Re: Please help me understand controller/volume redundancy

I think that the problem you experienced is the number of SESSIONs that your Windows system is creating to the storage target.
By default Windows will only choose a single path:  Initiator IP -> Target IP
You should create multiple sessions from the host to the target using the Initiator IPs specifically called out to the specific target IPs.
In other protocols the additional PATHs are automatic but in iSCSI they need to explicitly set.
You should see multiple paths to the LUN in the device manager or the MPIO manager.

I work for HPE