Storage Boards Cleanup
To make it easier to find information about HPE Storage products and solutions, we are doing spring cleaning. This includes consolidation of some older boards, and a simpler structure that more accurately reflects how people use HPE Storage.
HPE StoreVirtual Storage / LeftHand
cancel
Showing results for 
Search instead for 
Did you mean: 

P4500 G2 - Node Removal from cluster

SFP4500
Occasional Visitor

P4500 G2 - Node Removal from cluster

I have five (5) storage nodes running SAN IQ 9. Each node has 12x600GB 15K SAS configured in RAID-5. These five (5) nodes are operating in a cluster.

 

On the cluster, I have a total of 27TB of space (27,226GB). I have thin-provisioned 10 volumes of varying sizes from 100GB to 300GB with all of them utilizing Network RAID-5 (single parity). There are no snapshots configured anywhere.

 

Use summary says:

 

Storage Space:

Total: 27,226.89 GB

Provisioned: 692.62 GB

Available: 26,534 GB

 

Saved Space:

Thin Provisioning: 3,092.84 GB

Smartclone Feature: 0.00 GB

Total: 3,092.84 GB

 

Problem: I am trying to remove one of the nodes from the cluster (technically, I want to remove 2 of the nodes so that I have just a 3 node cluster). However, I am unable to do so. The CMC comes back and says:

 

"the cluster cannot be modified because some volumes have a Network RAID setting that cannot support the requested change. Change the Network RAID setting and try again".

 

I realize that by removing a node the cluster will restripe the volumes. OK with me.

 

Questions:

 

What do I need to do? There appears to be plenty of space available (i.e. I am not trying to cut the cluster's total available space to less than what we have.)

 

 

 

1 REPLY
Jitun
HPE Pro

Re: P4500 G2 - Node Removal from cluster

I would suggest changing the volumes to Network RAID 10.

After the process of Restripe (if any) is complete, Remove the Nodes from the Cluster.

 

That should works.

You can change the Volumes back to Network RAID 5 after removal.

My personal Suggestion, leave the Volumes at Network RAID 10. Gives you the best protection and performance.

--------------------------------------------------------------
How to assign points? Click the KUDOS! star!