Can a host exist in multiple storage groups on the same array?

Question

Can a host exist in multiple storage groups on the same array? Running Flare code 02.19.700.5.27

Goal:
Provision storage to clustered servers serverA serverB

Servers would have dedicated storage so there would be 2 storage groups named serverA and ServerB.

Then servers would have shared storage provisioned via a storage group called serverA-serverB.

Thanks

vjm6971 · Answer

From the Navisphere online help:a server can connect to only one Storage Group per storage system at a time. If you connect a server that already connects to a Storage Group to another Storage Group, the server will disconnect from the first Storage Group. When you disconnect a server from a Storage Group, and then connect it to a different Storage Group, the server can no longer perform I/O to the first Storage Group.

dynamox · Answer

i have had to put LUNs in different storage groups for migration purposes. So it works fine. In my migration scenario ..i presented LUNs to two different storage groups, the systems were running HPUX so i knew they will not try to grab the drives and write its signature, like windows typically does.

Allen Ward · Answer

There is a way to do what you want, you just have to look at it from a different perspective. Instead of putting a host in multiple storage groups, take advantage of the ability to put LUNs in multiple storage groups.

I HAVE NOT done this myself yet, but I have talked to several people who are doing this successfully.

So in your case you would have a storage group for ServerA and one for ServerB. The LUNs to be dedicated to ServerA just go in that group, while the LUNs for ServerB are just in the ServerB group. Any LUNs to be shared get put in both groups and both servers can see them.

Hope this helps, and I suggest testing carefully first since I can't vouch for this solution personally. The docs say it should work and others have told me it works... I just haven't tried it out at my site.

CLARiiON

Can a host exist in multiple storage groups on the same array?

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