Recovery After Power Outage

imagoit · Wed Dec 09, 2015 3:34 pm

Hi Starwind Support,

I wonder if you can help please. We are using your "converged platform" with two Hyper-V hosts which we purchased a few weeks back.

On Sunday we had a long power outage in our office which powered down both servers. when the power came back both servers started up but the VM's didn't.

The reason our VM's didn't start up was because our starwind SAN wasn't online. It was offline with the error message "Current Node is not synchronised". This was easy to overcome I simply pressed Mark as "Synchronised" and everything started up as normal.

Is there a method to auto start the Starwind SAN following a power outage such as this? I would prefer not to have to remote in at 1am to kick start everything after our quite frequent power outages.

Many Thanks,
ImagoIT

darklight · Wed Dec 09, 2015 6:13 pm

Imagine, if your servers go out of power with a delay between them, so one will have consistent data and the other one not and they will start syncing automatically in the wrong direction... not the best case I believe.

Just get a UPS for one of them, so it shut downs cleanly and goes automatically up when power is provided.

imagoit · Thu Dec 10, 2015 9:15 am

Hi DarkKnight thanks for your quick reply.

Good point about the UPS. We do have a rather large (6hour) ups + I will indeed be switching our servers onto this when they go live.

Am I right in thinking if the OS shuts down cleanly this issue wont occur?

Many Thanks,
ImagoIT

darklight · Thu Dec 10, 2015 12:26 pm

Yepp, exactly. In the case of a clean and graceful shutdown, everything will go up and running fully automatically since it's a supported scenario for both starwind and ms cluster.

Dark Knight, Prince of Darkness

Thu Dec 10, 2015 7:55 pm

Hi there!
So yeah, darklight, thanks for sharing absolutelly correct opinion!
@imagoit, I will arrange one of our engineers to call you to doublecheck if everything is OK.

imagoit · Mon Dec 14, 2015 3:06 pm

Just to confirm. This is now resolved.

I have now run a couple of test outages. Providing the Hyper-v servers are shutdown gracefully (via the shut down button) the san wakes up just fine.

Thanks for all your help.
ImagoIT

Mon Dec 14, 2015 3:57 pm

Glad to hear that!

Any other questions left here I can help with?