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We are trying to have an HA multipath were from 1 server (linux fedoraOS), we connect to 2 different storage devices (HP3Par) that are syncronously replicated. Our idea is that in case one of them goes down, the server can still access the information on the other storage.

It "kind of" works. But the filesystem mounts in read-only mode if write operations are being carried during the failure of the active storage. So we need to restart the server and then it works fine.

Any idea if this is even possible to do? Any hint, link or document we could have a look at that point us to the right direction?

Thank you!

carrotcakeslayer
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This requires a bit of technology outside the world of standard FC. Different vendors have different solutions. I know Hitachi, EMC, and Netapp all offer this, but it’s elaborate and involves, at least for EMC, client side software. I did a quick Google search and didn’t find anything for 3PAR.

That said, it’s not rocket science. If your server has the ability to validate the health of both storage devices, as well as make the replica read write, you could write a monitor that reacts to the loss of the primary device by making the secondary device writable and failing over to it.

Basil
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