Davidkn wrote:
I haven't got an array to test this to know for sure so I'm going by memory.
But I don't think you can present a read only lun.
When you try and present the lun from the target, you're going to be creating a writable snapshot and presenting that I think.
So it will work to give you the templates for that moment, but when remote copy updates you won't see the updates, you would need to remove that presented snapshot and create another snapshot of the newly replicated data and present that.
So it would be manual each time.
That's how I understand it without have a play. Hopefully someone should be able to confirm whether I'm right or not.
You can present a read only lun. I've experimented with this before.
The problem is that without an operating system that understands that what it's seeing is a read only copy that will only become active on a failover, signaturing and mounting the lun won't work.
Presenting read only luns is really something you'll only do if you're stretching clusters using clx
The best way would be to create a virtual copy, and script the virtual copy being torn down and rebuilt from the ro lun periodically if you need to keep them in sync