Storage redundancy using two OSX servers - Promise RAID

Hi All,
Currently we run 1 Mac Mini and Server on Mavericks connected via Thunderbolt to a Promise RAID 5 device, it works great. I want some redundancy and have purchased an additional Mac Mini to backup Open directory and DNS as our main server does pretty much everything.
Incase the main server fails what is the best way for the Promise RAID to stay up? I've read you can create a "Thunderbolt Bridge" by connecting both Mac Mini's via thunderbolt cable and one to the RAID??? Is this correct? Or.... purchase a Thunderbolt to Gigiabyte adapter and run the RAID off the network. Any idea how to configure this?
Thanks.
James

Sadly Apple do not provide much if any facilities for building a resilient setup along the lines you are thinking.
The nearest you can get happens to be for Open Directory and DNS. You would setup two servers, one as the DNS master and one as a DNS secondary, and you would setup one server as the Open Directory Master, and the other as the Open Directory Replica. Neither of these require the two servers to share any storage or files, the two servers would send the information between themselves over the network. This only works for those two services.
You couldn't for example have both connected to the promise and act as File Servers. (Both ordinary files sharing or network directories.)
To get nearer to having two servers sharing common storage so that if one goes down the other takes over would require a SAN and not direct attached storage like the Promise. However Apple's software does not support this for file sharing services.

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RAID newb here. I've searched this forum and found some hints to the answer, but I thought I'd throw it out there anyway, just to be sure.
I have a Promise RAID, only the top enclosure is full. I believe only one controller accesses that top enclosure.
I have two servers. I know only one can access the controller at a time, but if I have two partitions, can each one access its own partition without affecting the other? If so, how do I go about setting that up?
Added bonus: One server is Leopard, the other is Snow Leopard.
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Thanks!
Michelle
Message was edited by: ModoReese

There are only two ports in the controller - if you're okay with only accessing the Promise from one connection each you can plug one server into one port and the other into the other.
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Some of the suggestions I don't understand quite well. Please could you explain further:
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>
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>
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> rest should be the same as normal
>
> this should be similar as well
>
> http://www.amdforums.com/showindex.php?s=&threadid=146384
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Message was edited by: Pondini

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Message was edited by: unvaluablespace

Hi,
Thank for posting in Microsoft TechNet Forum.
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I recommend you could refer to:
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Subscriber Support in forum. If you have any feedback on our support, please contact
[email protected]
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Storage redundancy using two OSX servers - Promise RAID

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