Xsan mounting issues

graphiccare's picture

Hi folks

I have an issue with a setup I'm trying to upgrade for a client.

Current setup consists of 3 Intel Xserves on Xsan version 2.2.2 running 10.6.8 on a Qlogic switch.

We need to upgrade the Xserves to 10.9 so I have added 2 new Mac minis (10.9.3) with SANLink 2 thunderbolt to fibre channel adapters to act as MDCs and as temp servers while I upgrade the Xserves and get everything up to the same level.

Eventually they will all have access to the single SAN volume and I will redistribute which are MDCs. 2 of the current Xserves act as MDCs. One is strictly a client (and will remain so)

Here's the issue:

I have everything setup correctly (public and private IPs, all machines can see each other and ping etc...)

I can add the 2 new Minis via XSAN admin on themselves to the SAN but they will not mount the single SAN volume. All machines can see the same LUNS on the RAID via diskutil list.

If I add the Minis from Xsan admin on the Xserve running Xsan 2.2.2 it says "XSAN 2 not installed"

Any thoughts on why I cannot mount the SAN volume on the 2 new Minis?

If my setup is not clear enough I'll be glad to explain more. It's a pretty straight forward setup that's worked very well.

xsanguy's picture

Your config is unsupported (MDCs must always be the newest machines on the SAN, OS wise.) Is there a reason you are hesitating to upgrade the Intel Xserve MDCs one at a time? 09 Xserves run just fine and have quite a bit more power than minis anyway.

graphiccare's picture

We are going to upgrade the Xserves but I wanted to use one of the Minis as an MDC failover while I upgraded the Xserves one at a time. Are you telling me that I have to upgrade the Xserves that are currently MDCs first to Mavericks then I can add the Minis?

abstractrude's picture

Yes, or you can add the mini as a third controller and upgrade it first. It is probably time to kill the xserves. I am not sure why people like using these over minis. They are slower/hotter/louder and cost a lot more to run. I guess it looks cool in a rack?

-Trevor Carlson
THUMBWAR

xsanguy's picture

Well they're faster, and may generate more heat in the rack, but RUN a LOT cooler... 2009 Xserves absolutely stomp minis.

You can install the mini, if you can put 10.6.8 on it first. Why don't you just upgrade the Xserves one at a time though? I've done exactly that for quite a few clients.

xsanguy's picture

I assume we're talking about 09 model Xserves. There is a massive difference between 09 and earlier models.

Namely earlier models won't run 10.9.x, and are waaaaay slower.

abstractrude's picture

Xserves stomp i7 minis at executing stornext/cvfs threads? Doubt it.
They can do more work because QPI and some other Xeon related tech, but strictly as Xsan controllers? They are slower. (New 4 core Mac Pro, is perfect controller replacement btw)

When speaking of running cooler, I was talking about BTU output for your room, not how the computer feels on your hand.

If you had the fastest model 2.93 GHZ it would be slower than 2.6 i7 with Turbo. The truth is, Stornext wants faster clock speed than anything. Long ago this is why SPARC was not recommended as Stornext/CVFS/ADIC controllers.

Anywho, new mini coming out will be even faster. It is time to replace the xserves :)

-Trevor Carlson
THUMBWAR

graphiccare's picture

Yes, we're running 09 Xserves. Is there anything special I need to know to upgrade the primary and secondary Xserves that are MDCs to 10.9 server? Just install Mavericks client, run the server app to install the server components then fire up Xsan admin on it and let it migrate the data?
After that I can add the minis and move MDC roles around?