I can tell you for sure, it works. I am fairly certain it is supported. Not sure why it would not be.
ALL filers today use Software Ownership of disks. All platforms.

If you boot up one unit into maintenance mode: disown all disks. Halt
Boot the other node into maintenance mode: disown all disks. 

Now, you can use some command to:
disk assign xxx 12
where xxx is some combination of disk size, disk type, etc...defining which disks.
The 12 is the number to assign. It will pick 12.
Then you can do the same (or disk assign all, since 12 would be left)

Then you can configure and go.

I do this now. You must/should turn off the disk auto-assign function.

For the record, the slot 1/2 thing was during the hardware ownership and it read a
special section of the disk where the OS was stored. 

Todays software ownership systems boots off an internal flash drive
only using the disks for storing configuration.

I have a 4-node Clustered Ontap 8.2 system built this way.
I started from scratch, zeroed all disks, Attached one shelf to a pair
and then assigned disks. I grew them until all the disks were spilt evenly.

Since the disk-auto-assign is disabled and since no head owns all the disks in 
a shelf, I must assign the disk to head when I replace a failed disk.
Not a big deal.



--tmac

Tim McCarthy
Principal Consultant

          

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On Wed, Sep 25, 2013 at 4:24 PM, Jordan Slingerland <Jordan.Slingerland@independenthealth.com> wrote:
If you do not need capacity or performance, why not smaller FAS2xxx

A 10 data disks per aggregate is going to be sloooooooow.



-----Original Message-----
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of John Stoffel
Sent: Wednesday, September 25, 2013 4:16 PM
To: Scott Classen
Cc: toasters@teaparty.net
Subject: Re: What is the minimum number of shelves for a FAS3220 HA pair?


Scott> We are considering a FAS3220HA running clustered ONTAP (8.2) with
Scott> a single DS4246 shelf. However, we were recently informed by our
Scott> sales people that this is not possible, and that the minimum
Scott> number of shelves for an HA pair running cDOT was two. Apparently
Scott> each node needs it's own DS4246 for the cDOT operating system? Is
Scott> it not possible to split the disks on a single shelf into two
Scott> aggregates and assign one aggregate to each controller?

Each head needs it's own boot disks, and since it's hard-coded to boot off slots 1 and 2 (or some other pair, I forget) in the shelf, having just one shelf would not allow the other head to boot.

Personally, I'd probably gamble that a single 3220 with a single shelf doesn't really need clustering since you're obviously (to me at least, please correct me if I'm wrong) not looking for capacity or even massive performance, since you have a small number of spindles.  But I could be totally off base here.

John


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