Cabling FAS 2240-2 with DS2246 and DS14-MK2-AT shelves ?

[Radouane]

Hello everyone,

We are planning to extend the storage capacity of a FAS 2240-2 (Ontap 8.2.4 in 7-Mode) with 4 DS14-MK2-AT shelves.

The FAS 2240-2 has currently 3 DS2246 shelves attached and running well which I cabled as per the recommanded guide.

I am concerned about the cabling between these shelves as I don't see any documentation.

Does anyone know how to cable FAS 2240-2 with DS2246 and DS14-MK2-AT shelves ?

[COMITSUPPORT]

https://library.netapp.com/ecm/ecm_download_file/ECMP1139842

HA pair with FC shelves and FC tape backup (page 26) - DS14MK2-AT connect to Mezzanine FC ports 

HA pair with external SAS shelves (Page 10) - DS2246 connect to the onboard SAS ports

The e0a,e0b,e0c,e0d onboard ports connect to host's for iSCSI, NFS,CIFS

no other ports available.

hope it helps

[andris]

That's a good doc to point to... but Example 12 (pg 29) is even more apt (no tape devices involved - just HA cabling DS14 shelves)

[AlexDawson]

Hi there!

Maximum drive count for a FAS2240-2 is 144 drives.

internal shelf + 3 external = 4 * 24= 96 drives

4 x DS14-MK2-AT = 56 drives

56 + 96 = 152 drives. Just leave 6 8 disks out.

[andris]

Good point, Alex... but the math dictates pulling 8 disks out...

[AlexDawson]

it sure does. Well spotted

[Radouane]

Thank you guyes for your help and replies and I apologize fot the delay as I was out of the office moving the shelves to another datacenter.

If my understanding is good, to get the DS14MK2-AT shelves attached to the FAS2240-2 I need a Mezzanine card in each one of the controllers. Once these cards are up I can then connect the DS14MK2-AT shelves following the guide. Does this operation require any specific configuration ? is it hot pluggable ? is it autoconfiguration ?

Also, I will not need to mix connection between DS14MK2-AT and DS2246 at anytime ? I was confused because DS2246 uses ACP cables and DS14MK2-AT does not.

Thanks again.

[andris]

If you don't already have the FC mezzanine module, I'm not sure where you'll be able to find them - NetApp no longer sells this platform or module.

The marketing part number is X1150A-R6.

You have to pull the PCM canister to install this module.

The ports are by default ready for attachment to DS14 storage shelves (assuming you have the cables).

There is no mixing between the FC-AL and SAS shelves. They are separate storage domains.  ACP is only applicable to the SAS shelves and the e0P ports on the nodes.

[Radouane]

Andris, your reply is very useful and relevant.
I went back to the DC and took a picture of the FAS 2240-2 rear's view which you can see  on the attachments.

In the documentation https://library.netapp.com/ecm/ecm_download_file/ECMP1139842 (page 6), the ports e1a and e1b on both controllers are refered as 10-GbE mezzanine cards.

Could you please confirm whether these ports are the required  mezzanine cards? and also which command I issue use to check they are mezzanine cards ? ( I used sysconfig -v but didn't get what I want).

Thank you so much.

[AlexDawson]

Hi there! We did two mezzanine cards - one for FC and one for 10G Ethernet. Unfortunately that is the Ethernet one, and not suitable for attaching DS14 shelves.