How many DAEs were existing and which are the newly added one? The visio diagram you provided does not provide the right Bus number based on the connection you showed. The Fourth enclosure from the bottom is shown to be connected to Bus 0 - but you mentioned it is Bus 1 Enclo 1.

The DAEs will have two connections namely "PRI" and "EXP" - based on your connection - it is understood that the one on the right side is PRI and one on the left side (of the reader) is EXP - but marking them in the diagram will help.

Also, please mark the BE0 and BE1 ports on the very first enclosure - it will help to identify the bus properly.

Request you to mark the existing DAE and new DAE as well.

I assume, you have data on the existing DAEs and the Bus or Enclosure numbers are not altered for those DAEs.

We can try to help you here - but feel free to contact your EMC Customer Engineer or EMC CLARiiON support.

Thanks,
Sandip

Fixed image:

http://www.postyourimage.com/view_image.php?img_id=M0pXjDMb5PXFQ9T1207673728

That's much better - also they are in proper order now. So, the new DAE-ATA has been connected to Bus1 - it is not really a problem, it will work fine - but as per standard cabling guide it should have been connected to Bus 0 (Enclosure number remains the same i.e. Enclo 2) - So the FCC cable should have been connected from the PRI port of 3rd Enclosure from the bottom. You are right in pointing this out.

You may continue with this configuration - it will work without any issue - but if you want you may reconnect the cables - please engage the EMC Customer Engineer and/or the Support person who was onsite.

Request other experts in this Forum to guide or suggest, if otherwise.

Thanks,
Sandip

The 2nd picture looks good to me !
However, it depends on what your performance needs are. In the 2nd picture you show us that you have 2 ATA enclosures, one on each bus. So IO's going to and coming from those disks are moved accross both buses. I can imagine you'd want the ATA's on 1 bus and the FC's spread accross both buses, but like I said: it all depends on your needs and IO behaviour.

Thanks for pointing that out. I'm still learning the system and you are correct in that I do not want the ATA arrays on the same bus as the FC drawers.

The new controller was initially setup on BUS0 (from BUS 0 ENC 1) but he couldn't get the system to recognize it.

However, he forgot to change the enclosure address on initial power on and we received the "Dup Encl Addr - Shunted" error. I'm wondering if that somehow disabled something on Bus 0 where he couldn't get it recognized after powering it off and changing it to the proper enclosure address?

Thanks Sandip. I contacted my EMC sales rep and he is putting me in touch with someone. I also agree with RRR in that I want the ATA traffic outside of the FC traffic.

That's a pretty well balanced configuration - with 5 enclosures and 2 backend busses splitting them 3/2 is as balanced as it can be, and each bus has some FC and some ATA. Putting all the FC onto one bus and all the ATA on the other bus could be detrimental (not helpful) if for example FC gets heavy traffic during the day for production and ATA gets heavy traffic during the evening for backups. The current config allows such IOs to get distributed across both backend busses. There are other IO profiles we can imagine where a different enclosure distribution may be preferred, however there is not a general recommendation to keep ATA and FC enclosures on different busses.

Regards,
DGM

Message was edited by:
DGM

Like I said: it depends on what you want, but you definately need to think about it.