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Directly attached fibre channel cabling query

Posted on 2010-11-24
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Last Modified: 2012-06-21
Hey there,

can someone clarify the cabling I need to attach a Fibre Array ( Avid MediArray2) to a server ( DL580 G2 ) with 2 HBA's please?

I've got the array with dual ports in the back, both marked in / out.
I've got 2 x Qlogic 2200 HMA's.( single port)
I've got win3k server.

I can't figure out what the best or proper way to cable it is.

I am presuming that I run a cable from Qlogic 2200 1 to "IN" on first controller on array and run a cable from QLogic 2200 2 to "OUT" on second controller on array.

In my mind this is making a loop between server and storage.

Is this correct?

I've attached a diagram to explain.

Ideally, if I can figure out how and if it will work - I'd use one controller ( on array box) to attach to half the drives, and one for the other half.
Then present that as one logical storage area but I/O split.

Is that possible with my existing hardware and WIn3k standard?

cheers, Tom


FCv1.1.jpg
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Question by:tomglondon
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6 Comments
 
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Expert Comment

by:andyalder
ID: 34205374
You use in on both controllers by the looks of it, out is for daisychaining to a second disk unit.

http://aviddssupport.avid.com/pdf/storage/mediarrayII.pdf
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Assisted Solution

by:andyalder
andyalder earned 300 total points
ID: 34205423
Ph, and it's unlikely you can split disks over channels, normally LUNs are presented out of both controllers and you use MPIO (which you'll have to download from Microsoft) in a dual path setup to stop you seeing the LUNS / logical drives twice. There's probably a software guide on their support site that tells you how to create logical units and present them to your host bus adapters.
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Author Comment

by:tomglondon
ID: 34211417
Hi there Andy,

thanks for the advice.

I've cabled it using 2 x HBA both linked to the "in" on each side of the array.
I've cabled it using "in" and "out" on a single controller on the array.

Neither hook up seems to present the disks reliably. I'll try find the MPIO on the micciesoft site.

cheers.

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Accepted Solution

by:
tomglondon earned 0 total points
ID: 34212638
Just an update.

I cabled it using 1 x HBA to the "in" port - server booted and the card didn't see any devices.
I restarted server with cable from single HBA to the "out" port instead, and this time booted - saw all disks and I can create a volume from within windows.

I think that using both cards will need me to mask LUNS on one of the cards in order for windows to work with it- as you mentioned buty that's a bit out of my experience and understanding.
I couldn't find anything appropriate on the ms site.

Just to recap for anyone that is after the same info - single HBA - single cable - to one controller using the "out" or transmit port.


Thanks for your suggestions.
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LVL 56

Expert Comment

by:andyalder
ID: 34213038
Yup, they could mean out goes to host rather than in, the manual doesn't show what's written on the connectors.
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Author Closing Comment

by:tomglondon
ID: 34237144
Thanks for answering me but did not lead me to solution.
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