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тАО11-24-2003 07:21 PM
тАО11-24-2003 07:21 PM
How many FC connections are necessary for redundant connection one XP512 to another one using CA? By connection I mean FC pair. I thought, that it is two, but somedy told me, that it is four because the communication is divided for data and acknowledge parts. What are your recommendations?
Thanks,
Karol
Thanks,
Karol
Solved! Go to Solution.
3 REPLIES 3
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тАО11-26-2003 03:08 AM
тАО11-26-2003 03:08 AM
Solution
It depends!
The replication works unidirectional per FC link. So, if you want to replicate from one XP512 to another only but with redundant paths, 2 links are OK.
If you want to replicate bidirectional, you will need 4 FC connections.
Another thing to remember is that 2 ports on a XP512 CHIP share one microprocessor. So always two ports have to be set to either Host Target, CA Initiator or CA Target mode.
This means that you will need a full 8-port CHIP in order to do redundant, bidirectional CA. You will only connect 4 and leave the other 4 unused.
See the attached drawing.
Cheers
Peter
The replication works unidirectional per FC link. So, if you want to replicate from one XP512 to another only but with redundant paths, 2 links are OK.
If you want to replicate bidirectional, you will need 4 FC connections.
Another thing to remember is that 2 ports on a XP512 CHIP share one microprocessor. So always two ports have to be set to either Host Target, CA Initiator or CA Target mode.
This means that you will need a full 8-port CHIP in order to do redundant, bidirectional CA. You will only connect 4 and leave the other 4 unused.
See the attached drawing.
Cheers
Peter
I love storage
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тАО11-26-2003 08:05 PM
тАО11-26-2003 08:05 PM
Re: How many FC connection for Continuous Access
Peter,
only one additional question. Is this 2 port sharing true also for 2Gb CHIP for XP512?
Thanks,
Karol
only one additional question. Is this 2 port sharing true also for 2Gb CHIP for XP512?
Thanks,
Karol
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тАО11-26-2003 09:52 PM
тАО11-26-2003 09:52 PM
Re: How many FC connection for Continuous Access
Yes, also true for the 2Gbit/s CHIPS on the XP512.
It is different on the XP1024 where you can define it per port.
Cheers
Peter
It is different on the XP1024 where you can define it per port.
Cheers
Peter
I love storage
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