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тАО05-19-2011 04:03 AM
тАО05-19-2011 04:03 AM
Seeking SAN Switch Advice
I have a HP c7000 deployment featuring 2 HP B-series 8/12c SAN switches (bays 3 & 4) which I'm hoping for advice on.
Whilst I have plenty of experience with c7000's & VC 1/10 & Flex-10 modules, this is the first exposure to SAN switches, and I'm concerned about some pre-sales advice saying that for maximum resiliency the switches should be installed in bays 3 & 6, with each blade server having two HBA's.
In the virtual connect world itтАЩs all about pairing devices of course, do the same rules not apply to these SAN switches?
Thanks,
Julian.
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тАО05-19-2011 04:14 AM
тАО05-19-2011 04:14 AM
Re: Seeking SAN Switch Advice
usually the two SAN switches in the c-class enclosure would be in two different fabrics (not connected) -> they would not be paired.
You need to manage each fabric separately as each have an independent zoning database.
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тАО05-19-2011 04:16 AM
тАО05-19-2011 04:16 AM
Re: Seeking SAN Switch Advice
Like multipathing and load balancing maybe? If so, maybe you could be a little more specific?
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тАО05-19-2011 04:23 AM
тАО05-19-2011 04:23 AM
Re: Seeking SAN Switch Advice
I'm very green on these SAN switches generally, so apologies for the non-specific questions.
Initially what I wanted to know was is it wise to split the SAN switches by putting them in bays 3 & 6 (rather than 3 & 4) and using two seperate HBA's in the servers (BL460c G6's & 7's in my case). The suggestion is that this protects against HBA failure, but it doesn't feel 'comfortable' to me.
Regards,
Julian.
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тАО05-19-2011 04:36 AM
тАО05-19-2011 04:36 AM
Re: Seeking SAN Switch Advice
ah, I thought the 3/6 were next to each other.
No I believe the SAN switches should be next to each other so bay 3 and 4 just like you said.
You can see in the c7000 setup and installation guide:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00698286/c00698286.pdf
page 20
That
Mezzanine 1 goes to interconnect bay 3, 4
Mezzanine 2 goes to interconnect bay 5, 6 and then 7.
So if you have them in bay 3 and 6 you cannot use half of the ports as the FC mezzanine cards are all dual ports.