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FC Ports Front-End FC versus Back-End FC ports
In Clariion world I am trying to get a better grip on I/O and the exact difference between FE and BE Fiber Channel ports. Realizing host connectivity to the storage is via Fiber Channel what is the difference between the port being configured as a Front End or a Back End FC port? Is the Back-End FC defined by the LC Cable from the Storage Processor to the Physical Disk? I'm assuming FC doesn't necessarily always mean the Fiber Cable from the Switch to the SP but can always be the term for LCC cable from the SP to the DAE? Perhaps I answered my own question but I want to make sure I understand it as FC FE is always going to be Fiber Cable and BE FC will always be the Cabling from the SP to the Disk.
Thanks Much
Terry
dynamox
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May 31st, 2013 06:00
an old slide from my CX4 training days
AnkitMehta
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May 31st, 2013 06:00
http://www.emc.com/collateral/hardware/white-papers/h5773-clariion-best-practices-performance-availability-wp.pdf
Please, refer to Page Number 35.
o17Uu33DCF12520
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May 31st, 2013 09:00
Realizing host connectivity to the storage is via Fiber Channel what is the difference between the port being configured as a Front End or a Back End FC port?
I suppose there is no difference.
Is the Back-End FC defined by the LC Cable from the Storage Processor to the Physical Disk?
Yes
I'm assuming FC doesn't necessarily always mean the Fiber Cable from the Switch to the SP but can always be the term for LCC cable from the SP to the DAE?
It can indicate both
Perhaps I answered my own question but I want to make sure I understand it as FC FE is always going to be Fiber Cable and BE FC will always be the Cabling from the SP to the Disk.
You are correct, though cx should support both of FC and iSCSI FE ports.
kelleg
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June 7th, 2013 09:00
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glen