It’s Alive!

Well, after two days of serious work getting the cabling and power ready, EMC came out and spun up the Symm today.

Hot damn!  Finally some real storage and I can start planning the migration off the stupid Clariion. 😉

One down-side though, the Multiprotocol cards they shipped were the wrong type, since we have an M2 model DMX, the RDF cards were apparently shipped for an M1.

I have a question for anyone bored enough to be reading this.

Can anyone see any reason why 62.5micron fibre is used?  There is no signal-to-noise difference that I can see, and the range is not quite as long as the 50micron.  Our Network guy swears by the 62.5 and I keep telling him he’s on crack. 

However, thanks to the fact that he’s the one that designed the infrastructure, the links that go from the new datacenter to the old are all 62.5, and now I’m waiting on CDW to overnight me 6 new 10meter 62.5 micron cables to hook the new SAN into the old SAN so I can get the clariion migrated.

Always an adventure.  🙂



1 ping

    • on December 7, 2006 at 5:29 am
    • Reply

    Jesse, According to my own notes 50micron cable has higher bandwidth and lower attenuation than 62.5. However, Im not a network person and my own notes were made from back when I was studying up on fibre channel two or three years ago.
    Another thing Ive noticed from experience is that network people seem to favour 62.5 as well as LC connectors over SC connectors. Im pretty sure this is just because they are used to that from their Cisco type networking background that predominantly used 62.5 and LC connectors.

    • on December 8, 2006 at 12:56 am
    • Reply

    Price is the only advantage 62.5 has ever held over 50u. And just so you know, as it currently stands, 8Gb is going to REQUIRE 50u, so you might want to smack your “network guy” over the head a couple times before he makes any future purchases. I doubt you want to have to re-run all your cable in 4 years 🙂

  1. Too bad we just spent a quarter of a million on a cabling infrastructure. The good news is that *ALL* of the SAN storage (minus the cross-building links) is 50u, so that means that while the network end of things will have to be ripped out at some point in the near future, the FC should be fine.

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