1. Health: People that live within a 1/2 mile radius of a fracking well have a 66% higher cancer rate.
2. Global Warming: Up to 9% of methane produced from fracking seeps into the atmosphere. Methane is 100x more potent as a greenhouse gas than C02, over the next 20 years
3. Ozone: Ground level ozone in some rural places, where there is fracking, is worse than ozone levels in downtown LA.
4. A gag order in the state of Colorado prevents your doctor from informing you if you have fracking fluids in your blood, making it much harder for you to get well.
5. Poisoning Water: More than 5000 spills have been registered with COGCC (CO State website) and approximately 43% have contaminated groundwater.
7. Toxic Chemicals: Of the 300-odd chemicals presumed in fracking fluid, 40% are endocrine disrupting, 1/3 are suspected carcinogens and 1/3 are developmental toxicants. Over 60% of these chemicals can harm the brain and nervous system.
8. “The Haliburton Loophole”: Currently, natural gas drilling is exempt from the Safe Drinking Water Act. Natural gas companies do not have to disclose the chemicals used during hydraulic fracturing. This provision took the Environmental Protection Agency (EPA) off of the job.
9.Methane levels in water sources that are close to fracking wells can be so high, that tap water in surrounding homes have been known to light on fire.
10. Earthquakes: According to the US Geological Survey, a sharp rise in seismic activity in the middle of the U.S. was the result of injecting water into deep underground wells for hydraulic fracturing.
11. Volatile Organic Compounds burn off from fracking fluid tanks. Some of these chemical compounds cause endocrine disruption, leading to genetic mutation in unborn children, while others cause cancer in adults.
Cisco Nexus 2xxx units run hot in a typical server cabinet because their short depth causes them to ingest hot air produced by servers. Exhaustive (get it?) detail here.
Today I learned that Cisco has released their own fix for the N2K's airflow woes. The NXA-AIRFLOW-SLV= "Nexus Airflow Extension Sleeve" is currently orderable, and it lists for only $150!
I've never seen one of these buggers, but I've heard that it's only 1RU, which is nice. I don't have any other detail about it.
It's orderable, but the lead times tool indicates that it's on New Product Hold. Cisco tells me that the sleeve will have full documentation and will make an appearance in the dynamic configuration tool (as an N2K option) within a couple of weeks.
Installing this bugger onto an existing FEX (especially one with servers mounted immediately above and below) will be an interesting exercise in problem solving, but looks possible. Power supply cables will need to be threaded through the duct before it's put into place. I wonder if the 2m power cords will be able to reach from the FEX, around the cold-side rack rail, and then all the way to the PDU in the hot aisle?
Also covered in the document is an interesting inlet duct (more of a hat) for reverse airflow FEXen (those with intake on the port end):
This guy makes sense if the FEX is mounted flush with the rack rails (as shown above) and has no equipment installed in the space directly above it. It'd probably be easier to mount the FEX so that the intake vent protrudes beyond the mounting rail like this:
...But this sort of mounting is usually only possible on the hot side of a cabinet. The cold side is usually pretty close to the cabinet door, and wouldn't tolerate 2" of FEX plus a couple of inches of cable protrusion. This accessory (the hat) doesn't seem to be orderable yet.
Ooooo. I might have to order some of these. This definitely solves a problem for me, ESPECIALLY if they are only 1RU.
Just pinged my Cisco team about this. We'll see what they say. It's so cheap, I might just order one to see what it's really worth in my cabinets. If I get that far, I'll take some pictures, etc.
They are not that great. A bit flimsy and they did not provide any holes or notches for the Power cables. This means the cables have to run through the length of the sleeve and come out the front of the rack. Now since PDU's are installed at the back, it means you have to used up 1U underneath it to pass your cables back through the rack. So they are 1U but makes you use 2U because they didn't make any holes to have your power come out. Also if you run containment you'll need to buy some sort of 1U with brush openings so that you can still block most of the air from going through the 1U that your cables need to run through.
"since PDU's are installed at the back, it means you have to used up 1U underneath it to pass your cables back through the rack"
Well, in fairness to the duct, it didn't introduce that particular problem. FEX power cords are going to need to find their way around to the back of the cabinet somehow. The installations I'm familiar with don't require any extra RU. The power cables go through a bristled thing off to the side of the vertical posts in the cabinet.