The unplanned emergency, all data centers have down time
This morning I received an email with the subject "Fibernet -- Unplanned Emergency --".
It turns out that a core router on the Fibernet network went down, the entire network was down for a duration of 2 hours affecting a wide area of locations ( Utah Valley, Heber, Salt Lake Valley, Park City, Ogden ).Not long beforehand a power transformer blew at the Tier 4 data center in salt lake, the backup generators failed to kick in and there was also some downtime.
It seems that even with the latest and greatest in technology and with all the measures taken to prevent such happenings, major unplanned downtime still occurs.
Colo's/Data centers will tell you things that usually will make you feel a little more secure and comfortable about your decision, such as "we have 99.999% uptime every year".
This does account for these major outings and unplanned emergencies. If you do the math there are roughly 8,760 hours in a year, if you are up 99 percent of the time that would leave about 8,672 out of those 8,760 hours that they say your server will be up. The grand result being about 85 hours of downtime per year. That is quite a bit when you think about how long 85 hours actually is ( almost 4 days ).
A majority of this downtime will hopefully be planned downtime and will hopefully occur at a place in time that is not overly inconvenient to you or your business.