Even the best hard drives fail, the question is if you have backups how often and if they are on another server.
Also I think it's important if the hosting company is there to restore the back ups quickly for you.
As far as networks if you use Verio or Cogent then you just have to deal with downtime plain and simple.
Anyone that says they have 100% uptime is lying, if you have hundreds of servers a hard drive is going to crash and you will need time to restore the backups. Oh and for raid? It messes up more then hard drives crash.
Mission critical is having a staff 24 7 just to restore backups and optimize the servers. They have this for the CA Police database I know one of the head techs there. Raid is outdated, there are better ways to sinc the back ups now without the method itself causing so many problems. In fact they went down one for a alomst a week when raid currupted down to all 5 levels of backups.
He told me the story about how cops couldn't use there computers for the whole time.
Don;t mean to sound like a know it all this is just what I have done everyday for years now. And LOVE IT
