Explain: Five Nines ( 99.999% ) Computer / Network Uptime Concept in Categories AIX, CentOS, Debian / Ubuntu, Fedora Linux, FreeBSD, Hardware, Linux, Networking, OpenBSD, RedHat and Friends, Solaris-Unix, Storage, Troubleshooting, UNIX, Windows last updated September 9, 2008Q. Some service provider guarantees 99.999% uptime for their service. Can you explain meaning of five nines?