Re:unreality?! (Score 1)

Where the hell did you learn to do uptime calcs? NO system has 99.9999% uptime other than embedded microcontrollers, surely not any box that runs an OS!

Uptime (including the fabled 5 nines) is measured over the course of a year 24*365 = 8,760 hrs/year * 60 mins/hr = 525,600 mins/yr 1 reboot a month @ 10 mins per = 120 mins dowtime/year = 525,480/525600 - .99977 or 99.977% uptime.

99.9999% = less than 6 minutes of downtime a year, an impressive feat for ANY box and OS.

This assumes your box reboots in ten minutes (including all services) I have a few large AIX boxes (8 way, 4 GB ram, SSA) that run multiple instances of Oracle that can take up to 15-17 minutes to boot. Fortunately they only need rebooted but once or twice a year for maintenance issues mostly.