"The 2006 survey found that both Linux and Windows Server 2003 were relatively crash-prone compared to Unix"
The study talks up to this point about downtime, not crashes. Was a separate "crash" metric also recorded?
I'd probably want to dig into the study in more detail, but these kinds of things are great for the Windows team to hear. I agree with the other comments--most likely, the issues here are patching-related, along with some administrative practices. This is especially true with regard to UNIX--UNIX is increasingly getting squeezed out of smaller hardware and tasks and running mostly on big-iron boxes with critical jobs these days, and those systems tend to be administered differently. However, that's not true of Linux. Hopefully "hot-patching" is going to be leveraged heavily in W2k8 and beyond. Things have been improving for Windows up until this point (remember having to reboot NT4 if you so much as opened the Network Control Panel? Changing IP addresses without a reboot--radical concept!), but this is a good call for even more.
At the same time, though, some of the administrative practices out there are horrible. I know there are shops out there that reboot their Exchange servers weekly because "that's how we've always done it." It's not early NT4 days, folks, c'mon. Someone is pulling the average way, way down--there is absolutely *no way* our servers spend even close to 9 hours down per year.
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