[throw0101a]

> Should I run Windows, Plan9, Solaris, FreeBSD, NetBSD, and Linux on my 5 servers to ensure I have diversity?

Running Windows and Linux would be a good start. Plenty of business-y software runs on POSIX systems: perhaps your business processes don't have to run the same operating system as your desktops?

Having a file share appliance (e.g., TrueNAS, NetApp) would be a good step after that (if things get encrypted just revert to the last snapshot).

[TheDong]

You may have missed the point of the question. All my machines (business and servers) are currently linux because I know how to update and secure linux.

The parent poster is arguing for diversity for the sake of it. To me, moving from my linux monoculture to a linux+windows diaspora seems less secure.

I'm talking specifically about the idea of security through diversity, not about this specific incident, so backup recommendations aren't really related to this thread.