> Actually that's not true anymore. I don't know all the details of how it
> works, but RAID1 is bootable on Linux now, even your /boot partition can
> be RAID1. Since both drives are essentially a simple mirror the code
> is probably not too difficult. I've got two machines setup that way with
> Debian etch.
>   
It's possible to get a system that boots with either one of it's drives 
unplugged certainly but what about the different types of failure that 
can happen? will the bios correctly boot when a drive is still present 
but is failing to identify correcly or will it hang up at some kind of 
error? You can't really test those kinds of things so you just have to 
hope the bios vendor did what would be sensible for a raid setup.

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