> With this profile you can only loose one OSD at a time, which is really
> not that redundant.
That's rather situation dependent. I don't have really large disks, so
the repair time isn't that large.
Further, my SLO isn't that high that I need 99.xxx% uptime, if 2 disks
break in the same repair window, that would be unfortunate, but I'd just
grab a backup from a mirroring cluster. Looking at it from another
perspective, I came from a single host RAID5 scenario, I'd argue this is
better since I can survive a host failure.

Also this is a sliding problem right? Someone with K+3 could argue K+2
  is not enough as well.

Hans
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