Warm Boot Problem - what Distro is Unraid based on?

[dgwharrison]

If I issue shutdown -r now as root from an ssh session or locally the system will shutdown as expected but then the bios hangs indefinitely. You have to switch it off and on again.  It's a brand new motherboard so it's obviously the manufactures problem, however they only support major distributions of Linux like Debian, Centos, Fedora and Ubuntu.

 

So my question is, what is Unraid based on, or closest to?

 

My suspicion is it's because the system is booting from USB, so I'm going to have to make a USB bootable version of whatever is closest that they support to show them the problem.

[trurl]

Slackware