Hi Everyone, We run a mac pro server here at our office. The machine itself is around a month old, and has been running great, minus one little issue that happened this weekend. The computer rebooted itself over the weekend. Now when I logged in this morning when I got to the office (using screen share), there wasn't a message about the computer restarted because of a problem. Going through all the logs I could think of, I saw no real errors, at least no kernel panics that I can see. The only real issues I saw were this in the system log: Jul 11 18:18:35 localhost kernel: Rebooted due to a SYS_RESET# event (Same as GEN_PMCON_2 bit 4) There are some smb errors: 7/12/15 2:46:21.000 PM kernel: smb_smb_ssnsetup: RT-AC87R-4AD0 doesn't support extended security, this server will be deprecated in the future! The weird thing is that RT-AC87R is one of our wireless routers. The only thing I can think of is this: We run Carbon cloner for our SAN which is connected to our mac. I had two back to back backups running over the weekend, both were going to separate NAS systems, one connected via SMB, and one connected via AFP. I noticed one backup finished, while the other didn't. Would the SMB connection caused it to reboot? Specifically if something happened perhaps with Carbon Cloner? Thanks all for any insight.