Hello redfoxw85, you could have a look into the following log: /var/log/hostd.log and search something like Hostd: [12:51:54.284 27D13B90 info ‘TaskManager’] Task Created : haTask-ha-host-vim.H...
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Hello redfoxw85, you could have a look into the following log: /var/log/hostd.log and search something like Hostd: [12:51:54.284 27D13B90 info ‘TaskManager’] Task Created : haTask-ha-host-vim.HostSystem.reboot-50 If you find anything in this logs, this will indicate, that it was an deliberate reboot. What you also could test is to execute this command to check if ESXi is configured to automatically reboot after a Purple Screen of Death (PSOD): esxcfg-advcfg -g /Misc/BlueScreenTimeout If the value listed is anything other than 0, then ESXi automatically reboots after the PSOD. If the output is 0, the system is configured to wait for you to manually restart the host. Maybe this will help you to find the reason for the reboot. BR