There's indeed an issue with SD cards in current ESXi versions. However, that may or may not be the reason for the reboots. ESXi usually stops with a PSOD (Purple Scree Of Diagnostics) rather than rebooting itself on errors.
- Please check the Dell server's iDRAC logs for related entries
- ESXi always runs on UTC. The displayed time gets adjusted (for most screens) in the GUI depending on the client's time zone.
- What exactly is it that shows the high utilization? The ESXi host, a single VM? Please provide some details.
André
