ESXi 6.0 keeps randomly crashing

Question

Hello, my ESXi server keeps randomly crashing. At first I thought it was causeb by a faulty GPU which I passed through, but after swapping it
the server still keeps crashing. I took a look @ the vmkernel log and saw some errors with the datastore but the log went on until suddently a dumpfile was created "/var/core/hostd-worker-zdump.001"
Unluckily I can't open this file with cat through ssh. Maybe someone can help me with that server crash issue?
Kind Regards
Herb

Answer 1

Hi Linjo, thank you for the quick reply!
Hardware:
CPU: FX830
MB: Asus 990x Evo R2
Ram: Ares 16 GB DDR3 1600MHz
GPU: Nvidia K5000 or AMD HD6670 -> crashing with both
RAID Controller: FastTrak TX2300 -> only passed through to a VM, ESXi is not installed on RAID
NIC1: Intel 82574L
NIC2: Realtek 8168 -> Driver injected
Yes the hardware worked perfect until out of a sudden it crashed. The server doesn't reboot I think because I have to hit the reset button on the server to bring it back up again.
It's more like a freeze, I can't enter the host through vsphere or ssh but the server is still running. Maybe it's in a purple screen and doesnt reboot. Because I've passed through my GPU to a virtual machine I don't see
the purple screen(if there is any). Thats also the reason, why I try to debug the server logs. Do you have any suggestions which other logs I should check?
I really don't think it's the hardware which is crashing due to overheat or something like that, because than the server would just reboot and I would be able to connect to the host again through vsphere client.