VMware vSAN cache disk failed and how to recover from it

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Recently i rebuilt my VMware homelab from scratch and with the most recent vSphere version available at this point. I planned to rebuild my lab a long time ago but because of my job and other things I really hadn’t the time to do that. But recently I had to rebuilt my lab because I screwed up my vCenter. Yes, I screwed it. So what did that mean? Reinstall all and everything completely from scratch. All my physical ESXi hosts, domain controller, vCenter, Jumphost and backup server. All these services are running on a standalone ESXi server with some local disks. This server is called my homebase. I’ve got some more servers which are running my VMware vSAN environment. I reinstalled these too and reconfigured everything what was needed, like networking and storage.

This week one of my vSAN cluster nodes went into degraded mode because of one of the cache disks failed. I thought, easy, just replacing the cache disk and that’s it. But no, the struggle became real…

What happened?

I’ve got three DELL servers for my vSAN cluster. All servers are equiped with one SSD as cache tier and three SSDs for the capacity tier. Now one