Hello, it doesn’t appear you can partition a SSD in VMware Virtual SAN.
In a blog post from Duncan Epping, he writes
“Can I partition my SSD or disks so that I can use them for other (install ESXi / vFlash) purposes?
No you cannot partition your SSD or HDD(s). Virtual SAN will only, and always, claim entire disks. With VSAN it probably makes most sense to install ESXi on an internal USB/SD card, this to maximize the capacity for VSAN.”
Hope this is helpful.