Try to install the ESXi in boot device failed as :
Disk is claimed by VSAN and --overwritevsan was not set. Contact VMware support
vSphere 7.0
The boot device was part of vSAN .
1 If the boot devices is managing by hardware RAID card , destroy the virtual disk in BOIS , then re-create it .
2 Install the boot devices into others system , format disk in Windows server , dd the disk first 1M bytes in Linux server .
3 Boot up the system by third party OS , format the disk in Windows , or erase the disk first 1M bytes by dd in Linux.