New install on Supermicro server completes normally. SAS drives show in Linux as 4 separate drives whose SCSI ids are identical. Multipath is installed. Linux does not set up multipath access, Therefore Proxmox cannot use the drives.
Proxmox v6.3-3
LSI 9300-8i IT firmware (v16)
Supermicro SAS3 Dual Expander Backplane
Proxmox v6.3-3
LSI 9300-8i IT firmware (v16)
Supermicro SAS3 Dual Expander Backplane