HPE ProLiant ML350 Gen9 - Install successful, boot fails

I am running a HPE ProLiant ML350 Gen9 with a SAS Raid controller that came with the system. For some context, I was running PVE 7.4, and then I had a drive failure. Decided to upgrade to some larger drives and move to a RAID 1+0 array, as well as move to the latest version of Proxmox. The entire install process works fine, and PVE sees the logical volume. But upon reboot, the system will say that there are no bootable disks found. Entering the one-time boot menu, I can see "proxmox" as an...

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