Based on my understanding,
Generally, no - you can't boot from a software RAID volume because the BIOS/UEFI/etc don't know anything about it. Your OS bootloader file might get striped across multiple physical drives and even if the BIOS/UEFI/etc could find the beginning of it (say if it happened to start in the expected location), it would have no idea how to find the rest.
One exception sometimes is software RAID-1 - Windows will let you set this up for your boot drive. If the first disk dies, you can have the system boot from the other. But again, since the BIOS/UEFI/etc aren't aware they can't take action automatically. If the first drive gets corrupted, the system may well just hang on boot and there would be no automatic failover to the remaining good drive.
Thanks for your understanding.
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