riza.din...@gmail.com (Riza Dindir) writes: >> bootme is used by the EFI bootloader to select the boot partition. >> If that flag isn't set, there is a heuristic to select a boot partition.
>How does the system decide which partition to select. I wanted to >understand how the system is able to boot from the NetBSD HDD when >connected via USB, and also when connected (without any other disks) >at the internal HDD sata slot (on its own) and when connected at the >DVD sata slot (on its own). Since in these cases, I was able to boot >NetBSD from the HDD. The bootloader just looks for a partition, it doesn't search the boot disk. I wouldn't rule out an UEFI bug. >I could not find biosboot in the manual pages, but there is a manual >page for the installboot utility that uses a biosboot file. gpt has a biosboot command and 'gpt set' lets you add a 'biosboot' attribute to a partition. >So since this flag is set, would it be possible that the system might >be able to boot from the HDD caddy, by only changing this flag to >"bootme"? You can try, but the only thing that 'bootme' should determine is what partition the EFI bootloader will select as default. A second disk should not have an effect.