I just wiped FreeBSD from my system and installed a copy of the latest version of Clear Linux instead. It was a bit tricky getting the partitions correct by advanced installation, but it did complete successfully. However, on reboot GRUB2 still loads with Windows 10 and Manjaro Linux, and no Clear Linux. I can boot into both Windows 10 and Manjaro just fine, and am hoping I can simply add an entry to custom_40 for Clear Linux.
Is this possible? Can GRUB2 boot Clear Linux? I have updated grub from within Manjaro, and os-prober does detect the correct install path and name of Clear Linux, but it does not add an entry automatically.
What is the best way to triple boot these three systems with the least frustration?
(Here is a copy of my current fdisk read-out. The order is Windows, Manjaro, Clear Linux.)
Device Start End Sectors Size Type
/dev/sda1 2048 923647 921600 450M Windows recovery environment
/dev/sda2 923648 1128447 204800 100M EFI System
/dev/sda3 1128448 1161215 32768 16M Microsoft reserved
/dev/sda4 1161216 279279615 278118400 132.6G Microsoft basic data
/dev/sda5 441071616 441362431 290816 142M EFI System
/dev/sda6 441362432 441864191 501760 245M Linux swap
/dev/sda7 497672192 498184191 512000 250M Linux swap
/dev/sda8 307951616 441071615 133120000 63.5G Linux filesystem
/dev/sda9 442376192 497672191 55296000 26.4G Linux root (x86-64)