Motherboard stopped recognising both bootble EFI disks as bootable. Why?
by ardabro from LinuxQuestions.org on (#6GNET)
It is 11 years old asus p8z77-v
For a long time I have two SSD-s connected to it. Both are bootable, have GPT partition table, and EFI partitions with boot and esp flags. There is Debian installed on both. Bullseye on the first one and Buster or maybe even older on the other. No issues until today.
What I did today: I removed everything from the case (in the process of building new machine), then assembled everything on bench for temporary usage. The only change is different choice and order of sata cables plugged into mb and CDROM not connected at all. There is also 3rd HDD - not bootable (I had 4 sata devices connected and now have 3 of them)
And now my motherboard refuses to boot from any of these two SSD-s. Moreover it doesn't show them for boot selection when "EFI only" is selected from compatibility-related menu in bios. Seems that it thinks they are both MBR ones and boot attempts result in "reboot and select proper boot device" message. I believe it is very unlikely that two separate drives got corrupted the same way. On the other hand I'm able to boot from usb stick, look at them in gparted, mount partitions - everything looks good (I see expected files on EFI partitions in particular). It seems that my motherboard just went mad, maybe for some security-related reasons. I'm thinking about reinstalling grub on these drives, but I'm afraid of things getting even worse.
So... the general question i why and what else could I do?
For a long time I have two SSD-s connected to it. Both are bootable, have GPT partition table, and EFI partitions with boot and esp flags. There is Debian installed on both. Bullseye on the first one and Buster or maybe even older on the other. No issues until today.
What I did today: I removed everything from the case (in the process of building new machine), then assembled everything on bench for temporary usage. The only change is different choice and order of sata cables plugged into mb and CDROM not connected at all. There is also 3rd HDD - not bootable (I had 4 sata devices connected and now have 3 of them)
And now my motherboard refuses to boot from any of these two SSD-s. Moreover it doesn't show them for boot selection when "EFI only" is selected from compatibility-related menu in bios. Seems that it thinks they are both MBR ones and boot attempts result in "reboot and select proper boot device" message. I believe it is very unlikely that two separate drives got corrupted the same way. On the other hand I'm able to boot from usb stick, look at them in gparted, mount partitions - everything looks good (I see expected files on EFI partitions in particular). It seems that my motherboard just went mad, maybe for some security-related reasons. I'm thinking about reinstalling grub on these drives, but I'm afraid of things getting even worse.
So... the general question i why and what else could I do?