01.06.2016 12:38, Николай Сулейманов пишет:
> I’ve set up grub with the following config:
>
>
> set default=tftp
> set fallback=sysrcd32
fallback value must be numeric (list of numbers). I believe it had been
discussed, we need to find backward compatible way to extend it. So far
"fallback" is really used only by legacy grub menu parser.
> set timeout=7
>
> insmod gzio
> insmod part_gpt
> insmod ext2
> set root='hd0,gpt3'
> search --no-floppy --set=root --fs-uuid 12345678-1234-1234-1234-123456123456
>
> menuentry 'TFTP boot' --id tftp {
> insmod net
> insmod tftp
> set net_default_server=10.9.8.7
> net_bootp
> linux (tftp)/rescue32 setkmap=us nonm scandelay=1
> initrd (tftp)/initram.igz
> }
>
> menuentry 'Custom SystemRescueCd x86' --id sysrcd32 {
> loopback loop /sysrcd.iso
> linux (loop)/isolinux/rescue32 isoloop=sysrcd.iso
> initrd (loop)/isolinux/initram.igz
> }
>
>
> But when grub fails at ‘tftp’ menuentry, is writes ‘Failed to boot both
> default and fallback entries’. I’ve tried to replace the IDs with numbers 0
> and 1 for default and fallback entries respectively, but that did not help.
It works for me. I tested with numerical "fallback" and it correctly
boots using fallback entry. I tested with non-existing file names, so
that both menu entries referred to disk, no network.
Start with making sure which menu entries are executed. Add something like
"echo $1"
sleep 5
to each so it prints title when executing it.
> If I change the iso file name to a non-existing one, then make ‘sysrc32’
> the default and tftp the fallback, grub shows the same error anyway.
>
> # grub2-install --version
> grub2-install (GRUB) 2.02~beta3
I tested under openSUSE Tumbleweed which is usign 2.02~beta3.
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