I've read through different documents describing dual-boot configuration Solaris+Linux, however I'm still struggling with it.

I first installed Fedora12, and then OracleSolaris 11.2, which of course installed its own copy of grub2. Here is what partitions I have (reported by gparted):

Partition table GPT
/dev/sda1 rootFS ext4
/dev/sda2 linux-swap
/dev/sda4 bios_grub
/dev/sda3  solaris rpool

Now I want be able to boot into the linux from Solaris' grub menu, therefore I added in /rpool/boot/grub/custom.cfg:

menuitem "Fedora 12" {
    insmod part_gpt
    insmod chain
    search --no-floppy --fs-uuid --set=root 6e45cbca-b615-41e3-ab4e-e70271b0452c
    chainloader --force +1

Now I do see two menu items in solaris' grub menu, Oracle Solaris and Fedora12, but the latter fails to boot, saying "command chainload unknown".

What am I doing wrong, and how can I achieve dual boot?

UPDATE Could it be that Solaris doesn't have good support of ext4 partitions? For example, http://www.unix.com/solaris/225165-unable-mount-ext4-filesystem-created-ubuntu-solaris-11-a.html says so, but it dates to 2013.

UPDATE2 It should be chainloader not chainload Also I added search command to find a partition with specific UUID (the same as defined in Fedora's grub menu), and assign it it root. But still I'm getting error when try to boot Fedora:

error: invalid signature

I suspect it doesn't see an actual boot record?

1 Answer 1


I was able to fix the dual-boot. Actually I installed linux's grub in /dev/sda1, and chainloader was able to pick up fedora's boot; I slightly modified my /rpool/boot/grub/custom.cfg:

menuitem "Fedora 12" {
    insmod part_gpt
    insmod chain
    set root=(hd0,gpt1)
    chainloader +1

It also helped carefully re-read the following article at oracle's blog https://blogs.oracle.com/Hartmut/entry/dual_boot_oracle_solaris_11

  • so are you booting both systems from Fedora GRUB or Solaris GRUB? Also, can you post the custom configuration you use to boot second OS? Thx.
    – Igor
    Mar 26, 2017 at 5:14

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.