[ale] Setting up a triple boot system

[Trey Sizemore]

Hi Ale'rs-

I'm trying to get a linux triple-boot system setup with three SSDs, one
distro on each.  However, I'm not getting the option to boot all three,
and I suspect it may be my ignorance or UEFI.

I had installed Fedora 25 first, followed by openSUSE Tumbleweed.  After
which, I could boot and grub2 would display both Fedora and openSUSE to
boot.

I then added Ubuntu 17.04 and had it install the boot loader on
/dev/sda.  One that was done and a reboot occurred, Ubuntu's grub2
displays Ubuntu and Fedora, but not openSUSE.

Going into the BIOS and changing the disk boot order to UEFI/openSUSE
allows openSUSE's grub2 to give the (expected) option of openSUSE and
Fedora.

I then booted into openSUSE and ran 'grub2-mkconfig' (which appeared to
pick up the Ubuntu install) and then 'grub2-install /dev/sda' but upon
rebooting, not change (only Fedora and openSUSE given as options, no
Ubuntu).

HELP!! ;-)

Here is the output of 'fdisk -l'  Thanks for any help!

linux-n5ml:/home/trey # fdisk -l
Disk /dev/sda: 223.6 GiB, 240057409536 bytes, 468862128 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: EA38305F-9CDA-4238-9D21-E0D3FFF7B2DB

Device         Start       End   Sectors   Size Type
/dev/sda1       2048 195311615 195309568  93.1G Linux filesystem
/dev/sda2  195311616 468860927 273549312 130.4G Linux filesystem


Disk /dev/sdb: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: A75EA335-D659-4D1A-946E-1DCD177919DE

Device       Start       End   Sectors   Size Type
/dev/sdb1     2048    411647    409600   200M EFI System
/dev/sdb2   411648   2508799   2097152     1G Linux filesystem
/dev/sdb3  2508800 500117503 497608704 237.3G Linux LVM


Disk /dev/sdc: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: F55B687A-4B55-4388-AD65-FE1FF1F36A99

Device        Start       End   Sectors   Size Type
/dev/sdc1      2048    321535    319488   156M EFI System
/dev/sdc2    321536   4530175   4208640     2G Linux filesystem
/dev/sdc3   4530176  88422399  83892224    40G Linux filesystem
/dev/sdc4  88422400 500117503 411695104 196.3G Linux filesystem


Disk /dev/mapper/fedora-swap: 7.9 GiB, 8430551040 bytes, 16465920 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sdd: 116.5 GiB, 125124476928 bytes, 244383744 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 8FEA2DC2-8A13-44E2-A1DB-E9F07D6138F8

Device     Start       End   Sectors   Size Type
/dev/sdd1   2048 244383710 244381663 116.5G Linux filesystem


Disk /dev/sde: 15 GiB, 16106127360 bytes, 31457280 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xc3072e18

Device     Boot Start      End  Sectors Size Id Type
/dev/sde1  *       32 31457279 31457248  15G  c W95 FAT32 (LBA)


Disk /dev/mapper/fedora-home: 179.4 GiB, 192656965632 bytes, 376283136
sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/fedora-root: 50 GiB, 53687091200 bytes, 104857600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes