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altrent
n00b
Joined: 03 Mar 2004
Posts: 53
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 Posted: Wed Dec 23, 2015 4:18 pm Post subject: /boot on NVME? |
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Hi there,
I am the proud new owner of a Samsung 950 pro, and faced quite a few difficulties to get gentoo on it.
First, the live install CD kernel doesn't appear to have the NVME driver compiled, so I had to install gentoo from my old hard drive (still cool that it works that way). Not sure if there was any better way?
Second, I failed to install the /boot partition on the NVME drive. When grub starts (UEFI), it complains about not finding the disk. I had to resort to using my old /boot partition on my old SSD.
Wondering if anyone was successful in getting /boot on an NVME partition to work just fine?
Thanks,
| Code: |
(parted) p
Model: Unknown (unknown)
Disk /dev/nvme0n1: 488386MiB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1.00MiB 3.00MiB 2.00MiB ext2 grub bios_grub
2 3.00MiB 301MiB 298MiB fat16 boot boot, esp
3 301MiB 1301MiB 1000MiB linux-swap(v1) swap
4 1301MiB 101301MiB 100000MiB ext4 rootfs
5 101301MiB 121301MiB 20000MiB ext4 home
6 121301MiB 371301MiB 250000MiB ext4 extras
7 371301MiB 371751MiB 450MiB ntfs Basic data partition hidden, diag
8 371751MiB 371851MiB 100MiB fat32 EFI system partition boot, esp
9 371851MiB 371867MiB 16.0MiB Microsoft reserved partition msftres
10 371867MiB 488386MiB 116519MiB ntfs Basic data partition msftdata
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Keruskerfuerst
Advocate
Joined: 01 Feb 2006
Posts: 2289
Location: near Augsburg, Germany
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| Posted: Thu Dec 24, 2015 12:00 pm Post subject: |
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| To use a NVME SSD, a mainboard with a UEFI Bios including a NVME driver is nessecary. |
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altrent
n00b
Joined: 03 Mar 2004
Posts: 53
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| Posted: Thu Dec 24, 2015 9:57 pm Post subject: |
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Hi,
Unless I am misunderstanding your reply, I think I got all that is needed to use an NVME SSD.
My motherboard is an Extreme 7+ that support NVME M.2, and has the latest BIOS.
And I do run the root partition out of the NVME drive. It's just the boot partition that grub is unable to boot the kernel from.
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 46090
Location: 56N 3W
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| Posted: Thu Dec 24, 2015 10:01 pm Post subject: |
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altrent,
Grub depends on the BIOS to a great extent.
The BIOS loads grub (that's a bit of a simplification)
Then grub loads the kernel and initrd.
Where does the process break?
Does grub load and show its menu?
Which version of grub?
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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altrent
n00b
Joined: 03 Mar 2004
Posts: 53
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| Posted: Mon Dec 28, 2015 11:37 pm Post subject: |
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NeddySeagoon,
After much playing around I got it to boot from NVME. The only way it works is by adding the device location '(hd5,gpt2)' prior to the vmlinuz image. Without it grub will boot from my old /boot partition (on a SATA SSD). What's really odd is that grub reads its config from the new /boot partition (NVME), but somehow, doesn't boot the kernel from there unless explicitly told the partition location.
Thanks!
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menuentry 'Gentoo GNU/Linux 4.3.3 (from NVME)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-1b20b179-bc43-47ed-8274-46e55f9410ca' {
load_video
if [ "x$grub_platform" = xefi ]; then
set gfxpayload=keep
fi
insmod gzio
insmod part_gpt
insmod fat
set root='hd5,gpt2' # doesn't seem to have any effects
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd5,gpt2 --hint-efi=hd5,gpt2 --hint-baremetal=ahci5,gpt2 D3E1-699A
else
search --no-floppy --fs-uuid --set=root D3E1-699A
fi
echo 'Loading Linux 4.3.3-gentoo ...'
linux (hd5,gpt2)/vmlinuz-4.3.3-gentoo root=/dev/nvme0n1p4 ro init=/usr/lib/systemd/systemd # << Added device location for the kernel to load
}
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Installing Gentoo
