[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: EFI NVMe Grub does not see any disk

From: Andrei Borzenkov
Subject: Re: EFI NVMe Grub does not see any disk
Date: Wed, 19 Apr 2017 21:09:28 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

19.04.2017 20:31, Manuel Lauss пишет:
> Hi Andrei,
> On Wed, Apr 19, 2017 at 7:15 PM, Andrei Borzenkov <address@hidden> wrote:
>> 19.04.2017 14:47, Manuel Lauss пишет:
>>> Hello,
>>> I'm trying to get grub running on an EFI system which only has a NVMe disk.
>>> My problem is that when grub is launched by EFI (from the ESP), it
>>> does not see any disks at all,
>>> 'ls' just prints "(proc)" and nothing more.  Is there a way to get
>>> grub to recognize the disk
>>> the firmware has loaded it from?
>>> It's installed this way, /boot/efi is /dev/nvme0n1p2, which is the
>>> ESP. Version is 2.02_rc2
>>> grub-install --efi-directory=/boot/efi --no-nvram --target=x86_64-efi
>>> --compress=xz --themes="breeze" /dev/nvme0n1p2
>> GRUB relies on EFI for disk access and needs BlockIO protocol on device
>> so it can work with it. It may be that EFI NVMe driver on your system
>> does not implement it. Can you boot EFI shell on your system? This could
>> be used to verify what protocols are present for which device.
> Yes EFI Shell is available, and can be used to e.g. start the grub efi binary
> on the nvme device just fine. 

Could you run

dh -d

in EFI shell and send me result? You can redirect output to file on ESP
using standard syntax

dh -d > dh.out

>  Is there a special grub module required to
> get EFI BlockIO Protocol support?

You misunderstand. GRUB relies on and requires BlockIO protocol to be
provided by platform driver. But NVMe device in principle is not
required to implement it - EFI specification defines another protocol
specifically for NVMe. EFI shell is (likely) using Simple File System
protocol that can be implemented on top of anything.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]