Re: Kernel compilation problem
On Wed 01 Aug 2018 at 23:37:33 (-0600), Taren wrote:
> I'm running Stretch, with kernel 4.9.0.7, and am trying to compile a
> new kernel (preferably 4.17.11) into which I can boot.
> The kernel builds successfully, but whenever I try booting into the
> new kernel, I end up in emergency mode, with the error
>
> Unit dev-disk-by\x2duuid-<uuid>.device has failed.
>
> The result is timeout.
>
> This device is anmd device, with two mirrors (each 2.7T in size).
> The submirrors are present when I boot into 4.9.0.7 (installed when
> the system was built).
> However, they do not appear to be visible under any kernel which I
> build and try to boot into.
>
> I've tried setting LBDAF in the kernel configuration, but that
> requires that a 32bit kernel be built (and x64 deselected), and I'm
> running on an AMD 8350 chip, which is x86_64.
> Kernel 4.9.0.7 does not have LBDAF set (and x64 is set), yet it's
> able to see my 2.7T drives, and my raid device mounts with no
> problem.
I think this is a red herring. 32bit kernels need LBDAF for large
disks because they have to be told to use 64bit addressing for
them. Obviously 64bit kernels don't need telling, so that option
is made unavailable.
> Would someone point me in the correct direction for configuring a
> new kernel, so that my 2T+ drives are visible?
In the absence of other replies, I can only suggest
(a) comparing /boot/config-4.9.0-7-amd64 with the one you've
built to see whether something is missing,
(b) compare the output of lsinitramfs /boot/initrd.img-4.9.0-7-amd64
with the one you've built to see likewise.
I'm assuming with (b) that the disks have to be found by using the
initramfs before the system can continue booting with the filesystem
contained on those disks.
Cheers,
David.
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