Re: [gentoo-user] Weird harddisk problem: AHCI disks sometimes not found

[Mark Knecht]

On Thu, Mar 11, 2021 at 12:39 PM Alexander Puchmayr <
alexander.puchmayr@×××××××.at> wrote:
>
> Hi there,
>
> I have a weird harddisk detection problem which rises the questio: what
does
> the gentoo-kernel make differently than the ubuntu kernel?
>
> The system in question has 2 identical SSDs (Kingston SV300S3 60GB) and
two
> identical HDDs (older Maxtor7V300F0 300GB) , all connected to SATA/AHCI
ports;
> the HDDs are combined to a LVM-raid1 volume. SATA controller is a onboard
SB7x
> on an Asus M3A78 mainboard in AHCI mode.
>
> Only one of the two SSDs is attached at the same time to the system, the
other
> one is disconnected. One contains a gentoo installation (just updated
> yesterday), the other one an Ubuntu LTS 20.04. This allows dual-.boot by
> switching connection cables.
>
> When I connect the gentoo-SSD and boot it, BIOS finds all HDDs and the
SSD, and
> starts booting; but gentoo does not recognize at least one of the HDDs
(/dev/
> sdc missing, dmesg shows link down on Sata-Interface
> . Going back to the bios shows that even BIOS does not recognize the disk
> anymore. A full powercycle (pressing reset button is not sufficent) to
make BIOS
> to recognize the disks again.
>
> Doing the same with the Ubuntu-Disk works absolutely fine, all HDDs are
> recognized and the raid is working fine, not a single time that one of the
> disks was not recognized.
>
> Without the Ubuntu observation I'd say its a hardware problem and the old
HDDs
> are simply beyond their age, but why are they working in ubuntu and not in
> gentoo? And what is it doing with BIOS/Harddisk that even Bios does not
find it
> anymore? I need a full powercycle to make bios find it again. This
 indicates a
> gentoo kernel problem, and I have no idea where to start looking, and
AFAIK
> there's nothing much to configure a SATA/AHCI drive.
>
> Any ideas?
>
> Thanks
>         Alex
>
> PS:
> Sys-kernel/gentoo-kernel-5.4.97, default configuration
> Hardware:
> 00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] RS780 Host Bridge
> 00:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780/RS880 PCI to
PCI
> bridge (int gfx)
> 00:06.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] RS780 PCI to PCI
bridge
> (PCIE port 2)
> 00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI]
SB7x0/SB8x0/
> SB9x0 SATA Controller [AHCI mode]
> 00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI]
SB7x0/SB8x0/
> SB9x0 USB OHCI0 Controller
> 00:12.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0 USB
OHCI1
> Controller
> 00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI]
SB7x0/SB8x0/
> SB9x0 USB EHCI Controller
> 00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI]
SB7x0/SB8x0/
> SB9x0 USB OHCI0 Controller
> 00:13.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0 USB
OHCI1
> Controller
> 00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI]
SB7x0/SB8x0/
> SB9x0 USB EHCI Controller
> 00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus
Controller
> (rev 3a)
> 00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/
> SB9x0 IDE Controller
> 00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia
> (Intel HDA)
> 00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI]
SB7x0/SB8x0/SB9x0
> LPC host controller
> 00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to
PCI
> Bridge
> 00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI]
SB7x0/SB8x0/
> SB9x0 USB OHCI2 Controller
> 00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8
[Athlon64/Opteron]
> HyperTransport Technology Configuration
> 00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8
[Athlon64/Opteron]
> Address Map
> 00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8
[Athlon64/Opteron]
> DRAM Controller
> 00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8
[Athlon64/Opteron]
> Miscellaneous Control
> 01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
> RS780 [Radeon HD 3200]
> 01:05.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RS780 HDMI
Audio
> [Radeon 3000/3100 / HD 3200/3300]
> 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8111/8168/8411
> PCI Express Gigabit Ethernet Controller (rev 02)
>
>
>

I'm going to assume that you built your Gentoo kernel and have the config
file.

Ubuntu ships the config file along with whatever kernel you are running
which you can obtain with

less /boot/config-$(uname -r)

Ubuntu 'tends' to ship everything as a module and ships nearly every
module vs your Gentoo kernel where you may be building things into
the kernel. You should be able to do a diff on the two config files as
a starting point assuming you are using the same kernel version.

lsmod should give you an idea what modules are loaded for each kernel.

HTH,
Mark