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StupidBunny
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Joined: 08 Nov 2015
Posts: 4
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 Posted: Sun Nov 08, 2015 5:35 am Post subject: "Could not find the root block device in ." |
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I've got a laptop (Dell XPS 12, with amd64 hardware), currently running Windows 10, which I am trying to install Gentoo alongside. I've started out using this tutorial, which easily got me as far as shrinking my primary Windows partition; creating a minimal installation using the latest (20150924) disk image, on both a CD and USB key for good measure; and disabled UEFI boot, enabled Legacy boot, and changed the boot order.
The problem I'm having now is that it can't mount either the CD or USB key, because it can find neither. It gets me to a point where it tells me:
| Code: | ...
!! Media not found
!! Could not find CD to boot, something else needed!
>> Determining root device...
!! Could not find the root block device in .
!! Please specify another value or:
!! - press Enter for the same
!! - type "shell" for a shell
!! - type "q" to skip... |
When I look at the list of media it tries mounting, it has, among other things, /dev/sda1-5, but does not find sdb, sdc, etc. When I type shell I get into an ash (not bash) shell, and indeed the USB key/CD does not appear to show up in /dev.
I checked, and a blank file called livecd is present at the root on my USB stick. I have tried the scandelay=10 trick, to no avail. I've found a number of suggested fixes online, but they either don't work or are for slightly different problems. Does anybody smarter than me have any ideas what the problem could be, and how I may fix it? |
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Keruskerfuerst
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Joined: 01 Feb 2006
Posts: 2289
Location: near Augsburg, Germany
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54234
Location: 56N 3W
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| Posted: Sun Nov 08, 2015 1:11 pm Post subject: |
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StupidBunny,
Welcome to Gentoo.
It appears that the kernel you have booted cannot find the root filesystem.
Not all CDs install on USB devices properly.
As Keruskerfuerst says, try SystemRescueCD. Its even Gentoo based.
_________________
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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toito
n00b
Joined: 28 Oct 2004
Posts: 12
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| Posted: Wed Nov 18, 2015 8:44 am Post subject: |
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In the last days I tried to install Gentoo from USB key, from LiveCD and from SystemRescueCD, following the handbook and always obtained the same result:
Could not find the root block device in .
Any ideas? Please |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54234
Location: 56N 3W
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| Posted: Wed Nov 18, 2015 5:20 pm Post subject: |
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toito,
Did the error | Code: | | Could not find the root block device in . |
appear when you booted from the CD/USB or when you tried to boot your own install?
Is this an install on real hardware or as a guest in a virtual machine?
If its a guest, whick VM are you using.
_________________
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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toito
n00b
Joined: 28 Oct 2004
Posts: 12
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| Posted: Wed Nov 18, 2015 5:31 pm Post subject: |
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This error appear when I try to boot the new instalation on real hardware (netbook Acer).
Regards. |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54234
Location: 56N 3W
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| Posted: Wed Nov 18, 2015 8:51 pm Post subject: |
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toito,
This means that for some reason, your kernel cannot find your hard drive controller.
There are a few reasons.
The hard drive controller code in the kernel is missing or incomplete.
You made the code as a loadable kernel module, rather than built in but are not using an initrd to provide the module.
Tell us how you configured and installed your kernel.
Show us the output of lspci.
Show us the kernel .config file /usr/src/linux/.config
Show us your boot loader configuration file. Probably /boot/grub/grub.cfg
You will need to use wgetpaste for the kernel .config as its for too big to fit into a post.
_________________
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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toito
n00b
Joined: 28 Oct 2004
Posts: 12
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| Posted: Thu Nov 19, 2015 1:35 pm Post subject: |
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To configured and installed the kernel I used:
| Code: | | genkernel --menuconfig all |
Changing only "Processor family" to Atom and adding some modules to wireless.
| Code: | sysresccd / # lscpu
Architecture: i686
CPU op-mode(s): 32-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 2
Core(s) per socket: 1
Socket(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 28
Model name: Intel(R) Atom(TM) CPU Z520 @ 1.33GHz
Stepping: 2
CPU MHz: 1333.000
CPU max MHz: 1333.0000
CPU min MHz: 800.0000
BogoMIPS: 2659.94
Virtualization: VT-x
L1d cache: 24K
L1i cache: 32K
L2 cache: 512K |
| Code: | sysresccd / # lspci
00:00.0 Host bridge: Intel Corporation System Controller Hub (SCH Poulsbo) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation System Controller Hub (SCH Poulsbo) Graphics Controller (rev 07)
00:1b.0 Audio device: Intel Corporation System Controller Hub (SCH Poulsbo) HD Audio Controller (rev 07)
00:1c.0 PCI bridge: Intel Corporation System Controller Hub (SCH Poulsbo) PCI Express Port 1 (rev 07)
00:1c.1 PCI bridge: Intel Corporation System Controller Hub (SCH Poulsbo) PCI Express Port 2 (rev 07)
00:1d.0 USB controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB UHCI #1 (rev 07)
00:1d.1 USB controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB UHCI #2 (rev 07)
00:1d.2 USB controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB UHCI #3 (rev 07)
00:1d.7 USB controller: Intel Corporation System Controller Hub (SCH Poulsbo) USB EHCI #1 (rev 07)
00:1f.0 ISA bridge: Intel Corporation System Controller Hub (SCH Poulsbo) LPC Bridge (rev 07)
00:1f.1 IDE interface: Intel Corporation System Controller Hub (SCH Poulsbo) IDE Controller (rev 07)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
03:00.0 Ethernet controller: Qualcomm Atheros AR242x / AR542x Wireless Network Adapter (PCI-Express) (rev 01) |
| Code: | sysresccd / # cat /etc/fstab
# /etc/fstab: static file system information.
# <fs> <mountpoint> <type> <opts> <dump/pass>
/dev/sda1 /boot ext2 defaults,noatime 0 2
/dev/sda2 none swap sw 0 0
/dev/sda3 / ext4 noatime 0 1
#/dev/cdrom /mnt/cdrom auto noauto,ro 0 0
#/dev/fd0 /mnt/floppy auto noauto 0 0 |
My grub.cfg generated with | Code: | | grub-mkconfig -o /boot/grub/grub.cfg |
is:
| Code: | menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-75b38059-c7a7-45dc-9398-f0f7fb554cfc' {
load_video
if [ "x$grub_platform" = xefi ]; then
set gfxpayload=keep
fi
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 c052c754-de9f-49c4-ad42-4454b3f33a0d
else
search --no-floppy --fs-uuid --set=root c052c754-de9f-49c4-ad42-4454b3f33a0d
fi
echo 'Loading Linux x86-4.1.12-gentoo ...'
linux /kernel-genkernel-x86-4.1.12-gentoo root=UUID=75b38059-c7a7-45dc-9398-f0f7fb554cfc rootfstype=ext4 ro
echo 'Loading initial ramdisk ...'
initrd /initramfs-genkernel-x86-4.1.12-gentoo
} |
And the kernel .config is:
https://bpaste.net/show/f5379d38860f
Thank you very much for your interest in my problem.
Regards. |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54234
Location: 56N 3W
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| Posted: Thu Nov 19, 2015 6:15 pm Post subject: |
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toito,
Your problem is almost certainly
| Code: | | < > Intel SCH PATA support |
You need either <M> or <Y>
That's the option for your | Code: | | 00:1f.1 IDE interface: Intel Corporation System Controller Hub (SCH Poulsbo) IDE Controller (rev 07) |
| Code: | | genkernel --menuconfig all |
is the right approach. In your case, the predefined .config file left your driver out of the kernel.
Get back into your chroot and redo the | Code: | | genkernel --menuconfig all |
.
Find the | Code: | | < > Intel SCH PATA support |
setting and fix it.
Save the change when you exit menuconfig.
Hint: menuconfig has a search function. Press / and enter PATA_SCH
If it works, please file a bug against genkernel at bugs.gentoo.org, so that the devs knaw what to do to fix genkernel.
This will help both you and others with the same issue.
_________________
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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toito
n00b
Joined: 28 Oct 2004
Posts: 12
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| Posted: Fri Nov 20, 2015 1:47 pm Post subject: |
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NeddySeagoon you are the best.
Thank you very much.
I added like native Intel SCH PATA support in kernel, and work fine.
I will file a bug like you said.
Regards. |
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Installing Gentoo
