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Mike Hunt
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Joined: 19 Jul 2009
Posts: 5287
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 Posted: Thu Jan 21, 2010 2:13 am Post subject: |
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Ok then, check for these: | Code: | # egrep '^[^#].*(PATA|SCSI)' /mnt/gentoo/usr/src/linux/.config
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_PROC_FS=y
CONFIG_SCSI_WAIT_SCAN=m
CONFIG_PATA_ATIIXP=m |
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bgcamroux
n00b
Joined: 20 Jan 2010
Posts: 7
Location: Calgary, AB, Canada
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| Posted: Thu Jan 21, 2010 2:45 am Post subject: |
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| Mike Hunt wrote: | Ok then, check for these: | Code: | # egrep '^[^#].*(PATA|SCSI)' /mnt/gentoo/usr/src/linux/.config
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_PROC_FS=y
CONFIG_SCSI_WAIT_SCAN=m
CONFIG_PATA_ATIIXP=m |
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I checked, and the last one was not there at all. Went into make menuconfig for the kernel and put it in.
When I compiled the kernel, I notice this message at the end:
| Code: | LD arch/x86/boot/setup.elf
OBJCOPY arch/x86/boot/setup.bin
OBJCOPY arch/x86/boot/vmlinux.bin
BUILD arch/x86/boot/bzImage
Root device is (8, 2)
Setup is 12460 bytes (padded to 12800 bytes).
System is 4007 kB
CRC c9cc78cf
Kernel: arch/x86/boot/bzImage is ready (#2)
Building modules, stage 2.
MODPOST 4 modules |
What's it mean that root device is (8, 2)? Why is that? I'm going to give it a try with the new kernel, but won't hold my breath  Any thoughts? |
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Mike Hunt
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Joined: 19 Jul 2009
Posts: 5287
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| Posted: Thu Jan 21, 2010 2:59 am Post subject: |
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| bgcamroux wrote: | | Code: | VFS: Cannot open root device "sda2" or unknown-block (8,2)
Append correct "root=" boot option |
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Well, we know that it's the same as what this says. It means that your / in on device /dev/sda2
Remember to run make modules_install, and check that your /boot is mounted before copying your new kernel over.
Then exit the chroot, unmount your partitions and reboot.
Last edited by Mike Hunt on Thu Jan 21, 2010 3:01 am; edited 1 time in total |
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bgcamroux
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Joined: 20 Jan 2010
Posts: 7
Location: Calgary, AB, Canada
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| Posted: Thu Jan 21, 2010 3:00 am Post subject: |
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| Quote: | | I'm going to give it a try with the new kernel, but won't hold my breath |
Okay, so I've rebooted and this is what I see on my screen at the moment:
| Code: | [ 1.469398] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,2)
[ 1.469537] Pid: 1, comm: swapper Not tainted 2.6.31-gentoo-r6colobus #2
[ 1.469625] Call Trace:
[ 1.469715] [<ffffffff81562772>] panic+0xa0/0x14b
.................................... ? printk_all_partitions+0x1de/0x1f0
.................................... ? sys_mount+0xab/0xc1
.................................... mount_block_root+0x1d3/0x1ea
.................................... mount_root+0x79/0x99
.................................... prepare_namespace+0x170/0x19d
.................................... kernel_init+0x1a9/0x1b9
.................................... child_rip+0xa/0x20
.................................... ? kernel_init+0x0/0x1b9
.................................... ? child_rip+0x0/0x20 |
(The series of dots are addresses, I'm guessing, just like what's after the Call Trace: line.) Does this mean anything to anyone? Note that previously it had said "Append correct "root=" boot option", which is no longer there.... |
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Mike Hunt
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Joined: 19 Jul 2009
Posts: 5287
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| Posted: Thu Jan 21, 2010 3:09 am Post subject: |
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Ok, then one more to check: | Code: | # grep BLK_DEV_SD /usr/src/linux/.config
CONFIG_BLK_DEV_SD=y |
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bgcamroux
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Joined: 20 Jan 2010
Posts: 7
Location: Calgary, AB, Canada
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| Posted: Thu Jan 21, 2010 3:21 am Post subject: |
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| Mike Hunt wrote: | Ok, then one more to check: | Code: | # grep BLK_DEV_SD /usr/src/linux/.config
CONFIG_BLK_DEV_SD=y |
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I get the same result. I really am at a loss  |
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Mike Hunt
Watchman
Joined: 19 Jul 2009
Posts: 5287
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| Posted: Thu Jan 21, 2010 3:31 am Post subject: |
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Well ok then, let's go at it another way.
Pastebin the kernel.config on http://pastebin.com
and post the URL here,
and paste the output of lspci -n here please.
BTW, are you sure that you formatted /dev/sda2 as ext3 ? Check with blkid /dev/sda2 |
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DONAHUE
Advocate
Joined: 09 Dec 2006
Posts: 4341
Location: Goose Creek SC
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| Posted: Thu Jan 21, 2010 3:51 am Post subject: |
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On reboot at the grub menu enter the edit mode and edit the kernel line to root=/dev/sdb2 and try to boot. If that fails repeat to try root=/dev/sdc2. Possible the cd and the install kernels set different device names. Can you provide the lines above the vfs message if the above fails? Camera or pen and paper.
good kernel panic problem summary
Fixed link tag, it had been lacking the necessary '='. -- desultory |
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Mike Hunt
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Joined: 19 Jul 2009
Posts: 5287
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| Posted: Thu Jan 21, 2010 1:39 pm Post subject: |
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In fact, if there is only one Gentoo installation only on that machine and no other operating systems, then it should boot without an appended root=/dev/something on the kernel line. This is tested and known to work with grub in cases when there is only the 1 Gentoo OS. | Code: | # cat grub.conf
default 0
timeout 15
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
title Gentoo Colobus
root (hd0,0)
kernel /boot/kernel-colobus |
And look at this post for a very good explanation of how to know what to select/not select in the kernel configuration. |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 27780
Location: 56N 3W
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| Posted: Thu Jan 21, 2010 7:10 pm Post subject: |
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bgcamroux,
This part of your error message | Code: | | VFS: Unable to mount root fs on unknown-block(8,2) |
refers to the kernel major,minor device numbers that the kernel is trying to mount as root. 8,3 means /dev/sda3. See the file /usr/src/linux/Documentation/devices.txt
As you have sensible numbers there, we can tell that the kernel can find your drive, so your hardware set up in the kernel is ok.
You get numbers like (0,0) or (0,2) if its not ... but the kernel cannot read the filesystem found on /dev/sda3
The filesystem driver must be compiled as <*> since the kernel cannot load modules until the root filesystem is mounted.
What command did you use to make a filesystem on /dev/sda3 and is that filesystem made in your kernel ?
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NeddySeagoon
Computer users fall into two groups:-
those that do backups
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robs227
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Joined: 08 Nov 2009
Posts: 34
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| Posted: Thu Jan 21, 2010 8:56 pm Post subject: |
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Hi I'm a little unclear about the framebuffer portion of grub. My kernel is built off one of Pappy's Seeds and I added the framebuffer support for my video card (UniChrome Pro), I also added in the the section video= to the end of the kernel command which is said to do in the install guide for framebuffer support. But I do not get the bootsplash screen but rather text based grub option list. Here is what my grub.config looks like:
Graphics card is build into my epia cn10000eg MoBo it's CN700/P4M800 Pro/P4M800 CE/VN800 [S3 UniChrome Pro]
http://dpaste.com/148605/
EDIT hold on just noticed that splash was commented out. Sorry |
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ROram3
n00b
Joined: 14 Jan 2010
Posts: 1
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| Posted: Fri Jan 22, 2010 1:04 am Post subject: Boot from jfs partition? |
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| I formatted the boot partition in JFS, and included all the JFS stuff in the kernel options. It wont boot. Am I doing something fundamentally wrong? Can I boot from a JFS partition? |
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cach0rr0
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Joined: 13 Nov 2008
Posts: 3849
Location: Houston, Republic of Texas
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NeddySeagoon
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Joined: 05 Jul 2003
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Location: 56N 3W
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| Posted: Fri Jan 22, 2010 8:27 pm Post subject: |
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ROram3,
JFS should work - grub has a jfs_stage1.5 file
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NeddySeagoon
Computer users fall into two groups:-
those that do backups
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Thaidog
Veteran
Joined: 19 May 2004
Posts: 1036
Location: Hilton Head, SC
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| Posted: Thu Feb 04, 2010 5:52 am Post subject: Grub - Error 15: File not found SOLVED |
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Ok so it's been a while since I installed grub and I am not sure if I did something wrong the first time because I got a kernel hang. My disk partitions are simple:
/dev/hda1 - /boot
/dev/hda2- /
In gub I first did:
grub> root (hd0,0)
grub> setup (hd0)
This gave me no errors but the system hung at boot - now I am back in and I tried this:
| Code: |
grub> root (hd0,1)
Filesystem type is xfs, partition type 0x83
grub> setup (hd0)
Checking it "/boot/grub/stage" exists... no
Checking if "/grub/stage1" exists... no
Error 15: File not found
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Did I do it right the first time or is something else wrong here?
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Last edited by Thaidog on Thu Feb 04, 2010 9:26 am; edited 1 time in total |
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EzInKy
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Joined: 11 Oct 2002
Posts: 1734
Location: Kentucky
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| Posted: Thu Feb 04, 2010 5:56 am Post subject: |
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Is /boot mounted? You can of course physically check for the existence of those files yourself.
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Thaidog
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Location: Hilton Head, SC
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| Posted: Thu Feb 04, 2010 5:58 am Post subject: |
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| EzInKy wrote: | | Is /boot mounted? You can of course physically check for the existence of those files yourself. |
You mean back in the install chroot now? Yes.... and the first grub session made the stage1 & 2 files no problem.
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EzInKy
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| Posted: Thu Feb 04, 2010 6:02 am Post subject: |
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Does...
...show the files as being present?
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Thaidog
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| Posted: Thu Feb 04, 2010 6:03 am Post subject: |
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| EzInKy wrote: | Does...
...show the files as being present? |
Yeap!
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EzInKy
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Location: Kentucky
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| Posted: Thu Feb 04, 2010 6:16 am Post subject: |
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Well, as long as you confirmed the files were there and ran grub from within your chroot I'm scratching my head along with you. XFS is an interesting choice for a system drive though.
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Thaidog
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| Posted: Thu Feb 04, 2010 6:24 am Post subject: |
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| EzInKy wrote: | | Well, as long as you confirmed the files were there and ran grub from within your chroot I'm scratching my head along with you. XFS is an interesting choice for a system drive though. |
Yeah I use it for the root drive and usually ext for the boot drive. XFS sometimes has trouble with grub as the boot partition. I am thinking this is a kernel config issue... it is a virtual box vm so maybe I got the kernel drivers for the hd/chipset wrong. I'll keep hacking...
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Mike Hunt
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Joined: 19 Jul 2009
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| Posted: Thu Feb 04, 2010 6:52 am Post subject: |
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Run: | Code: | grub
grub> find /grub/stage1
(hd0,0)
grub> quit |
Whatever it outputs is what you need as root(hdX,X) in grub.conf
Now look at
and take note of the exact name of the kernel, it is what you need in grub.conf
Edit /boot/grub/grub.conf
Reboot |
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Thaidog
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| Posted: Thu Feb 04, 2010 8:48 am Post subject: |
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It turned out that I compiled the wrong hdd driver. That is good info though Mike I will remember that! 
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NeddySeagoon
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| Posted: Thu Feb 04, 2010 11:12 am Post subject: |
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Merged above thread 9 posts here
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NeddySeagoon
Computer users fall into two groups:-
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hansman
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Joined: 06 Feb 2010
Posts: 7
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| Posted: Sat Feb 06, 2010 3:55 am Post subject: grub error: filesystem type unknown |
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Hello!
I make everything like in the gentoo handbook and get at "grub-install --no-floppy /dev/sda" the error message: the file /boot/grub/stage1 not read correctly
The stage1 file is in the directory /boot/grub/
So I make the manual grub installation and get following error after insert "root (hd0,0)":
Filesystem type unknown, partition type 0x83
I´m shure it´s the right partition, I have no other hard disk devices or solid state devices so it has to be sda1 = hd0,0 (also grub finds with pressing "TAB" no other devices).
I make 3 partitions
The first is my boot partition 32MB big and bootable. ex2 filesystem.
fstab:
/dev/sda1 /boot ext2 defaults 1 2
/dev/sda2 none swap sw 0 0
/dev/sda3 / ext3 noatime 0 1
/dev/cdrom.....
grub.conf:
....
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
title Gentoo
root (hd0,0)
kernel /boot/kernel-genkernel-x86_64-2.6.31-gentoo-r6 root=/dev/ram0 init=/linuxrc ramdisk=8192 real_root=/dev/sda3
initrd /boot/initramfs-genkernel-x86_64-2.6.31-gentoo-r6
(the kernels files are at /boot and names are right)
My system:
250 GB usb hard disk
gentoo (amd64) minimal boot cd
Can it has something to do with the drivers for the exernal usb hard disk?
Please, please help me. I´m new at gentoo and working about 6 hours to resolve the problem and don´t get it. |
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Installing Gentoo
