Netmount does not start [resolved]

js-x.com · Last edited by js-x.com on Wed Jun 08, 2005 11:27 am; edited 5 times in total

I've been through the install 2 times now:
- first time I didn't set up the hard drives for raid as i was installing :oops:

,
- second time I set up the raid levels on the 'fdisk' step.

When I rebooted, the message came up:
"Disk boot failure, insert system disk and press enter".

So I booted with the install cd. I noticed that the /dev/md0 {1 and 2} did not appear.

Is this install toast?

The grub-install would not work "/dev/md0: not found or not a block device", so i did the manual method:
> grub
find /boot/grub/stage1
{listed all 4 harddrives - as i set up boot for raid level 1 on for disks}
device (hd0) /dev/sda
root (hd0,0)
setup (hdo)

This seemed to have worked.

Any hints on where I went wrong and if I can resurect the install - or do I need to start over?

Thanks for any pointers.

Added/Edited:
Edied 2nd time - forgot to list modprobe raid5
Here is blow by blow install steps

NeddySeagoon · Posted: Sun Jun 05, 2005 8:10 pm Post subject:

js-x.com,

Your install is probably OK but that

js-x.com · Posted: Sun Jun 05, 2005 8:27 pm Post subject:

NeddySeagoon · Posted: Sun Jun 05, 2005 8:48 pm Post subject:

js-x.com,

You need udev, hotplug and coldplug. Get your box up on the liveCD and check

cyrillic · Posted: Sun Jun 05, 2005 9:32 pm Post subject: Re: Installing with RAID

js-x.com · Posted: Tue Jun 07, 2005 12:08 am Post subject:

As ya'll [my texas drawl there

] have advised, I have tried again from scratch making adjustments.

I have altered the hard drive set up so that the BIOS can now detect and boot to the grubloader

- A side note is that the motherboard I am using has 8 SATA drive connections, and only the first 4 are bootable *shrug*

I installed a normal IDE harddrive and it is mounted as /dev/hda
I set it up with fdisk to be the bootable drive :
> fdisk /dev/hda
n/p/1//+32M/a/1/w/ {"/" denoting enter}

I then set up my 4 SATA drives on the SATA connectsion 1,2,3,4 from the motherboard/BIOS perspective.
- 2 partions each - both raid-level 5: swap, and /

When I boot the machine, the Grub loader does load and does give me 30 seconds to choose the kernel

- hey wow ! big improvement :hurray:
but it then yeilds the following: :sad:

Kernel panic - not syncing : VFS : Unable to mount root fs on unknown block (1,0)

From my searching there are a couple of possibilites. I followed the instructions to not use genkernel, but to do it 'manually'.
From the instructions when you do it manually, you do not create an initrd file. So I did not, and I did not put a line for one in the grub.conf file.
I supose this was an error, and I should have done the command "mkinitrd /boot/file.img 2.6.11"? Some places show an "-o" option.

So I then used the install cd to reboot, and i wanted to chroot back into the newly installed system...
but the /dev/md0 and /dev/md1 are not listed in there any longer.

Question 1: How do I chroot back into the installed system?
- I would suppose I would do "chroot /mnt/gentoo /bin/bash" after I get the "mount /dev/md1 /mnt/gentoo" to work, but with the device "md0 and md1" not available, I am not sure what to do. [all of the other /dev's are there like /hda1 and /sda1 /sda2 etc]

cyrillic · Posted: Tue Jun 07, 2005 1:24 am Post subject:

js-x.com · Posted: Tue Jun 07, 2005 2:13 am Post subject:

Thanks for the info!

-----
Expanding on trying to mount the "md0" and "md1":
I have booted fresh from the install cd, and first thing tried this:
# mdadm --assemble /dev/md0 --auto=yes /dev/sd[abcd]1
# mdadm --assemble /dev/md1 --auto=yes /dev/sd[abcd]2

Both result in these error message:
mdadm: error opening /dev/md0 : no such device or address
mdadm: error opening /dev/md1 : no such device or address

But I noticed that the /dev/md0 and /dev/md1 now exists [ls /dev]

so I tried to mount it
# mount /dev/md1 /mnt/gentoo

This gave an error:
mount: /dev/md1 isnot a valid block device

Is there any other information I can post that might help?

<<< edit start >>>
I forgot to metion that there is no file: /proc/mdstat

<<<<<< edit again start >>>>>>>
i needed to do a "modprobe raid5" to start with.
after that... as you have suggested it did work! thank you.

now to try the modification to the grub conf file.

thanks :wink:

<<<<<< edit again end >>>>>>>

<<< edit end >>>

Thanks again for your help

_________________
Cheers.

--Mike Robb
http://js-x.com/
[Gentoo: AMD-64 3800, 2gigram, Raid-5 S-ATA + 1 IDE, Radeon-X300-SE(128MB PCIe)]
[Gentoo: P4 dual 3ghz, 1.5gigram, S-ATA + 1 IDE, GeForce 6200 (AGP 8x 128MB)]
[Smoothwall: P3, 256Mram, 1 IDE]

js-x.com · Posted: Tue Jun 07, 2005 2:48 am Post subject:

If nothing else today I've learned how to re-mount the raid drives

and I rate that as a major success - thank you very much...

but continuing on

I have edited the grub.conf file

js-x.com · Posted: Tue Jun 07, 2005 11:29 am Post subject:

I went back and looked at the compile kernel options and found I incorrectly selected the RAID stuff as "module".
I've made this fix and am now re-compiling the kernel.

how much must i re-do : everything after this step in the instructions?

thanks everyone
_________________
Cheers.

--Mike Robb
http://js-x.com/
[Gentoo: AMD-64 3800, 2gigram, Raid-5 S-ATA + 1 IDE, Radeon-X300-SE(128MB PCIe)]
[Gentoo: P4 dual 3ghz, 1.5gigram, S-ATA + 1 IDE, GeForce 6200 (AGP 8x 128MB)]
[Smoothwall: P3, 256Mram, 1 IDE]

NeddySeagoon · Posted: Tue Jun 07, 2005 4:08 pm Post subject:

js-x.com,

Just install the kernel. Use the same name as you did before.
Since the old one is broken, you won't want to get back to it.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

cyrillic · kernel /kernel-2.6.11-gentoo-r7 root=/dev/md1

You should trim your kernel line down to this, because all the other stuff is for genkernel / initrd.

js-x.com · Posted: Wed Jun 08, 2005 12:17 am Post subject:

Thanks both. I have updated the kernel and also the grub.conf file.

Upon boot I can see it gets further and then it Panics again.