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Kernel panic during grub boot

(20 posts) (4 voices)

• Started 11 years ago by hallevison
• Latest reply from christophe
• This topic is resolved

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1. 

   hallevison
   

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   Hi:

   I have been using linux for many years, but have never tried to install it. I am trying to install SliTaz from a live CD. The OS boots fine from the CD, but I am having trouble when I try to booth it from a hard drive using grub. In particular, this is what I get when the machine tries to boot.

   --

   Booting command-list

   root (hd0,0)
   File system type is ext2fs, partition type 0x83
   kernel /boot/vmlinuz-2.6.30.6-30.6-slitaz root=/dev/hda1 quiet
   [Linux-bzimage, setup=0x3000, size=0x21a850]

   EXT3-fs: hda1: couldn't mount because of unsupported optional features (240).
   Kernel panic - not syncing: VFS: Unable to mount root fs on unknown block(3,1)

   --

   Any ideas?

   Thanks - Hal.

   Posted 11 years ago #
2. 

   Aleksej
   

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   Hi,

   1) What is filesystem type in your /dev/hda1? ext2 or ext3 or ext4?

   2) Do you have /dev/hda1? Maybe, you'll try /dev/sda1 or use UUID?
   

   # blkid
   ...
   /dev/sda1: LABEL="PQSERVICE" UUID="0159-6699"
   ...

   In the menu.lst:
   

   ...
   root=UUID=0159-6699

   Posted 11 years ago #
3. 

   hallevison
   

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   Thanks for the quick reply. I will try to answer your questions, but remember I am newbie.

   My menu.lst is:

   # For booting SliTaz from : /dev/hda1
   #
   title SliTaz GNU/Linux (cooking) (Kernel vmlinuz-2.6.30-slitaz)
   root (hd0,0)
   kernel /boot/vmlinuz-2.6.30.6-slitaz root=/dev/hda1 quiet

   I am not using UUID. From what I have read it is better, but I cannot figure out how to make the initrd image.

   I am putting the new OS on an external 2.5" 500G drive (for now because I do not want to screw up the internal disk). I wanted to make 6 partitions (so I can boot several OS's). They were all formatted with mkfs.ext3. When I put the disk on another machine, which is running FC15 btw, I get:

   [root@marvin hal]# /sbin/fdisk -l

   <deleted info about the main disk>

   Disk /dev/sdb: 500.1 GB, 500107862016 bytes
   255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
   Units = sectors of 1 * 512 = 512 bytes
   Sector size (logical/physical): 512 bytes / 512 bytes
   I/O size (minimum/optimal): 512 bytes / 512 bytes
   Disk identifier: 0x6214db7d

   Device Boot Start End Blocks Id System
   /dev/sdb1 * 2048 411647 204800 83 Linux
   /dev/sdb2 411648 189155327 94371840 5 Extended
   /dev/sdb3 189155328 193349631 2097152 82 Linux swap / Solaris
   /dev/sdb4 193349632 976773167 391711768 83 Linux
   /dev/sdb5 413696 63328255 31457280 83 Linux
   /dev/sdb6 63330304 126244863 31457280 83 Linux
   /dev/sdb7 126246912 189155327 31454208 83 Linux

   When I mount /dev/sdb1 and run df -T is get:

   [root@marvin hal]# df -T | grep sdb
   /dev/sdb1 ext3 198337 98582 89515 53% /media/027e0753-3be0-4c33-ac60-bb9bbb4af80b

   and finally:

   [root@marvin hal]# ls /media/027e0753-3be0-4c33-ac60-bb9bbb4af80b/boot/
   grub vmlinuz-2.6.30.6-slitaz

   Does this help?

   Posted 11 years ago #
4. 

   Aleksej
   

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   Try to change /dev/hda1 to /dev/sda1 in your menu.lst:
   

   kernel /boot/vmlinuz-2.6.30.6-slitaz root=/dev/sda1 quiet

   or
   

   kernel /boot/vmlinuz-2.6.30.6-slitaz root=UUID=027e0753-3be0-4c33-ac60-bb9bbb4af80b quiet

   Posted 11 years ago #
5. 

   hallevison
   

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   Member

   Neither one of those worked. However, I found a copy rootfs.gz on the CD. I copied that to /boot/rootfs-2.6.30.6-slitaz.gz and changed my menu.lst to:

   # For booting SliTaz from : /dev/hda1
   #
   title SliTaz GNU/Linux (cooking) (Kernel vmlinuz-2.6.30-slitaz)
   root (hd0,0)
   kernel /boot/vmlinuz-2.6.30.6-slitaz root=UUID=027e0753-3be0-4c33-ac60-bb9bbb4af80b quiet
   initrd /boot/rootfs-2.6.30.6-slitaz.gz

   and that works! It is very slow though. I guess it need to uncompress rootfs-2.6.30.6-slitaz.gz. Can you think of any way around that?

   Posted 11 years ago #
6. 

   hallevison
   

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   Oops. I was wrong. It IS booting, but it is booting the OS from the CD image and does not see the new filesystem. So, I am back where I was.

   Posted 11 years ago #
7. 

   Aleksej
   

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   Are you installed SliTaz on your hard disk?
   Do you have next folders & file on your hard disk partition /dev/hda1 (or /dev/sda1)?—
   

   bin    etc    init   media  proc   sbin   tmp    var
   dev    home   lib    mnt    root   sys    usr

   Can you start SliTaz LiveCD? Open terminal, became root (by typing su with password root), and start gparted. What GPartEd tell you about your hard drive, is it /dev/hda or /dev/sda?

   Or, with fdisk -l
   I can see, it tells you about sda. So why you use hda?

   Posted 11 years ago #
8. 

   christophe
   

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   Took me about 6 months to find a way around a similar problem

   Add rootdelay=9 and make sure you address the right device (ie, i think from your config, sda1)
   eg grub.list:

   title SliTaz GNU/Linux (cooking) (Kernel vmlinuz-2.6.30-slitaz)
   root (hd0,0)
   kernel /boot/vmlinuz-2.6.30.6-slitaz root=/dev/sda1 rootdelay=9 quiet

   If it does not work then switch back to hda1 and try again
   if it works you may have to manually adjust /etc/fstab for /home

   Posted 11 years ago #
9. 

   hallevison
   

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   That worked, Christophe. Thanks. Indeed, thanks to both of you!

   Posted 11 years ago #
10. 

    christophe
    

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    happy to hear that, thanks for the feedback.
    We should really document somewhere that with external disks some rootdelay parameter is required....

    Posted 11 years ago #
11. 

    gdesilva
    

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    @christophe, this is already documented in

    http://doc.slitaz.org/en:handbook:installation

    under Installing SliTaz on an USB Device section.

    Posted 11 years ago #
12. 

    christophe
    

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    Good point. That makes me wonder if we could improve the documentation here.
    Or better probably just add the rootdelay by default in config.lst (it does not hurt if not needed...)

    I have not renewed my registration to update the doc since the site changed a while ago but will consider doing it ;)

    Posted 11 years ago #
13. 

    Aleksej
    

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    Coder-hobbyist

    Hi Christophe,

    better probably just add the rootdelay by default

    Please, compare:

    Boot in 10 seconds or less on a very recent machine
    [SliTaz 4.0 Release Notes]

    rootdelay=10
    [SliTaz Doc: Installing SliTaz on an USB Device]

    Ten seconds to booting + ten seconds to waiting usb drive.

    Posted 11 years ago #
14. 

    christophe
    

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    Did you actually compare it ?

    I have not tried it recently, but it seemed to me from what i remember the rootdelay get shortened once the device is mounted (ie, it DOES NOT add 10s delay, just the time required, if any)

    Posted 11 years ago #
15. 

    Aleksej
    

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    Oh, thank you, Christophe.

    Not, actually I not compared. Sorry. Only I remember real 6 s delay in the 3.0. Don't know if it was rootdelay or another sort of delay in waiting for usb device.

    If so like you say, then it does no harm.

    Posted 11 years ago #

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