bugGNU GRUB - Bugs: bug #14758, CD boot only gives Error 25: Disk...

 
 

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bug #14758: CD boot only gives Error 25: Disk read error

Submitter:  Bob Fearnley <electron1948>
Submitted:  Mon 10 Oct 2005 11:54:27 AM UTC
Votes: 100
 
Category:  Booting Severity:  Major
Priority:  5 - Normal Item Group:  Software Error
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  Bob Fearnley
Open/Closed:  Closed Release:  None
Release:  V0.95 Reproducibility:  Every Time
Planned Release:  None

Jump to the original submission

Sat 15 Dec 2007 09:02:59 PM UTC, comment #7: 

We've moved to GRUB 2 as a development platform. Please can you check if this bug still applies there, and if it does, reopen it?

Btw, you can use the "grub-mkrescue" command to generate ISO images for testing.

Thanks

 Robert Millan <robertmh>
Group administrator
Tue 09 May 2006 04:43:32 AM UTC, comment #6: 

Eltorito-based Grub CD tests on Gentoo showed all current Grub versions, from 0.96-r1 through 0.97-r2, give error 25 when selecting from the distros displayed on the Gentoo splash screen.

Similar tests on Slax 5.1.4 gave error 25 with Grub version 0.97, a module converted from Slackware grub-0.97-i486-2.tgz.

However, Kanotix 'Easter Edition', which uses grub-0.97.7.1 (Debian) produced Grub CDs which worked perfectly.

To see if the Gentoo errors were RAM involved I recompiled without himem, effectively limiting RAM to 800+ MB. Re-emerged grub, but nothing helped.

Finally I copied both stage2_eltorito files which worked to Gentoo, and made Grub CDs which worked perfectly.

The 'good' files were:
Slax grub module version 0.95
Kanotix  grub version 0.97.7.1

NB! In case its relevant - at the same time as adding RAM, I swapped my 160GB 2nd hard drive with a 320GB replacement.

G Fraser <cintra>
Mon 08 May 2006 07:49:40 AM UTC, comment #5: 

This is supposedly fixed on:
http://savannah.gnu.org/bugs/?func=detailitem&item_id=14407

Check the patch:
http://savannah.gnu.org/bugs/download.php?file_id=2508

I have also a better patch for this (I believe) in my own patched grub (you can dig into source code of Super Grub Disk (dev_grub folder)

http://adrian15.raulete.net/grub/

for it. I will try to make a patch for 0.97 version and send it here... But as far as I can forget it... do not hesitate to send me a reminder email adrian15 @ raulete . net


adrian15

 adrian15 <adrian15>
Sun 07 May 2006 03:05:47 PM UTC, comment #4: 

Sorry, take back that last comment. I just burnt a new Grub CD on the latest version of Slax, 5.1.4 and was amazed when it booted OK. Slax is using version 0.95, and I see now that Gentoo doesn't have that version in portage!

I'll get back with more info asap.

 G Fraser <cintra>
Sun 07 May 2006 01:13:55 PM UTC, comment #3: 

I have been chasing this problem for a day on my Grub CD, after upgrading from 768MB to 1.5GB RAM.

I have tried versions 0.95 up to 0.97-r2 built on Gentoo, and am convinced it is related to the RAM increase.. my Grub floppy fallback with the same menu.lst works with no problem.

For the time being I have no plans on pulling the box apart to prove the point..

G Fraser <cintra>
Wed 03 May 2006 06:24:20 AM UTC, comment #2: 

Having the exact same problem with Debian unstable's latest (as of today) grub (GNU GRUB 0.97).

I am not trying to boot from CD, but from disk, my setup is very regular.   Manually entering the EXACT SAME command simply works.

Please try to resolve this ASAP, it's quite critical.

# egrep -v '^#' /boot/grub/menu.lst
default         0
timeout         5
color cyan/blue white/blue

title           Debian GNU/Linux, kernel 2.6.16.12
root            (hd0,0)
kernel          /boot/vmlinuz-2.6.16.12 root=/dev/sda1 ro
savedefault
boot

Marc <marcsparc>
Tue 17 Jan 2006 12:14:23 AM UTC, comment #1: 

I am encountering the exact same problem with the newer version of Grub 0.97

 Rahul Bhargava <b_rahul>
Mon 10 Oct 2005 11:54:27 AM UTC, original submission:  

Hi,  New to Linux so please bare with me.  Have read the Grub manual and experimented for hours (in fact, days) but cannot get past the following when trying to boot from a CD created exactly as per the manual,  using Grub 0.95:

  Booting command-list
  error 25: disk read error
  Press any key to continue

Pressing a key takes me to the menu where I can see the entries I expect.  Have checked the entries using the edit functions and they are correct.  The menu has the splash image from the HD.

If I drop into a command line and type exactly the same commands the system will boot perfectly - into both FC4 and XP.

In grub I can also read the HD with:  'cat (hd0,14)/boot/grub/grub.conf'  and I get the correct result.

So it seems that there is no problem  reading the HD.

Grub is installed into the linux partition and I'm booting using NTLOADER and grub.bin - this works perfectly using the same grub.conf file.  This is only a temporary stage so I need the boot CD to work so I can move on.

This looks like a Grub bug to me although I could well be missing the obvious, all the info I can think of and requested in the manual is below.  Thanks for any help.

CD contains:

  /boot.catalog
  /boot/grub/stage2_eltorito
  /boot/grub/grub.conf
  /boot/grub/menu.lst
  /boot/grub/device.map

grub.conf & menu.lst both contain:

  default=0
  timeout=5
  splashimage=(hd0,14)/boot/grub/splash.xpm.gz
  hiddenmenu
  title Fedora Core (2.6.11-1.1369_FC4)
root (hd0,14)
kernel /boot/vmlinuz... ro root=LABEL=LINUX rhgb
initrd /boot/initrd-2.6.11-1.1369_FC4.img
  title Windows
rootnoverify (hd0,0)
chainloader +1

(The above "root=LABEL=LINUX" was created during FC4 installation. 'LINUX' was the name I entered during partition creation with Partition Magic.)

Device.map:

  (fd0) /dev/fd0
  (hd0) /dev/sda
  (hd1) /dev/sdb

fdisk -l gives:

[root@localhost ~]# fdisk -l

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        1026     8241313+   c  W95 FAT32 (LBA)
/dev/sda2            1027       14593   108976927+   f  W95 Ext'd (LBA)
/dev/sda5            1027        1039      104391    6  FAT16
/dev/sda6            1171        1798     5044378+   b  W95 FAT32
/dev/sda7            1799        2308     4096543+   b  W95 FAT32
/dev/sda8            2309        2818     4096543+   b  W95 FAT32
/dev/sda9            2819        6102    26378698+   b  W95 FAT32
/dev/sda10           6103        6362     2088418+   b  W95 FAT32
/dev/sda11           6363        6486      995998+   6  FAT16
/dev/sda12           6487        6996     4096543+   b  W95 FAT32
/dev/sda13           6997        7124     1028128+   b  W95 FAT32
/dev/sda14           7125        7188      514048+  82  Linux swap / Solaris
/dev/sda15           7189        8463    10241406   83  Linux

(same for sdb as this is RAID)


Bob Fearnley <electron1948>

 

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  • -email is unavailable- added by robertmh (Posted a comment)

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    There are 100 votes so far. Votes easily highlight which items people would like to see resolved in priority, independently of the priority of the item set by tracker managers.

     

    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2007-12-15 robertmh Open/ClosedOpen Closed
    2006-05-03 marcsparc Carbon-Copy- Added marcsparc

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