GRUB Problem: stage2Read Error
From: Grant Forrester (grant_at_forresterfamily.f2s.com)
Date: 01/30/04
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Date: 29 Jan 2004 16:58:09 -0800
I am trying to install Grub on a Sandisk 16Mb CompactFlash card using
an IDE adapter.
When I try and boot from the CF Card I get the following error.
Verifying DMI Pool Data........
GRUB Loading stage2Read Error
I would be really grateful if someone could explain what this error
message means or help shed some light on how to resolve the problem.
How do I get more info?
The history of how I set up the card is outlined below. Apologies for
the length of the email.
I really would be grateful for any help or pointers.
Thanks in advance
Grant Forrester
System: Via ITX ME6000 mainboard
OS: Redhat 7.3
Primary Master: Excelstor 20Gb HDD
Secondary Master: Sandisk SDCFB-16 + IDE Adpator
BIOS
----
Inspection of the BIOS reveals the CF card has been correctly
identified as the master device on the seconday ide channel. The
properties for the card are given as:
size: 16Mb
Cylinders: 490
Heads: 2
Sectors: 32
I have checked and confirmed these to be correct in accordance with
Sandisks own documentation.
FDISK (v2.11n)
-----
On booting the full Redhat installation on my main HDD (/dev/hda) I
can inspect and set the partition table on the CF card (/dev/hdc)
using fdisk as follows:
$ fdisk /dev/hdc
Disk /dev/hdc: 2 heads, 32 sectors, 490 cylinders
Units = cylinders of 64 * 512 bytes
Device Boot Start End Blocks Id System
/dev/hdc1 * 1 490 15664 83 Linux
MKE2FS (v1.27)
------
The single partition on the CF card (/dev/hdc1) is then formatted as
an ext2fs filesystem as follows:
$ mke2fs /dev/hdc1
mke2fs 1.27 (8-Mar-2002)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
3920 inodes, 15664 blocks
783 blocks (5.00%) reserved for the super user
First data block=1
2 block groups
8192 blocks per group, 8192 fragments per group
1960 inodes per group
Superblock backups stored on blocks:
8193
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 28 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
The filesystem can then be mounted on /mnt/flash and inspected as
follows:
$ mount /dev/hdc1 /mnt/flash
$ ls /mnt/flash
lost+found
Copy GRUB and boot files
------------------------
All the files found in my Redhat /boot/grub directory are then copied
to the flash folder /grub as follows:
$ cp -R /boot/grub /mnt/flash
$ ls -l /mnt/flash/grub
-rw-r--r-- 1 root root 101 Jan 27 20:49 device.map
-rw-r--r-- 1 root root 10880 Jan 27 20:49 e2fs_stage1_5
-rw-r--r-- 1 root root 9808 Jan 27 20:49 fat_stage1_5
-rw-r--r-- 1 root root 8896 Jan 27 20:49 ffs_stage1_5
-rw------- 1 root root 667 Jan 27 20:49 grub.conf
-rw-r--r-- 1 root root 11104 Jan 27 20:49 jfs_stage1_5
lrwxrwxrwx 1 root root 11 Jan 27 20:49 menu.lst ->
./grub.conf
-rw-r--r-- 1 root root 9280 Jan 27 20:49 minix_stage1_5
-rw-r--r-- 1 root root 12576 Jan 27 20:49
reiserfs_stage1_5
-rw-r--r-- 1 root root 33585 Jan 27 20:49 splash.xpm.gz
-rw-r--r-- 1 root root 512 Jan 27 20:49 stage1
-rw-r--r-- 1 root root 131008 Jan 27 20:49 stage2
-rw-r--r-- 1 root root 8544 Jan 27 20:49
vstafs_stage1_5
-rw-r--r-- 1 root root 12744 Jan 27 20:49 xfs_stage1_5
The kernel and initrd images I require are then copied to /mnt/flash.
(I have successfully booted from these images using a temporary grub
boot option in my existing Redhat install /dev/hda so I know they
work).
$ ls -l /mnt/flash
drwxr-xr-x 2 root root 1024 Jan 27 20:49 grub
-rw-r--r-- 1 root root 8388608 Jan 27 20:53 ice3.img
drwx------ 2 root root 12288 Jan 27 20:44 lost+found
-rw-r--r-- 1 root root 1041347 Jan 27 20:53
vmlinuz-2.4.18-3
Do GRUB magic (0.91)
-------------
Start the grub console and wait for the BIOS probing to end.
Available devices detected are (hd0) HDD and (hd1) Sandisk CF card.
The GRUB session is as follows.
grub> geometry (hd1)
drive 0x81: C/H/S = 490/2/32, The number of sectors = 31360,
/dev/hdc
Partition num: 0, Filesystem type is ext2fs, partition type 0x83
grub> root (hd1,0)
Filesystem type is ext2fs, partition type 0x83
grub> setup (hd1,0)
Checking if "/boot/grub/stage1" exists... no
Checking if "/grub/stage1" exists... yes
Checking if "/grub/stage2" exists... yes
Checking if "/grub/e2fs_stage1_5" exists... yes
Running "embed /grub/e2fs_stage1_5 (hd1,0)"... failed (this is not
fatal)
Running "embed /grub/e2fs_stage1_5 (hd1,0)"... failed (this is not
fatal)
Running "install /grub/stage1 d (hd1,0) /grub/stage2 p
/grub/grub.conf "... succeeded
Done.
Reboot
------
On reboot I switched the boot order to start with HDD1 (ie the CF
card) rather than my disk. I get the error 'GRUB Loading stage2Read
Error'.
I even tried removing my existing HDD and plugging the CF card into
the primary IDE channel making it HDD0. Resetting the BIOS to boot
from HDD0 results in the same error message.
Any help please?
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