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w00t
Asked: 2010-06-13 17:25:41 +0800 CST

grub crc error after decompressing linux

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I have a debian with a raid1 on it. Both HDDs have bootable flags and grub setup in MBR. If I only start up with sda, linux boots. If I only start up with sdb, grub shows up and says 

Decompressing Linux...
crc error
-- System halted

I have reinstalled grub a few times now but still nothing.
It goes like this:
/dev/md0 contains /dev/sda1 /dev/sdb1
find /boot/grub/stage1 shows (hd0,0) (hd0,1)
The line that boots Linux shows:
root (hd0,0)
kernel /vmlinuz-2.6.26-1-686
initrd /initrd.img-2.6.26-1-686

This kind of renders my "redundant" array useless.
Any clues?

update: just to mention, these are 2 different HDDs, sda is 320gb and sdb is 400gb. Both are WD and both have exactly the same partitions, cloned using sfdisk.

grub

3 Answers

  1. If you built the raid correctly and it fully synced then chances are high that you have some bad sectors on sdb.

    What does the output of 

    cat /proc/mdstat

    say about the device ?

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  2. Best Answer

    I finally managed to repair it. It was a HDD related problem and I had to go into BIOS, at the HDD's options and disable Block Mode.
    Then I just proceeded with the normal installation: re-add the partitions to the array, setup grub.
    It now works booting from this drive.

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  3. root (hd0,0) 
kernel /vmlinuz-2.6.26-1-686 
initrd /initrd.img-2.6.26-1-686

    If this is from your grub.conf on sdb, it's missing some important information, such as what to boot. The kernel line should look something more like this:

    kernel /vmlinuz-2.6.26-1-686 ro root=/dev/sda5

    with root= pointing to the block device that contains the / filesystem.

    In addition, if you're booting off the secondary drive, you'll want to specify that grub actually use it -- specifically,

    root (hd1,0)
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