Odd Kernel Panic, Repeatable

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I had an old server die; we had another, same model, sitting around lightly used, so I did what I’ve done before: swap the RAID card into that, swap the drives, even putting them in the same bays as the dead one, and boot.

Nope. 100% of the time, when it hits switching roots, it kernel panics.

Adding rdshell to the kernel line does nothing, I get no grub rdshell. Booting from a flash drive into rescue, it finds everything, *perfectly*, and mounts it all, including the RAID data drives.

I’ve rebuilt the initrd, and no joy.

Anyone have an idea?

mark

2 thoughts on - Odd Kernel Panic, Repeatable

  • Did you try running “grub-install” after your rescue-mode boot and chroot into /mnt/sysimage? If that doesn’t fix it there is probably something different about the device/naming of the root partition.

  • Put another drive in, and had all kinds of grief before, right before I left yesterday, it FINALLY came up. After disconnecting the RAID (I may have wiped one of the RAID devices – luckily this is a backup system). I’m guessing the damn thing, every time I changed drives, reenumerated, ignoring my previous settings, and deciding on its own what should should be the first drive. Wonder if the battery needs replacing….

    Of course I tried grub-install. At least two tries, after pxebooting to linux rescue (and it would mount everything *perfectly*), I’d see root was
    /dev/sda… but grub-install announced that sda had no BIOS entry….

    mark