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Full Discussion: shift hard disk from primary IDE channel to secondary IDE channal
Special Forums Hardware Filesystems, Disks and Memory shift hard disk from primary IDE channel to secondary IDE channal Post 302241541 by otheus on Monday 29th of September 2008 03:20:45 PM
Old 09-29-2008
I cannot give a Debian-specific answer. The main problem is that modern Linux distributions do something like the following in /etc/fstab:
Code:
LABEL=BOOT            /boot  ext2  auto,defaults defaults 0 0 
LABEL=ROOT            /        ext2  auto,defaults defaults 0 0

The "Label" stuff is what's giving you the problem. What happens is that every partition gets a filesystem-specific "tag" such as "BOOT" or "ROOT". The mount process finds the "first" partition that matches this tag.

To fix this, hard-code the device IDs. So in the /etc directory on the / mountpoint on your SECOND drive, do something like this:
Code:
/dev/hdb1          /boot       <other stuff>
/dev/hdb2          /             <other stuff>

But you're not done yet. If your boot-loader is "grub", you also have to go into the SECONDARY Boot partition and change the grub configuration there to make sure if tries to load the kernel and "initrd" image off /dev/hdb* instead of "BOOT" or "ROOT", etc.

You're still not done. In the grub configuration on the PRIMARY drive, in the Boot partition, you have to install a "chain loader" into the Grub configuration. Google for "Grub" and "chain loader".
 

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LEARN ABOUT MOJAVE

bootctl

BOOTCTL(1)                                                            bootctl                                                           BOOTCTL(1)

NAME

       bootctl - Control the firmware and boot manager settings

SYNOPSIS

       bootctl [OPTIONS...] status

       bootctl [OPTIONS...] list

       bootctl [OPTIONS...] update

       bootctl [OPTIONS...] install

       bootctl [OPTIONS...] remove

DESCRIPTION

       bootctl checks, updates, installs or removes the boot loader from the current system.

       bootctl status checks and prints the currently installed versions of the boot loader binaries and all current EFI boot variables.

       bootctl list displays all configured boot loader entries.

       bootctl update updates all installed versions of systemd-boot, if the current version is newer than the version installed in the EFI system
       partition. This also includes the EFI default/fallback loader at /EFI/BOOT/BOOT*.EFI. A systemd-boot entry in the EFI boot variables is
       created if there is no current entry. The created entry will be added to the end of the boot order list.

       bootctl install installs systemd-boot into the EFI system partition. A copy of systemd-boot will be stored as the EFI default/fallback
       loader at /EFI/BOOT/BOOT*.EFI. A systemd-boot entry in the EFI boot variables is created and added to the top of the boot order list.

       bootctl remove removes all installed versions of systemd-boot from the EFI system partition, and removes systemd-boot from the EFI boot
       variables.

       If no command is passed, status is implied.

OPTIONS

       The following options are understood:

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

       --path=
           Path to the EFI System Partition (ESP). If not specified, /efi, /boot, and /boot/efi are checked in turn. It is recommended to mount
           the ESP to /boot, if possible.

       -p, --print-path
           This option modifies the behaviour of status. Just print the path to the EFI System Partition (ESP) to standard output and exit.

       --no-variables
           Do not touch the EFI boot variables.

EXIT STATUS

       On success, 0 is returned, a non-zero failure code otherwise.

SEE ALSO

       Boot loader specification[1] systemd boot loader interface[2]

NOTES

        1. Boot loader specification
           https://www.freedesktop.org/wiki/Specifications/BootLoaderSpec

        2. systemd boot loader interface
           https://www.freedesktop.org/wiki/Software/systemd/BootLoaderInterface

systemd 237                                                                                                                             BOOTCTL(1)
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