Re: Moving system from current old MBR HDD to new GPT HDD

[Andrey Borzenkov]

В Sun, 19 May 2013 11:26:42 +0200
Warpme <address@hidden> пишет:

> Hi *
> I'm trying to understand where I do mistake...
> I want to migrate my ArchLinux (3.3.8 kernel) running on MBR partitioned 
> HDD to new GPT HDD.
> I'm using grub 2.00
> 
> What I do:
> 1.using gdisk I create GTP partitions on my new HDD like following:
> 
> gdisk /dev/sdb
> 
> GPT fdisk (gdisk) version 0.8.4
> 
> Partition table scan:
>    MBR: protective
>    BSD: not present
>    APM: not present
>    GPT: present
> 
> Found valid GPT with protective MBR; using GPT.
> 
> Command (? for help): p
> Disk /dev/sdb: 20971520 sectors, 10.0 GiB
> Logical sector size: 512 bytes
> Disk identifier (GUID): B76025A4-B90F-4781-8754-0B0EBF699230
> Partition table holds up to 128 entries
> First usable sector is 34, last usable sector is 20971486
> Partitions will be aligned on 8-sector boundaries
> Total free space is 6 sectors (3.0 KiB)
> 
> Number  Start (sector)    End (sector)  Size       Code  Name
>     1              40          409639   200.0 MiB   EF02  BIOS boot 
> partition
>     2          409640         9625639   4.4 GiB     8300  Linux filesystem
>     3         9625640        18841639   4.4 GiB     8300  Linux filesystem
>     4        18841640        20971486   1.0 GiB     8300  Linux filesystem
> 
> 2. Make ext3 volume on 2nd partition on new HDD
> 
> 3. Mount 2nd part and rsync current OS to this new volume
> 

On which mount point?

> 4. Install grub on new HDD
> grub-install /dev/sdb
> 
> 5. Adjust /etc/default/grub for suitable kernel boot parameters, etc.
>   -changed "GRUB_CMDLINE_LINUX="vga=0x305 console=tty1 init=/bin/systemd"
>   -uncomment "GRUB_DISABLE_LINUX_UUID=true"
> 
> 6. Make grub.cfg
> grub-mkconfig -o /boot/grub/grub.cfg
> 
> 7. Inspect new grub.cfg for any UUID references. There is no any 
> reference to UUID.
> 
> New, when I'm trying to boot OS from new HDD I'm receiving following error:
> 
> Welcome to GRUB!
> error: no such device <UUID of old HDD boot partition>
> Entering rescue mode
> 
> I make sure new grub.cfg hasn't any entries with old boot part UUID 
> (ff6d81f8-e6ab-4d80-92b5-df70748629e1).
> Only place on new HDD where I see it is /boot/grub/i386-pc/load.cfg
> 
> search.fs_uuid ff6d81f8-e6ab-4d80-92b5-df70748629e1 root hd0,msdos1
> set prefix=($root)/boot/grub
> 
> Where is error in above procedure ?
> 

GRUB needs to know where /boot/grub is located. So it either takes it
from mount point or you need to explicitly tell where it is using

grub-install --boot-directory=/boot_alt ...

In your case you need to mount /boot filesystem from the second HDD
somewhere and tell grub it should look there.

> BTW: I also tried to use grub install cmd line form Arch wiki
> grub-install --target=i386-pc --recheck --debug /dev/sdb
> 
> Issue is the same :-(