How do I replace the root drive on Debian? What is a comprehensive set of steps starting from old drive with a new empty drive ready to go to the new drive with a fully bootable install with grub and everything?
The following makes some assumptions:
- All commands ran as root when possible
- You want an ext4 files system
- You are loosely familiar on a basic level with all commands run
- You are NOT booting from a RAID device
So here we go.
- Physically install new disk into computer and connect to available port leaving old disk in existing position.
- Boot computer into old OS.
- Prepare and mount new disk; first identify new disk
- Partition new disk
Make partition primary partition with type "83" file system type.
- Create filesystem
- Mount new filesystem
mount /dev/(newpartition) /mnt/(newpartitionmountpoint)
- Copy disk:
/sbin/init 1 (drop to single user mode)
rsync -avxHAX / /mnt/(newpartitionmountpoint)
- Update FSTAB on newdisk
blkid (note UUID of new partition)
(editor of choice) /mnt/(newpartitionmountpoint)/etc/fstab
Replace existing UUID of / in FSTAB to new disk UUID
- Configure grub and install to new disk boot loader:
- Copy grub.cfg from old disk to new
cp -ax /boot/grub/grub.cfg /mnt/(newpartitionmountpoint)/boot/grub/grub.cfg
- Open grub.cfg on new disk and replace all UUIDs with new disk
(editor of choice) /mnt/(newpartitionmountpoint)/boot/grub/grub.cfg
Replace all old UUIDs with the UUID of the new disk
- Shut down computer
Physically move the new drive to the 1st drive location and remove old drive
14.Start computer and grub should present:
error: no such device: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
- Manually boot new OS from grub; first identify the drive and partition of the boot files
ls [to identify your drive and partition options]
ls (hdx,p)/ [to identify which partition has the /boot folder]
- Then, you can load the boot menu manually from the drive and partition you found above. Typically this would be (hd0,msdos1).
- Login to OS on new drive
- Configure grub again
fdisk -l (note dev of newdisk)
And that should be it!