## migrating a host to a new drive ### 1. copy persistent data off of the host: ```sh $ mkdir -p mnt old/persist $ mount /dev/$old mnt $ rsync -arv mnt/persist/ old/persist/ ``` ### 2. flash the new drive ``` $ nix-build -A hosts.moby.img $ dd if=$(readlink ./result) of=/dev/$new bs=4M oflag=direct conv=sync status=progress ``` ### 3.1. expand the partition ```sh $ cfdisk /dev/$new # scroll to the last partition > Resize leave at default (max) > Write type "yes" > Quit ``` ### 3.2. expand the filesystem ``` $ mkdir -p /mnt/$new $ mount /dev/$new /mnt/$new $ btrfs filesystem resize max /mnt/$new ``` ### 4. copy data onto the new host ``` $ mkdir /mnt/$new $ mount /dev/$new /mnt/$new # if you want to use btrfs snapshots (e.g. snapper), then create the data directory as a subvolume: $ btrfs subvolume create /mnt/$new/persist # restore the data $ rsync -arv old/persist/ /mnt/$new/persist/ ``` ### 5. ensure/fix ownership ``` $ chmod -R a+rX /mnt/$new/nix # or, let the nix daemon do it: $ nix copy --no-check-sigs --to /mnt/$new $(nix-build -A hosts.moby) ``` ### 6. insert the disk into the system, and boot!