Setting up backup disk

Prepare partition

1. Attach disk to laptop
2. Start gparted (sudo gparted), delete existing partitions and create a single new one; partition table should be gpt
3. Encrypt the partition with LUKS: sudo cryptsetup luksFormat -c aes-xts-plain64 -s 512 -h sha512 -y /dev/DEVICENAME
4. Open the encrypted partition: sudo cryptsetup luksOpen /dev/DEVICENAME backup10tb
5. Format the encrypted partition with btrfs: sudo mkfs.btrfs -L "backup10tb" /dev/mapper/backup10tb
6. Mount the partition: sudo mkdir /mnt/backup10tb && sudo mount /dev/mapper/backup10tb /mnt/backup10tb

Create initial subvolumes on external disk

1. cd /mnt/backup10tb
2. sudo btrfs subvolume create ./annex
3. sudo btrfs subvolume create ./backup

Send backups to external disk

1. Create new snapshots for all partitions: for i in @ @etckeeper @home @repos @root; do btrfs subvolume snapshot -r /mnt/master/$i /mnt/master/backups/for-external/$i/$(date "+%Y-%m-%d")--01 ; done
2. Create the target diretory: for i in @ @etckeeper @home @repos @root; do mkdir /mnt/backup10tb/backup/$i/; done
3. Send snapshots to backup disk: for i in @ @etckeeper @home @repos @root ; do btrfs send /mnt/master/backups/for-external/$i/2019-11-24--01 | btrfs receive /mnt/backup10tb/backup/$i/ ; done

Clone annex repos

1. cd /mnt/backup10tb/annex
2. git clone /home/mfk/repos/annex/newspaper/ -o remote-name
3. cd newspaper
4. git config user.name "Name"
5. git config user.email info@example.org
6. git annex init "Repo Name"
7. git annex get --from remote-name --all
8. git annex sync

Send incremental backups

btrfs subvolumes

1. Create new snapshots for all partitions: for i in @ @etckeeper @home @repos @root; do btrfs subvolume snapshot -r /mnt/master/$i /mnt/master/backups/for-external/$i/$(date "+%Y-%m-%d")--02 ; done
2. Send incremental snapshots to backup disk: for i in @ @etckeeper @home @repos @root ; do btrfs send -p /mnt/master/backups/for-external/$i/2019-11-24--01 /mnt/master/backups/for-external/$i/2019-11-24--02 | btrfs receive /mnt/backup10tb/backup/$i/ ; done

Annex repos

1. cd /mnt/backup10tb/annex/newspaper/
2. git annex sync
3. git annex get --from remote-name --all
4. git annex sync