luthis

luthis, 1 year ago (edited 1 year ago)

The script takes the drives as arguments:

<span style="color:#323232;">$ pwd
</span><span style="color:#323232;">/usr/lib/systemd/system
</span><span style="color:#323232;">$ cat drive_backup.service 
</span><span style="color:#323232;">[Unit]
</span><span style="color:#323232;">Description=backup fdisk + e2image
</span><span style="color:#323232;">Wants=drive_backup.timer
</span><span style="color:#323232;">
</span><span style="color:#323232;">[Service]
</span><span style="color:#323232;">Type=oneshot
</span><span style="color:#323232;">ExecStart=/usr/bin/backup_meta_data.sh /dev/sdc1 /dev/sdb1
</span><span style="color:#323232;">
</span><span style="color:#323232;">[Install]
</span><span style="color:#323232;">WantedBy=multi-user.target
</span>

Set to run at 3:40am every day, but probably could be once weekly really.

<span style="color:#323232;">$ cat drive_backup.timer 
</span><span style="color:#323232;">[Unit]
</span><span style="color:#323232;">Description=timer to run drive backup
</span><span style="color:#323232;">Requires=drive_backup.service
</span><span style="color:#323232;">
</span><span style="color:#323232;">[Timer]
</span><span style="color:#323232;">Unit=drive_backup.service
</span><span style="color:#323232;">OnCalendar=*-*-* 03:40:00
</span><span style="color:#323232;">
</span><span style="color:#323232;">[Install]
</span><span style="color:#323232;">WantedBy=timers.target
</span>

Should be fairly self-explanatory.

<span style="color:#323232;">$ cat /usr/bin/backup_meta_data.sh
</span><span style="color:#323232;">#!/bin/bash
</span><span style="color:#323232;">
</span><span style="color:#323232;">working_dir=/home/st/drive_recovery/working
</span><span style="color:#323232;">backup_dir=/home/st/drive_recovery
</span><span style="color:#323232;">backup_date=$(date +%Y%m%d-%H%M)
</span><span style="color:#323232;">
</span><span style="color:#323232;">mkdir -p $working_dir
</span><span style="color:#323232;">
</span><span style="color:#323232;">sudo fdisk -x > $working_dir/$backup_date.fdisk
</span><span style="color:#323232;">
</span><span style="color:#323232;">for var in "$@"
</span><span style="color:#323232;">do
</span><span style="color:#323232;">	clean=$(echo $var | sed 's;/;-;g')
</span><span style="color:#323232;">	sudo e2image $var $working_dir/$backup_date.$clean
</span><span style="color:#323232;">done
</span><span style="color:#323232;">
</span><span style="color:#323232;">sudo 7z a $backup_dir/$backup_date.archive $working_dir/"$backup_date"*
</span><span style="color:#323232;">sudo rm $working_dir/"$backup_date"*
</span>

luthis, 1 year ago

Great tips, thanks!

I’m using ext4 across everything I think.

Can you enable superblocks after you’ve already formatted the drive?

Fdisk saves the offsets so keeping a record of that at least sounds like a good idea.

luthis, 1 year ago

Yeah definitely share your config! I’ve only just scratched the surface with wxHexEditor