<p>Finally I have restored my database, as I bought a SATA cable. Sorry for the radio silence, I hope your readers won’t overflow!</p>

<p><b>#postmortem TL;DR</b>: tried to disassemble my server, fried the BIOS, too lazy to bring it to service center and all my data was locked up on a HDD to which I couldn’t connect. But I bought a SATA cable and heroically retrieved the database.</p>

<p>Even shorter TL;DR: you need a backup off-site. I’ll probably set up a cron job that will send the DB dump to a remote server.</p>