In an act of pure magic I managed to recover most, if not all, of my old posts from an old SQL dump I found on an even older disk. All the time I expected there to be a full database backup on my old server which I meant to restore just as soon as I had access to the machine. As it turns out my backups were all located on the disk that died, the very same disk where the live database was located. Sometimes I scare myself..
Luckily though I had a slightly older dump available on the surviving hard drive and after creating a sandbox WordPress installation I was able to export my old blog and import it into this one so in the end it all turned out fine anyway.