Restore a database from a partition dump

I had a hardware crash, but was able to recover the partition with dd. It is currently mounted to /media/tmp/ in the new set system (running xubuntu 18.04 with influxdb from repository). I also made a new instance of my sensor database. How can I import the old data that is somewhere on /media/tmp/ to the new database?
Where is the old data stored, the folder /media/tmp/var/lib/influxdb/ does not contaion any big files that look like my old database? The database was called mysensors_db.
I do not have a recent backup made by influxd backup -database mysensors_db