Result below: PIDĭownloaded and setup steam windows client with wine. I tried to test if the disk would show similar bad performance with other tasks, so I used caja to simply copy a folder containing about 13 GB of data in a couple of files. Running an ext4 filesystem that has about 1.3 TB of free space, 4.4 GB of used and is solely used for Steam games. My disk is local, mounted with barrier=0. I have seen quite a few of these googling the internet, but no real fix.
home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/tier1/./tier1/fileio.cpp (2965) : Assertion Failed: Failed to determine free disk space for, error 2