Free space wipe behavior in PT v.1.5.2.337
Internal SATA hard disk...NTFS...free space=115 GB.
It took 1 hour, seven minutes to fill the free space with data The rate was about 30 MB/sec (32.5 at the beginning, 29.5 at the end). Total written in this phase was 115 GB.
It continued to write using the default settings for another 12+ hours. Since this time was not in line with jv's post, and the progress bar did not move for 8 hours, I aborted the tool. Forgot to write down the "data written" -- sorry. :
This was the progress bar behavior:
at 50% after filling the free space with data -- 1.1 hour
at 65% after 4.5 hours
at 70% after 6 hours (rate down to 11.1 MB/sec)
at 70% after 13.75 hours (rate down to 5 MB/sec)
... clicked "Abort"