Hello.
NO both the "clean all" and the "clean" commands will destroy data on the Hard Disk Drive; "clean all" will over-write all the data with zeroes and "clean" will remove all the format date from the HDD
do not use either on a HDD that has data you need to save.
A better option would be to use Option Three in this tutorial at the link below to do a partition specific wipe (secure erase) to a specific partition, this will not affect other data on the HDD at all.
Partition Wizard : Use the Bootable CD