Jasse Jansson wrote: Doesn't this use of the dd command create a sparse file ??? This is something I wanted to ask for quite some time: does hammer support sparse files? if I create an empty file, seek to 1M, and write one byte of data, will it waste 1M worth of real disk space or not? How about if I write a 1M of 0 over an existing file, will I recover the space? Cedric