What is Slack Space?

The unused space in a disk cluster. The DOS and Windows file systems use fixed-size clusters. Even if the actual data being stored requires less storage than the cluster size, an entire cluster is reserved for the file. The unused space is called the slack space. DOS and older Windows systems use a 16-bit file

Hiding Data and Wipe Data on Slack Space using Bmap

In the following example we will hide some text into slack space. Let’s see what options we have on bmap: bmap –help bmap:1.0.17 (12/25/10) newt@scyld.com Usage: bmap [OPTION]… [] use block-list knowledge to perform special operations on files –doc VALUE where VALUE is one of: version display version and exit help display options and exit