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Slack Space

Slack space is a form of internal fragmentation, i.e. wasted space, on a hard disk. When a file is written to disk it’s stored at the “beginning” of the cluster. A cluster is defined as a collection of logically contiguous sectors and the smallest amount of disk space that can be allocated to hold a file. Rarely will there be an even match between the space available in a cluster (or collection of clusters for longer files) and the number of bytes in the file. Left over bytes in the cluster are unused, hence the name slack space.



For example, a 10 000 personal computer that stores files in a file system that uses a cluster size of 4 kilobytes will have approximately 10 000 x 2 MB ~ = 20000 KB. On a large file server, slack space and even reached the size of tens of gigabytes.


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1 comment:

  1. Chandra BoseJuly 26, 2012 at 1:40 AM

    I have an interview and these post helped me great a perfect idea in Slack space Security Job Duties Security Job Duties

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Slack Space

Slack space is a form of internal fragmentation, i.e. wasted space, on a hard disk. When a file is written to disk it’s stored at the “begin...