MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

Objective 2.1 Monitor, Manage, and Troubleshoot Access to Files and Folders
Objective 2.1
Monitor, Manage, and
Troubleshoot Access to Files
and Folders
22-5
Windows XP Professional administrators must understand the details behind NTFS
compression precisely because it is so easy to use. As the feature increases in popularity,
so will the number of users experiencing problems. Although any user can compress
a folder using Windows Explorer, only the system administrators can explain
exactly how compressed folders affect system performance and available disk space.
Although Windows Explorer provides the most user-friendly interface into the details
of compression, the Compact.exe utility is useful to administrators who need to compress
multiple folders on a system or compress folders on many different systems.
NTFS file compression does not obey the same rules of inheritance as other aspects of
Windows XP. For example, files that are copied always inherit the compression state of
the destination folder. However, if you move files within a single volume, the compression
state of the file is retained. To make things more confusing, files moved between
different volumes inherit the compression state of the destination folder.
Windows XP Professional includes the ability to restrict users’ access to files and folders
using NTFS file permissions. For example, a user that has Full Control permission to a
file might alter other users’ rights to that file by modifying the discretionary access control
list (DACL). Similar to the way Compact.exe provides a command-line alternative
to enable compressing within Windows Explorer, Cacls.exe provides a command-line
method for modifying file permissions.