1. 1 Using Compressed Files and Folders Applications and operating systems read and write to compressed files. NTFS uncompresses the file before making it available. NTFS compresses the file when you exit or explicitly save the file. NTFS allocates disk space based on the uncompressed file size.

2. 2 Compressing Files and Folders Set the compression state of files and folders. Can change the color used to display compressed files and folders. Cannot use both NTFS encryption and compression on files or folders. Must have write permission to change the compression state. Can compress a folder, the files in it, or both. Compress a folder and the Confirm Attribute Changes dialog box displays. Cannot use compression if the cluster sizes are larger than 4 KB.

3. 3 Selecting an Alternate Color In Windows Explorer, on the Tools menu, click Folder Options. On the View tab, select Display Compressed Files And Folders With Alternate Color.

4. 4 Copying and Moving Compressed Files and Folders

5. 5 Using NTFS Compression Select the types of files to compress. Do not store compressed files, such as PKZIP files, in a compressed folder. Use a different display color for compressed files. Compress static data rather than data that changes frequently. Don’t compress files that you copy or move frequently.

6. Understanding Microsoft Windows 2000 Disk Quota Management Tracks and controls disk usage on a per-user, per-volume basis Bases disk usage on file and folder ownership Ignores compression Calculates free space for applications based on the user’s quota limit 6

7. 7 System Administrators Use Disk Quotas To specify the amount of disk space for each user To set a warning when the user is nearing this limit To deny users access if they exceed their limit To log an event when a user exceeds a specified disk space threshold

8. 8 Setting Disk Quotas

9. 9 Determining the Status of Disk Quotas Red traffic light – disk quotas are not enabled. Yellow traffic light – Windows 2000 is rebuilding disk quota information. Green traffic light – the disk quota system is active.

10. 10 Monitoring Disk Quotas Displays the amount of disk space that each user occupies Displays a yellow triangle for users over their quota- warning threshold Displays a red circle for users over their quota limit Displays the warning threshold and disk quota limit for each user

11. 11 Determining Best Uses of Disk Quotas Log on as Administrator to install additional components and applications. Clear the Deny Disk Space To Users Exceeding Quota Limit check box. Set restrictive default limits for all user accounts, and modify if needed. Share disk space equally among all users who share a computer. Set disk quotas on shared volumes, on public folders, and on network servers. Remove all files owned by a user to delete the user’s quota entry.

12. 12 Understanding Encrypting File System (EFS) Allows users to encrypt NTFS files using a strong public key cryptographic scheme Allows users with roaming profiles to use the same key with trusted remote systems Requires no administrative effort to begin Provides backups and copies of encrypted files that are also encrypted Allows you to move or copy files and the files remain encrypted Is not defeated by temporary files created during editing and left unencrypted Provides the ability for you to set policies to recover EFS encrypted data

13. 13 EFS Features Transparent encryption Strong protection of encryption keys Integral data recovery Secure temporary and paging files

14. 14 Encrypting Files and Folders To encrypt files, place them in an encrypted folder. All files placed in an encrypted folder are encrypted. Compressed files cannot be encrypted. A file is encrypted by using file encryption keys. A file is encrypted using a different file encryption key for each block. All of the file encryption keys are stored and encrypted in the file header. Encrypted files are used just like any other file. Encryption is transparent.

15. 15 Decrypting Files and Folders Clear the Encrypt Contents To Secure Data check box. Decrypt a file or folder if people need access to the file or folder.

16. 16 Using the Cipher Command Cipher [/e] [/d] [/s:folder_name] [/a] [/I] [/f] [/q] [/h] [/k] [file_name [...]]

17. 17 Using the Recovery Agent A person is designated as the recovery agent. The administrator of the local computer is the default recovery agent. The domain administrator is the default recovery agent in a domain. The recovery agent can open a file using his or her own private key. If the recovery agent is on another computer, send the file to him or her. A private key should not be copied to another computer.

18. 18 Defragmenting Disks Defragmenting disks is the process of finding and consolidating fragmented files and folders. Defragmenting disks in Windows 2000 is done using the Disk Defragmenter utility. Defragmenting disks has the following goals: Have each file or folder occupy a single contiguous space. Allow your system to access files and folders more efficiently Consolidate free space. Defragmenting disks can be done on FAT, FAT32, and NTFS volumes.

19. 19 The Disk Defragmenter Window Red indicates fragmented files. Dark blue indicates contiguous files. White indicates free space on the volume. Green indicates system files, which cannot be moved. The Analyze button analyzes the disk for defragmentation. The Defragment button defragments the disk.

20. 20 Using Disk Defragmenter Effectively Run Disk Defragmenter when the system will receive the least use. Defragment hard disks at least once a month. Analyze the target volume before you install large applications. Defragment your hard disk after you delete a large number of files.