Module 11: Managing Data Storage

Overview Managing File Compression Configuring File Encryption Configuring EFS Recovery Agents Implementing Disk Quotas

Lesson: Managing File Compression What Is File Compression? What Is the compact Command? What Are the Effects of Moving and Copying Compressed Files and Folders? Best Practices for Compressing Files or Folders Practice: Managing File Compression

What Is File Compression? Use compression to save disk space Do not use compression for system files and folders Compression is configured as an NTFS attribute NTFS calculates disk space based on uncompressed file size Compressed (zipped) folders are also compressed File A File B

What Is the compact Command? A command-line tool for compressing files and folders Provides a good overview of compression states Allows multiple file names and wildcards

What Are the Effects of Moving and Copying Compressed Files and Folders? From NTFS Partition To FAT Partition D To NTFS Partitions From NTFS Partitions C Within an NTFS Partition B A Inherits Retains Inherits No Compression CopyMove CopyMoveCopyMove

Best Practices for Compressing Files or Folders Identify files that will benefit from compression Do not compress system files Do not compress already-compressed files Compress static data rather than data that changes frequently

Practice: Managing File Compression In this practice, you will: Compress files Move and copy compressed files

Lesson: Configuring File Encryption What Is EFS Encryption? What Is Public-Key Encryption? How EFS Uses Encryption How EFS Uses Certificates What Are the Effects of Moving and Copying Encrypted Files or Folders? Sharing an Encrypted Folder Practice: Configuring File Encryption

What Is EFS Encryption? EFS encryption makes data unintelligible without a decryption key EFS encrypts data Encryption keys are automatically generated if required Opening and saving encrypted files is transparent to users Use the cipher command to display or alter encryption of folders and files on NTFS volumes EFS encrypts data Encryption keys are automatically generated if required Opening and saving encrypted files is transparent to users Use the cipher command to display or alter encryption of folders and files on NTFS volumes

What Is Public-Key Encryption? Public key Private key Certification authorities Automated certificate creation

How EFS Uses Encryption Symmetric encryption protects the file  Symmetric encryption is strong and fast Public-key encryption protects the symmetric key  A copy is stored for each user  A copy is stored for the recovery agent

How EFS Uses Certificates Certificate identifies user EFS generates a certificate  Requests from CA  Self-signed if CA not available EFS renews certificates if required

What Are the Effects of Moving and Copying Encrypted Files and Folders? Encrypted Folder to Unencrypted Folder C Unencrypted File to Encrypted Folder B Unencrypted Folder to Encrypted Folder A = Move = Copy =

Sharing Encrypted Files Encrypted files can be shared with local, domain, and trusted domain users Groups cannot be authorized for access Any user with access can add other users Self-signed certificates are difficult for sharing

Practice: Configuring File Encryption In this practice, you will: Encrypt a folder Share an encrypted file Identify the effects of moving and copying compressed files and folders

Lesson: Configuring EFS Recovery Agents What Is an EFS Recovery Agent? Recovering Encrypted Files Practice: Configuring EFS Recovery Agents

What Is an EFS Recovery Agent? Authorized to decrypt data Required when users are deleted Required when local user passwords are reset The recovery key can be exported

Recovering Encrypted Files Log on as recovery agent Recovery policies define the recovery agent Default recovery agent is the domain Administrator account Back up the recovery key

Practice: Configuring EFS Recovery Agents In this practice, you will: Configure an EFS recovery agent Export an EFS recovery certificate

Lesson: Implementing Disk Quotas Multimedia: What Are Disk Quotas? What Are Disk-Quota Settings? Practice: Implementing Disk Quotas

Multimedia: What Are Disk Quotas? This presentation explains the use of disk quotas as a method for managing data storage space and illustrates how disk quotas operate After viewing this presentation, you will be able to explain how to use disk quotas

What Are Disk-Quota Settings? Track and control user NTFS volume space Restrict storage to quotas Trigger log events Calculated with uncompressed file size Quota entries Track and control user NTFS volume space Restrict storage to quotas Trigger log events Calculated with uncompressed file size Quota entries

Practice: Configuring Quota Limits In this practice, you will: Configure quota limits Add a quota entry

Lab: Managing Data Storage In this lab, you will: Troubleshoot disk-quota entries Recover an encrypted file