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Ch. 7: Advanced File Management System PowerPoint Presentation
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Ch. 7: Advanced File Management System

Ch. 7: Advanced File Management System

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Ch. 7: Advanced File Management System

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  1. Ch. 7: Advanced File Management System MIS 431 Created Spring 2006 MIS 431 Chapter 7

  2. Overview • Configure file and folder attributes • Configure advanced file/folder attributes accessible via NTFS • Management disk quotas • Implement the Distributed File System MIS 431 Chapter 7

  3. File and Folder Attributes • Read-only: contents cannot be changed • But a user can change the attribute so it is not a guarantee! • Set from the General tab (Fig 7-1 p.259) • Archive: file has changed since the last time it was “officially” backed up therefore should be backed up again • Especially helpful when doing an incremental or partial backup (e.g., only back up files that have changed since the last full backup done) MIS 431 Chapter 7

  4. More File & Folder Attributes • System – not used consistently now but was used to designate system files in MS-DOS folders. • If Hidden and System are checked, the files are treated as “protected operating system files (or folders)” • Hidden – causes file to not display in Windows Explorer. • But they do appear with a transparent icon unless the System is also checked in which case they don’t appear at all. • Act 7-1: Viewing & Configuring File and Folder Attributes using Windows Explorer MIS 431 Chapter 7

  5. File and Folder Attributes, contd. • ATTRIB command – from the command prompt to display, add, or subtract attributes for a file or folder. • Ex: D:\ATTRIB d:\docs\text.txt (displays) • D:\ATTRIB +A +S +H +R d:\docs\text.txt will remove all of the attributes listed (A S H R) • Act 7-2: Changing file attributes using the ATTRIB command MIS 431 Chapter 7

  6. Advanced Attributes • Stored on NTFS partitions or volumes • Access: click Advanced button on General tab • See Fig 7-9 p.268 • Archive and Index attributes (top box) • “Folder is ready for archiving” • Will do for entire folder, not just one file • “For fast searching … allow indexing .…” • The index is built and maintained in the background • When a file is needed, the searching goes much faster to search the index and not the whole directory MIS 431 Chapter 7

  7. Advanced Attributes, contd. • File compression attribute – reduces actual storage space required on the drive • In old days, slowed the system down • With fast CPUs, it can speed things up: less data is written and subsequently read, and the fast CPU decompresses it on the fly • COMPACT command line utility • If a file is copied, it remains compressed. MIS 431 Chapter 7

  8. Advanced Attributes, contd. • Encrypt contents – secures data by encrypting with “private” file encryption key • For recovery WS03 serves as the data recovery agent • In event of loss of the individual’s private key, WS03 retains a backup key to decrypt. • If file is copied to an unencrypted folder or volume, encryption travels with the file so long as the folder is NTFS • CIPHER – command line utility to encrypt MIS 431 Chapter 7

  9. Disk Quotas • Advantages • Prevents users from consuming all available disk space • Encourages users to delete old files as they reach their disk quota • Allows an administrator to track disk usage for future planning • Allows admins to track when users are reaching their limits • Disabled by default • Can establish total disk quote for a volume, not just individual user space MIS 431 Chapter 7

  10. Disk Quotas, contd. • Can limit space OR just give a warning message to the user (but not prevent them from exceeding the quota) • Can create a log entry when user exceeds limit • Can give different limits to each user • Can set limit and warning levels differently • FSUTIL QUOTA at the command line prompt MIS 431 Chapter 7

  11. DFS – Distributed File System • Allows admin to set up a simpler (to view) shared file system as though they reside in a single hierarchical structure • Thus users don’t need to know which server their shares are on • Allows logical growth of system • See Fig 7-22 p.285 • Two DFS models • Standalone DFS – stored on 1 server • Domain-based DFS model in AD (where else?) • User must be using DFS client software MIS 431 Chapter 7

  12. DFS, contd. • DFS topology or structure • DFS root: main container holding links to shared folders; host server is the server holding this container • DFS link: pointer to the physical location • Replica set: set of folders copied to one or more servers that participates in replication • Can set up replication for every n (~15) minutes MIS 431 Chapter 7

  13. Managing DFS • Tasks to managing DFS • Deleting a DFS root • Removing a DFS link • Adding root and link replica sets • Checking the status of a root or link • Use Distributed File System MMC (or create a custom MMC with desired tool set) – found in Administrative Tools • To start, click Action and Create New Root MIS 431 Chapter 7