File System Overview and Types
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Questions and Answers

What term describes the entire file tree from the root directory downward?

  • File hierarchy
  • File system (correct)
  • File directory
  • File structure

Which system architecture provides a standard interface for different file system types?

  • Network File System (NFS)
  • Redundant Array of Independent Disks (RAID)
  • Distributed File System (DFS)
  • Virtual File System (VFS) (correct)

What is one of the primary administrative tasks concerning the file system?

  • File encryption
  • File sharing
  • File compression
  • File system administration (correct)

Which type of file system is typically stored on physical media?

<p>Disk-based (D)</p> Signup and view all the answers

Which component of file system commands applies specifically to one type of file system?

<p>Specific component (B)</p> Signup and view all the answers

What is one of the activities involved in maintaining file systems?

<p>Checking for and correcting file system damage (B)</p> Signup and view all the answers

What does mounting a file system involve?

<p>Making the file system accessible in the main file tree (D)</p> Signup and view all the answers

Which command category applies to most types of file systems?

<p>Generic commands (A)</p> Signup and view all the answers

What is the main characteristic of HSFS file systems?

<p>They are typically associated with CD-ROMs and are read-only. (D)</p> Signup and view all the answers

What does the TMPFS file system primarily use for temporary data storage?

<p>Swap space. (D)</p> Signup and view all the answers

Which file system is specifically designed to support access to kernel information and facilities?

<p>PROCFS (B)</p> Signup and view all the answers

What can occur if a system with TMPFS does not have adequate swap space?

<p>The TMPFS file system can run out of space. (B)</p> Signup and view all the answers

Which file system is used to create a virtual file system with an alternative path name?

<p>LOFS (A)</p> Signup and view all the answers

Which type of file system provides support for different operating systems to share files seamlessly?

<p>NFS (B)</p> Signup and view all the answers

What happens to files in a TMPFS file system when the system is shut down?

<p>They are deleted. (B)</p> Signup and view all the answers

What is a primary advantage of using Cache File Systems?

<p>They improve the performance of remote file systems. (C)</p> Signup and view all the answers

What is the default file system type for the /tmp directory in the SunOS system software?

<p>TMPFS (A)</p> Signup and view all the answers

Which command is used to share a resource across a network in a distributed file system?

<p>share (B)</p> Signup and view all the answers

What is the primary association for the PCFS file system?

<p>DOS-formatted disks (B)</p> Signup and view all the answers

What file system allows processes to access common data via named pipes?

<p>FIFOFS (A)</p> Signup and view all the answers

Which of the following is NOT a characteristic of NFS?

<p>It requires that every file be copied to each system. (D)</p> Signup and view all the answers

What does the PROCFS file system enable for debugging tools?

<p>Access to the address space of processes. (D)</p> Signup and view all the answers

Flashcards

What is a file system?

A file system is a structured way of organizing and storing files within a computer. It acts like a directory system, allowing you to easily locate and manage your files. It is essential for keeping your data organized and accessible.

How does a file system work?

A file system uses a hierarchical structure, like a tree, with a root directory at the top. This root directory branches out into folders and subfolders, allowing you to create a logical organization for your files. Files are then placed within these folders, making them easily retrievable.

What is VFS?

VFS (Virtual File System) is a standard interface that allows different file system types to work seamlessly within an operating system like Solaris.

What are the types of file systems?

There are three main types: Disk-based, Network-based, and Pseudo. Disk-based file systems store data directly on physical hard drives or other media. Network-based file systems store data on servers accessible across a network. Pseudo file systems are designed for specific purposes, like storing temporary data or managing system resources.

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What are the benefits of using a file system?

File systems offer several advantages: They provide an organized way to manage files, making it easier to find and access them. They also improve security by allowing access permissions to be set for different users or groups.

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Why is file system administration important?

File system administration is crucial for maintaining the integrity and performance of your computer system. It involves tasks like mounting and unmounting file systems, creating backups, and checking for errors, ensuring data is safe and accessible.

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What are some important file system administration tasks?

Administrators often perform these tasks: Mounting and unmounting file systems to make data accessible, configuring new storage devices, creating backup schedules to protect data, checking for file system corruption and repairing it, among others.

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What are disk-based file systems?

Disk-based file systems are designed to store data on physical storage devices such as hard disks, CD-ROMs, and diskettes. These are the most common type of file systems used in computers.

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What are the major types of file systems in SunOS?

SunOS supports three major types of file systems: disk-based, network-based, and pseudo.

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What is a disk-based file system?

A file system stored on a physical storage device, like a hard drive or CD-ROM.

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What is a network-based file system?

A file system accessed over a network, allowing files to be shared between systems.

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What is a pseudo file system?

A virtual or memory-based file system that provides access to special kernel information and facilities.

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What is the Cache File System?

A pseudo file system that uses a file system to contain a cache, improving performance of remote file systems or slow devices.

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What is the TMPFS file system?

A pseudo file system that uses local memory for file system reads and writes, offering faster access than traditional file systems.

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What is the LOFS file system?

A pseudo file system that allows the creation of a new virtual file system with an alternative path name.

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What is the PROCFS file system?

A pseudo file system that resides in memory and contains information about active processes.

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What are the main commands for file system administration?

File system administration uses generic commands that call file system-specific components.

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What is the purpose of NFS in a multi-platform environment?

NFS allows systems running different operating systems to share files, such as DOS and UNIX systems.

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How does NFS make file location irrelevant to users?

NFS allows users to access files regardless of their physical location, making the file system appear as a single shared resource.

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Study Notes

File System Overview

  • A file system structures directories for locating and storing files.
  • It can describe the entire file tree, a specific file system type (disk-based, network-based, or pseudo), a data structure, or a portion attached to a mount point.
  • Solaris uses Virtual File System (VFS) for a standard interface between different file system types.

File System Types

  • Disk-based: Stored on physical media (hard disks, CD-ROMs, diskettes).
    • Formats include UFS (default SunOS), HSFS (CD-ROM, read-only), and PCFS (DOS-formatted disks).
    • UFS is used with hard disks, HSFS with CD-ROMs, PCFS with diskettes.
  • Network-based: Accessed over a network.
    • NFS is the only available network-based file system in SunOS.
    • Administered by exporting from a server and mounting on other systems.
  • Pseudo: Virtual or memory-based, accessing kernel information.
    • TMPFS (temporary file system): uses local memory (fast), not permanent, default for /tmp
    • LOFS: Creates virtual file systems; allows alternative path names (e.g., duplicating file systems).
    • PROCFS: Stores active processes in /proc, accessed by commands like ps.
    • Other pseudo file systems (FIFOFS, FDFS, NAMEFS) are used by different operating system functionalities.

File System Administration

  • Key tasks include making local and remote files available, connecting/configuring devices, backing up/restoring files, checking for damage.
  • Checking file system integrity is usually done during boot.
  • Commands have generic components (apply to most types) and file-system-specific components (apply to one type).
  • Administering distributed file systems (e.g., NFS) involves exporting them and mounting them on individual systems.
  • Configuring shared resources (e.g., NFS) involves using commands like "share" or adding entries to /etc/dfs/dfstab. Entries must include syntax for pathname.

File System Performance

  • Cache File Systems (e.g., tmpfs): store data read from a remote system or slow device (e.g.,CD-ROM) on the local system, improving performance of remote or slow devices.
  • TMPFS uses local memory, offering significantly faster access to temporary files compared to disk-based file systems.
  • Files in TMPFS are not permanent, deleting when unmounted.

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Description

This quiz covers the structure and types of file systems, including disk-based, network-based, and pseudo file systems. Learn about Virtual File System (VFS) in Solaris and the formats used for different storage media. Test your understanding of how file systems are organized and accessed in various environments.

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