Home > Glossary > CompTIA A+ Certification Exam Core 2 > Disk Imaging

📖 What is Disk Imaging?

Disk Imaging is the process of creating an exact, sector-by-sector copy of a hard disk drive or partition. Unlike a file backup, an image includes the operating system, boot sectors, and all installed applications for rapid system recovery.

🥋 Sensei Says:

"Distinguish this from 'File Backup'. Imaging is for full disaster recovery, while file backup is for protecting specific user data."

📚 Certification: CompTIA A+ Certification Exam Core 2 (220-1102)

🔑 What are the Key Concepts of Disk Imaging?

▸ Sector-by-sector copying ensures that the entire drive, including the Master Boot Record and hidden partitions, is captured for a complete and accurate restoration.
▸ Bare-metal recovery allows a technician to restore a full system image to a brand new, unformatted hard drive without needing a pre-installed operating system.
▸ Golden Images are standardized templates used by administrators to deploy a consistent operating system and software suite across multiple corporate workstations efficiently.
▸ Unlike file-level backups, disk imaging captures the system state, including the registry and boot configuration, enabling rapid recovery after a total drive failure.

🎯 How does Disk Imaging appear on the 220-1102 Exam?

You may be asked to identify the most efficient method for deploying a standardized set of software and OS configurations to twenty new laptops in a corporate office to ensure consistency.

A scenario might describe a catastrophic hard drive failure where the technician must restore the entire environment, including the OS and boot sectors, to a new disk to minimize downtime.

❓ Frequently Asked Questions

Can I restore a single file from a disk image?

Yes, most professional imaging tools allow you to mount the image as a virtual drive, enabling you to browse and extract specific files without performing a full system restore.

Why is disk imaging more storage-intensive than file backups?

Imaging captures every sector of the disk, including the operating system and often empty space, whereas file backups only copy specific data, resulting in much larger image files.

Related Terms from CompTIA A+ Certification Exam Core 2

Multimeter Common Connectors (RJ45, USB, BNC) Video Memory (VRAM) Heat Sink Bluetooth S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology)

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