Which Backup Type Recovers the Entire OS and System?
A systems administrator wants to implement a backup solution. The solution needs to allow recovery of the entire system, including the operating system, in case of a disaster. Which of the following backup types should the administrator consider?
Community Votes
100% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
Tests the distinction between file-level backup strategies and system-level restoration, with the common trap being confusion over incremental methods that lack bootable OS components.
Disk imaging captures a complete system snapshot to guarantee full OS and application restoration after failure. This page establishes that an image backup is the only listed method capable of standalone disaster recovery.
Incremental backups are frequently selected because they are standard in daily routines, but they cannot restore an unbootable operating system without a preceding full baseline image.
Community Discussion (4 comments)
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Expert Analysis
Why the Answer Is Correct
Image backups create a sector-by-sector duplicate of an entire volume, capturing the bootloader, partition table, operating system, installed software, and user configurations. Because it contains every component required to boot and run the machine, it directly satisfies the requirement for complete disaster recovery. Restoring an image bypasses the need for manual application reinstallation or dealing with configuration drift.Why the Other Options Are Wrong
Incremental and differential backups only track changed blocks or files since a baseline, meaning they lack the foundational OS components needed to boot a crashed system independently. SAN refers to a high-speed network infrastructure for block-level storage access, not a backup methodology or strategy. Neither approach addresses the explicit requirement to recover the operating system itself from a single solution type.Community Comment Notes
Learners consistently highlight that imaging provides a complete snapshot capable of redeploying the OS quickly without reinstalling patches or third-party software. Several users note that while incremental and differential methods efficiently save space, they rely on a full baseline and cannot standalone restore a failed boot environment. Contributors emphasize that a system image essentially replaces a crashed drive and restores the exact previous state.Exam Strategy
When evaluating backup requirements, always distinguish between data-level strategies (incremental, differential, full) and system-level strategies (imaging). If the objective mentions recovering the OS, hardware state, or bootability, prioritize imaging over file-based backup schedules.
Frequently Asked Questions
Can incremental backups restore a corrupted operating system?
No, incremental backups only store changes made after a full backup and lack the foundational OS files needed to boot a crashed system.
Is a SAN considered a backup type?
No, a Storage Area Network is a dedicated high-speed storage infrastructure, not a data protection methodology or backup strategy.