220-1102 Operational Procedures Practice Question
A technician is decommissioning a server that contained confidential client data. The hard drives will be donated to a local school. Which of the following data destruction methods is the MOST appropriate to ensure the data is unrecoverable?
⚠ Common exam trap
Watch out — candidates often confuse degaussing with secure erasure, not realizing that degaussing physically destroys the drive's ability to function, while Secure Erase preserves the drive for reuse while ensuring data is unrecoverable.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Secure Erase
Secure Erase (C) is the most appropriate method because it uses the ATA Secure Erase command built into the drive firmware to overwrite all user-accessible sectors, including reallocated and hidden sectors, making data recovery infeasible. This ensures the confidential client data is unrecoverable before donating the drives, meeting both security and reuse requirements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Quick format
Why it's wrong here
A quick format on an NTFS or FAT volume only rebuilds the file system metadata (e.g., $MFT, FAT, boot sector) and marks the volume as empty; it does not overwrite the actual data payload in disk sectors. The original confidential files remain physically present and are trivially recoverable with tools like TestDisk or PhotoRec. Therefore, quick formatting provides no real sanitization assurance for decommissioning and cannot be used if data security is required.
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Degaussing
Why it's wrong here
Degaussing uses an intense magnetic field to randomize or neutralize the magnetic domains on platters, which can effectively destroy data on traditional HDDs. However, the same field also destroys the drive's servo tracks and factory-written format markings, making the hard disk physically unusable and unable to spin up or be recognized. If the decommissioning plan calls for reusing or donating the server drives, degaussing is inappropriate; it is a destroy-only method, not a data-sanitization-plus-reuse method.
- ✓
Secure Erase
Why this is correct
Secure Erase is a built-in ATA command that instructs the drive's firmware to overwrite every addressable sector, including the HPA (Host Protected Area), DCO (Device Configuration Overlay), and reallocated sectors that the operating system cannot normally access. Because the command is executed inside the drive firmware, it bypasses file-system abstractions and is far more thorough than OS-level formatting or overwrites. After completion, the drive is left fully functional and reusable, making it the correct choice when confidential data must be irrecoverably removed without destroying the hardware.
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Delete the partitions
Why it's wrong here
Deleting the partitions on a disk only removes the GPT or MBR partition entries that map logical regions on the disk; it does not overwrite or erase the underlying sectors, file tables, or file contents. The raw data—including customer records, financial files, and other confidential data—remains intact and easily recoverable with partition-recovery or forensic tools. This action is essentially the inverse of creating a partition and provides zero protection against unauthorized data recovery; it is not a valid data-destruction method.
Go deeper
Related to this question
Learn chapter
BitLocker Drive Encryption
Key term
Recovery
Recovery is the process of restoring systems, data, and operations after a security incident, failure, or disaster to return to normal functioning.
Key term
Security
Security in IT is the practice of protecting systems, networks, and data from unauthorized access, damage, or theft.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1102 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1102 exam.