CHFI Storage Forensics and File System Analysis Practice Question
A forensic analyst is examining a USB flash drive formatted with the FAT32 file system. The analyst needs to determine the total number of sectors in a cluster and the number of reserved sectors. Which of the following structures in the FAT32 file system contains this information?
⚠ Common exam trap
The trap here is assuming that the FSInfo sector or the FAT contains file system geometry, when those details are actually stored in the boot sector's BIOS Parameter Block.
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
✓
The boot sector (also known as the Volume Boot Record), which contains the BIOS Parameter Block with fields for sectors per cluster and reserved sector count.
In FAT32, the boot sector contains the BIOS Parameter Block (BPB), which defines the file system's geometry, including sectors per cluster and reserved sector count. These values are essential for interpreting the FAT and locating data. The FAT itself holds cluster chain information, the root directory stores file entries, and the FSInfo sector provides free cluster hints. Only the boot sector provides the authoritative file system parameters needed for forensic analysis.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The root directory entry, which contains metadata about the file system including cluster size and reserved sector count.
Why it's wrong here
The root directory in FAT32 is a regular directory that stores file and folder entries, not file system geometry. It does not contain the cluster size or reserved sector count. Those parameters are defined in the boot sector. The root directory is used to locate files and subdirectories, but it does not hold configuration data about the volume layout.
- ✓
The boot sector (also known as the Volume Boot Record), which contains the BIOS Parameter Block with fields for sectors per cluster and reserved sector count.
Why this is correct
The boot sector of a FAT32 volume contains the BIOS Parameter Block (BPB), which includes critical file system geometry such as bytes per sector, sectors per cluster, number of reserved sectors, number of FATs, and total sectors. Forensic analysts can parse the BPB to determine cluster size and reserved sectors, which are essential for navigating the file system and recovering data.
- ✗
The FAT (File Allocation Table) itself, which stores cluster chain information and also includes the total sector count in its header.
Why it's wrong here
The FAT stores cluster chain information, indicating which clusters are allocated to files and which are free. It does not contain the total number of sectors in a cluster or the number of reserved sectors. Those values are part of the file system metadata stored in the boot sector, not in the FAT. The FAT is a linked list of cluster entries and does not include geometry information.
- ✗
The FSInfo sector, which stores the total number of sectors and the number of free clusters, and also includes the cluster size.
Why it's wrong here
The FSInfo sector in FAT32 provides hints about the number of free clusters and the next free cluster, but it does not contain the total number of sectors in a cluster or the reserved sector count. Those values are in the boot sector. The FSInfo sector is used for performance optimization and may not always be accurate, so it is not the authoritative source for file system geometry.
Go deeper
Related to this question
About these practice questions
Courseiva writes every CHFI question from scratch — 745 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official EC-Council exam blueprint
This CHFI practice question is part of Courseiva's free EC-Council 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 CHFI exam.