Should You Scan the Whole Disk or Only One Partition?

Yvette Bonnet updated Jul 08, 26

5 min(s)

TL;DR:

Start with a partition scan for simple file deletions on a known, visible volume, but switch to a whole disk scan using tools like Recoverit Partition Recovery if the drive is RAW, unallocated, missing partitions, or reformatted.
    ● Whole disk scans take longer and frequently return older deleted files, duplicate entries, and fragmented data, requiring you to filter results by file type, original path, date, and size.
    ● You must recover and save the selected files to a different drive, as saving them back to the source disk can overwrite remaining recoverable data.
    ● Stop repeated scans and check the device condition if the drive makes unusual noises, disconnects frequently, or freezes due to potential bad sectors or hardware instability.

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Scanning one partition is usually the better first step when file loss is limited to a known volume. Scanning the whole disk is more useful when partitions are missing, the partition table is damaged, the disk shows as RAW or unallocated, or the original file location is unclear. The right choice depends on how the disk is detected and where the lost files were originally stored.

Option	Best For	Limitation
Partition scan	Deleted files from a known drive letter or visible volume	May miss data outside that partition
Whole disk scan	Lost partitions, RAW disks, damaged partition tables, or unclear file location	Takes longer and may return mixed or duplicate results
Whole disk scan after formatting	Formatted drives where the partition layout changed	Original file paths and names may be incomplete
Whole disk scan on external storage	External drives with multiple partitions or uncertain file history	May include older deleted files, fragments, and duplicate entries

Step 1
Check how the disk appears in Disk Management or Disk Utility. If the partition is visible and the lost files came from that volume, start with a partition scan.
Step 2
Use a partition scan first for simple deletion from one known drive letter or volume. Results are usually faster to review and more likely to preserve the original folder structure.
Step 3
Switch to a whole disk scan if the partition is missing, RAW, unallocated, resized, reformatted, or shown with the wrong capacity. A full scan can search areas outside the current visible partition.
Step 4
Preview and filter scan results before recovery. Sort by file type, path, date, size, and scan source to separate current files, deleted files, and older partition records.
Step 5
Recover selected files to a different drive. Saving results back to the source disk can overwrite remaining recoverable data.

Common Issues and Fixes

Partition scan finds nothing: likely cause is a damaged, deleted, or changed partition; fix by scanning the whole disk instead of only the visible volume.
Whole disk scan returns too many files: likely cause is old file system traces from multiple partitions; fix by filtering by file type, date, size, original path, and known filenames.
Recovered files will not open: likely cause is partial overwrite, bad sectors, or incomplete recovery; fix by previewing files first and checking alternate recovered versions.
Disk shows as RAW or unallocated: likely cause is partition table damage, formatting, or file system corruption; fix by running a whole disk scan before attempting repair writes.
Scan stops or freezes: likely cause is bad sectors or hardware instability; fix by reducing use, considering a disk image workflow, and seeking professional diagnosis if the files are critical.

Quick Tips

A partition scan is often enough after simple deletion from a known volume, but it may miss files after repartitioning, formatting, or partition loss.
Whole disk scanning can find older deleted data from previous partitions, so duplicate names, fragments, and incomplete folders are common.
Recovery success is less predictable after new data has been written to the same disk.
For encrypted drives, recovery depends on whether the original volume can still be unlocked with the correct password, key, or account access.
If the drive makes unusual noises, disconnects often, or becomes extremely slow, stop repeated scans and check the device condition first.

💡Protip:

Start with the smallest accurate scan area. Use a partition scan when the lost files came from a visible volume, but choose a whole disk scan when the partition is missing, RAW, unallocated, resized, or uncertain; this keeps results cleaner while still covering lost partition cases.