This core principle holds true whether you are using a modern NVMe SSD, a traditional SATA SSD, or a mechanical hard drive. The operating system installer does not automatically search for or affect drives that you do not explicitly target.
To perform this type of selective clean install, you will boot from your installation media and follow these steps:
You have:
Many users confuse "clean install" with "low-level format" or "zero-fill wipe." does clean install wipe all drives exclusive
If you cannot physically disconnect internal drives (such as in modern laptops), boot into your current OS before the install. Open (Windows) or Disk Utility (macOS) and write down the exact storage capacity (e.g., 465.8 GB) and the volume labels of your drives. This allows you to positively identify the correct drive during setup. Step 4: Run the Installer Custom Setup
Short answer: No — a clean install typically only formats or overwrites the drive/partition you choose, not every drive attached to the system. However, whether other drives are affected depends on the installer, your actions, and the operating system. Read the rest for specifics and safe procedures.
In some cases, data recovery may be impossible. If the drive has been cleaned using the DiskPart clean command, all partitions and data have been deleted in a process that cannot be undone. One Microsoft responder noted that "sadly, it is most likely going to be impossible to recover the data" after a clean command has been issued. This core principle holds true whether you are
A clean install does not exclusively wipe all drives on your computer; it only formats the specific drive you select for the new operating system. However, because the installation process exposes all connected storage to potential formatting, the risk of accidental data loss caused by user error remains high. By backing up your files and physically disconnecting secondary drives before formatting, you can execute a flawless clean install without risking your valuable data.
Never rely solely on the promise that the installer won't touch your secondary drives.
Click or Format only on those specific system partitions. Open (Windows) or Disk Utility (macOS) and write
Here is the breakdown:
Do you have or just one disk split into partitions ?