What is the function of a write-blocker?

The function of a write-blocker is to prevent any writing to a storage device during the imaging process. When conducting forensic examinations, it is critical to maintain the integrity of the original evidence. A write-blocker ensures that while data is being copied from a hard drive or storage device, no alterations can be made to the original data, thus preserving its authenticity for legal and investigative purposes.

This is vital in forensic investigations because any modification to the data could compromise the evidence and potentially lead to legal challenges. By using a write-blocker, forensic examiners can create a bit-for-bit copy of the data on a storage device without any risk of accidentally writing over or altering the original content. This capability is fundamental to maintaining the chain of custody and ensuring that the findings from the forensic analysis are reliable and valid.