Data recovery is performed in a sterile cleanroom environment that meets ISO standards of minimized contamination for maximum results. ISO Certifications refer to the maximum number of particulates in a cleanroom. The most common one is the ISO 5 Class 100, which allows up to 100,000 particulates per m3.
The higher certifications include ISO 4 Class 10, which allows a maximum 10,000 particulates per m3, and ISO 3 Class 1, which allows 1,000 particulates per m3. There are also ISO 2 and ISO 1 certificates, which allow for maximums of 100 and 10 particulates per m3, respectively.
However, when selecting the best data recovery companies, we consider ISO 5 the minimum and most objective certification because these certifications aren’t technically required for data recovery cleaning rooms. Of course, the companies with higher certifications are included—however, their services usually come at a higher price because of the company’s maintenance expenses.
Beyond checking whether the company has a certification or not, we also take notice of the dates of the latest mandatory testing. As per ISO standards, the frequency of mandatory testing is 12 months for Air Pressure Difference and Airflow and 6 months for Particle Count tests. Anything beyond this raises a red flag as it might mean that the data recovery company has either lost or hasn’t renewed their certification.