Data Erasure and Recertification process are done at the same time!!
MTC has designed a highly automated infrastructure in house capable of simultaneously wiping hundreds of hard drives (each rack with 120 drive bays) in compliance with US DoD 5220.22-M data erasure standard. The time it takes to thoroughly erase the data depending on the capacity of the drives instead of the amount of data on the drive.
During the data erasure process, each drive must pass an extensive testing process and comprehensive checkpoints. If a used or defective drive fails to pass any of the checkpoints, the process will stop and the drive will not be certified for future use. If it successfully goes through the whole process, the drive's quality is certified and the data is completed erased at the same time.
However, the certified drive’s reliability depends on the quality standard of the checkpoints of the process, which can be preset according to customer's requirements. The lower quality standard chosen for the process will result in more drives passing the process or recertified but at lower quality and reliability.
A hard drive by nature could last many years with majority of the failures occurring in the first 30 days of initial use, after which it will remain fairly reliable. Therefore, the amount of time the drive has been used before is not the determining factor of the reliability of a recertified drive but the chosen quality standard of the testing process instead.
MTC adopts the highest quality standard for the testing process. Therefore, our certified drives have an average failure rate close to that of a brand new one, which leads to many satisfied customers who have strong faith in our product quality.
The following is some useful information regarding the data erasure:
Most commonly known data erasure standard is DoD 5220.22-M.
It is a software based data sanitation method to overwrite the existing information on a hard drive, SSD and other storage device.
The DoD 5220.22-M is a three-pass data erasure standard:
- Pass 1: Writes a zero and verifies the write
- Pass 2: Writes a one and verifies the write
- Pass 3: Writes a random character and verifies the write
Erasing a hard drive using the DoD 5220.22-M data erasure standard prevents all software and hardware based file recovery methods from lifting information from the drive.
The DoD 5220.22-M sanitization method was originally defined by the US National Industrial Security Program (NISP) in the National Industrial Security Program Operating Manual (NISPOM) and is one of the most common sanitization methods used in data destruction software.
MTC's data erasure program support multiple data sanitization methods in addition to DoD 5220.22-M.