Boasting a faster data throughput and higher bandwidth than HDDs, SSD’s prevalence is continuing to increase interest and enquiries about SSD data erasure. This blog discusses how to safely wipe SSD data with Secudrive Drive Eraser solution.
HDDs data erasure method does not delete the actual data in the disk but disconnects it from its disk data location metadata and overwriting the disk space with meaningless data.
Physically, SSDs are very difficult to run data erasures unlike HDDs. SSDs are equipped with multiple NAND flash memories that are consolidated into a single space to create data storage. The basic unit of an SSD consists of small silicone structures called cells. The collection of cells is called a page, and the collection of these pages is called a block.
SSDs can rewrite data on a page only after the data on the mounted NAND flash memory space has been deleted and emptied. The special characteristic of SSDs is that you need to empty the recorded data on a non-empty page before writing the next data.
On top of that, the read/write of the SSD occurs on a per-page basis, but erasing is possible only on a per-block basis. In order to rerecord data on a particular page, the deletion of the block unit (including other pages) to which the page belongs must precede. Considering that SSDs have a limited number of writes/erases, erasing entire blocks to rewrite a single page shortens the life of the SSD.
To prevent this, SSDs are equipped with ‘wear-leveling’ technology. It ensures that the data is distributed and written across the NAND flash memory. Instead of concentrating the writing and erasing of data on a particular block, the block is marked as “unrecognized” and the data is written as a modified file in another block. Because all of this happens at a very lower layer of disk electromagnetism, the OS is not aware of the process. For this reason, data erasure by overwriting on an SSD poses the risk of hidden data remaining in unforeseen areas of the disk.
Secudrive Drive Eraser uses the “Secure Erase” method by issuing a firmware command to initialize the SSD. The erasure process takes approximately 10 seconds and is designed to manage the results of the sanitization operation with detailed logs and PDF reports. In addition, the report tamper-proof feature prevents potential security threats.
Secudrive Drive Eraser is, by far, the best option for a secure and flawless SSD data sanitization.