Intelligent Destruction is a thorough data destruction method for SSD that fully comply with the military standard. FLEXXON 2.5” SSD supports Intelligent Destruction, which could destroy all the data quickly and completely.
The P13 pin on the SATA connector is defined as an intelligent destruction trigger signal, which is triggered by an active-low signal as displayed in Figure 1. In a low-level pulse of the width of at least 2s, the data destruction process is executed at any working status of SSD. The data cannot be recovered after intelligent destruction but the SSD can be reused after running a format operation. P14 is defined as monitoring pin during the intelligent destruction. The data destruction process can be viewed by connecting a LED to the positive power supply.
FLEXXON SSD applies three-level destruction method in data destruction.
Step 1: Erase the key
The key for each SSD is generated randomly, therefore the data becomes ciphertext after the data is being destroyed. As the key file size is small, the process to erase the file is within 5ms only.
Step 2: Erase the mapping table
The mapping table is the most crucial system file for SSD, whose size is relative to the capacity of SSD. The size of the mapping table for a regular SSD is commonly in the range of 1MB ~ 1GB. After the removal of the mapping table, the data stored becomes meaningless 0 and 1. It cannot be restructured into a file or other valid data. It requires less than 1 second for the erase of the mapping table.
Step 3: Erase the data
Different from magnetic medium, NAND Flash is used as SSD storage medium. During data destruction, the deletion of storage units does not need to be taken place one by one. The positive charges are inserted into block to remove the negative charges and therefore quickly erase the data.
After full disk data erase, SSD will have no usable data.
Different from magnetic medium, the storage medium of SSD is Nand Flash without memory effect. The data can be reliably and thoroughly removed after this step.
Step 4: Repeatedly erase data.
Data erasure also requires to be carried out repeatedly after the data is removed, according to the military data destruction standards.
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