Is it possible, with modern, or easily foreseeable technology, to build a compact digital data storage device that cannot be erased without removing the data store? The storage in question to be used to blackbox data on a spacecraft.
Answers should use examples of any and all of:
- currently prototype systems
- existing data storage
- and/or those used historically
The aim is to have a storage system from which data, once recorded, cannot be removed without completely removing the storage core of the system, that is to say that the recording medium is physically and indelibly write only. Data cannot be overwritten or erased by the system or by outside interference and should last as long as possible at Normal Temperature and Pressure (20°C and 1 atmosphere) and 45% relative humidity. I had considered these little babies but they can not only be overwritten they can also be annealed at high temperature to erase them completely. Assume that anyone who is going to be trying to read these systems will know the encoding system used and have the technology to read them, I'm looking for an indelible record, I do realise that on any long enough time scale encoding will shift and data will become unreadable.