Other than magnetic tape, what storage medium boasts a high resilience to outright failure over long periods of time?
Bitrot to a degree is acceptable but total device failure is not, capacity need only be 4GB capacity. Device will be nearline WORM intended to protect metadata.
Was investigating old flash memory with larger cells like compact flash for this task but wanted input from you guys.
Reduncancy is the best solution. Having your data backed up on multiple media is more reliable than any one format.
>>61809950
I will keep two separate devices with intraspaced redundancy to repair stored metadata and mirror two of them for device level redundancy but the internet seems devoid of any reliability stats on older flash memory like CF and barring the write cycle issue I wanted to know if they're a safe bet for storing cold and periodically rotating to refresh the cells and repair flipped bits in a small amount of data.
>>61809929
Have you looked at M-Disc?
>>61809929
Try looking down the stack a layer or two. Micron technical note 12-30, revised September 2015, is excellent reading about the longevity and endurance properties of their NOR flash.
In short, keeping it cool is important. It's probably a good idea to erase and rewrite everything once every 1-6 months to eliminate the chance of bitrot.
Thus, you could probably preserve data for decades, if not centuries.