4 ms·
DVDs use Reed–Solomon coding, so they effectively store a hash and recovery data for you. When a sector is irrecoverable, reading that sector fails.
by dehrmann 8mo ago
DVDs use Reed–Solomon coding, so they effectively store a hash and recovery data for you. When a sector is irrecoverable, reading that sector fails.
- Gabrys1 8mo agoFor this purpose, I think it would be nice to access the raw data, to see any errors that would be otherwise masked. As someone in the comments suggested, one might compare number of corrected errors in 1, 2, 5 years and compare to the number of redundant bits stored to estimate the expected longevity of the medium
- dehrmann 8mo agodvdisaster might already be able to do this analysis.