I wish I did more rigorous work on this but I managed a large Rewritable DVD backup for a satellite instrument with over 3000 DVDs stored in a filing cabinet for almost ten years. When I joined about three years in I added checksums to the backups and infrequently sampled and reburned older discs and found zero corruption after almost a decade stored in those conditions. Given there was a mix of R and RW burned discs I was actually pretty surprised there was no corruption because I had it ingrained in my mind these things shouldn’t last so long.
