Anyone know what exact tape they are talking about? When I google 15TB tape I only find a LTO-7 which is 6TB native, and 15TB compressed. Assuming a compression a compression ratio of 2.5 to 1 seems pretty crazy to me.
To be honest I never really understood the main reason for adding compression, especially since you can compress individual files far better using existing algorithms and then write those to tape. It must be a marketing thing.
The 10TB tape I found was "IBM 3592 JD Advanced Data Tape Cartridge 10TB/30TB (2727263)"
https://spectralogic.com/features/ts1155-technology-tape-dri...