Dear list, Today I was given a box of DVDs with the movies, conventional DVD video (mpeg2/ac3) mostly. Back in the old days one could make an ISO9660/UDF image of a DVD with a simple "cat /dev/sr0 > file". To my biggest surprise, I does not work for me anymore. But I tried this approach last time back then stretch was stable.
Specifically, "cat", "ddrescue", and "safecopy" happly read about 1.2G of any DVD I fed'em with (about several tens), *without* any errors, *without* anything unusual in dmesg. The only problem was - your typical DVD Video holds 4.7G data, so such "backups" (so to say) were truncated. I seem to be able to overcome the issue with (the thing rocks!): xorriso abort_on NEVER -indev /dev/sr0 -check_media \ time_limit=1800 report=blocks_files data_to=my.iso because xorriso somehow read the DVD contents in full. The question is - what did xorriso done differently? Is it a kernel bug, as it seems that the kernel determined DVD block device size incorrectly? Reco