Hi, pe...@easthope.ca wrote: > > xorriso -for_backup -dev /dev/sr0 \ > > Finding a file as it existed months or years ago can be tedious
I wrote: > > You could give the backups volume ids which tell the date. pe...@easthope.ca wrote: > Thanks. I should have added that when you mentioned a few > years ago. I am working on a solution for your non-unique volume id situation by optionally referring to modification timestamps. A new command -toc_info_type can switch -toc away from showing volume ids: $ xorriso -indev /dev/sr0 -toc_info_type mtime -toc xorriso 1.5.7 : RockRidge filesystem manipulator, libburnia project. ... Media current: DVD+RW ... Volume id : 'HOME_Z_2024_06_27_225526' ... TOC layout : Idx , sbsector , Size , Modification Time ISO session : 1 , 32 , 1240808s , 2024.06.20.232334 ISO session : 2 , 1240864 , 29797s , 2024.06.21.220651 ISO session : 3 , 1270688 , 20484s , 2024.06.23.225019 ISO session : 4 , 1291200 , 28928s , 2024.06.24.224429 ISO session : 5 , 1320128 , 21352s , 2024.06.25.223943 ISO session : 6 , 1341504 , 30352s , 2024.06.26.223934 ISO session : 7 , 1371872 , 29023s , 2024.06.27.225617 Media summary: 7 sessions, 1400744 data blocks, 2736m data, 1746m free This is a zisofs compressed backup which happens every evening except saturdays. Note the time difference between 2024_06_27_225526 and 2024.06.27.225617. These 51 seconds where spent between program start and begin of writing. This program enhancement is already committed to git. In a few days there will be a new GNU xorriso 1.5.7 tarball, which is easy to build and to test without any danger of frankendebianing. I'll give you a note. Currently i am working on a mount gesture which shall automate the task of picking the youngest backup before a given time point: -mount /dev/sr0 not_after 2024.06.22.120000 /mnt/iso I think "not_after" is a concise way to say "younger_or_exactly_that_age". Up to the next release i could take better proposals. :)) (I am having my fun with time zones. The ISO 9660 timestamps can have a time zone from their maker and the computer running xorriso has a local time zone. Argh ...) > > -assert_volid 'BOB_*' fatal > Prevents me from appending to a DVD from another backup system. But I > need to add it when beginning a blank DVD. You may use it also on a DVD which already has sessions with non-unique ids. This needs two editing operations in your script. Begin by adding the volume id command to the backup-of-backup run: -volid BOB_"$(date '+%Y_%m_%d_%H%M%S')" Then do an add-on backup to the DVD with the boring ids. After this session add the check command: -assert_volid 'BOB_*' fatal In the further backup runs, the DVD is supposed to pass this check. Have a nice day :) Thomas
