Package: debian-cd Severity: wishlist Dear Maintainer,
== Introduction == In Debconf 14 Debian installer and CD BoF talk which it's archived here: http ://meetings-archive.debian.net/pub/debian- meetings/2014/debconf14/webm/Debian_installer_and_CD_BoF.webm someone in the public suggested to concatenate 1 GB size images (Skip to time: 28:58 in the video ) so that you can use them in 4 GB usbs. This will also mean that you won't have to maintain 1 GB, 2 GB, 4 GB and 8 GB size installer images but only: 1 GB, 1 GB, 1 GB and 1 GB with most no repeated packages. So you would only need to do something like: cat debian-7.6.0-i386-USB-1.iso debian-7.6.0-i386-USB-2.iso debian-7.6.0-i386-USB-3.iso debian-7.6.0-i386-USB-4.iso > /dev/sdc where sdc is your hard disk device. Steve McIntyre replied that was not possible because filesystems don't work that way. Another reply from the same person that initially suggested the idea was: "But we can fix it". Finally Steve turned down the idea. == Overview == After thinking about it, although I'm not sure 100%, I think it could work. The idea is, as you know, how big your initial image size you can mount the next image. How would be do that ? Just by offsetting the mount of the partition. Just as qemu does: https://wiki.archlinux.org/index.php/QEMU#Mounting_a_partition_inside_a_raw_disk_image So the suggested: mount -o loop,offset=32256 disk_image mountpoint would have to be rewritten as: mount -t auto -o offset=966367673856 /dev/sdc /mnt/apt-2 where the offset is based on an hypotetical 900 MB image as is: (900*1024*1024*1024)+32256 . == Possible problem == The only doubt I have is that when you initially dd the first 1 GB image you are defining a 1 GB partition table. So I'm not sure if this 1 GB partition table will disable the kernel to read data on usb hard drive beyond the 1 GB limit or not. I will try to make some tests in the next days to prove if the minimal functionality needed actually works or if it would need hacks on how Gnu/Linux kernel reads devices bigger than its partition table suggested size. == Implementation idea == (Loop till you do not find a new valid dd'ed hard disk partition) :Try to mount the next dd'ed hard disk first partition in the disk. Add the packages directory found on that partition to /etc/apt/sources.list (or whatever you use in Debian Installer). Run apt-get update to add these packages to the available ones. == Similar bugs == This is a very similar bug to: #617853 . The only difference is that in my implementation the debian-installer sorts out the next images while in the other bug I suppose the tool is meant to read inside the image, extract its contents and copy the packages in the usb. Feel free to relate both bugs if it's worth. Actually Steve McIntyre describes this bug in his talk. -- System Information: Debian Release: jessie/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.13-1-amd64 (SMP w/4 CPU cores) Locale: LANG=es_ES.UTF-8, LC_CTYPE=es_ES.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
