Hi, Gianmarco wrote: > -> I have tried with: 10.3, 11.1, 11.2 and 11.3. > [...] > -> my results (with DVD-1 debian version 11.2): > 1903144+0 record in > 1903144+0 record out > 3897638912 byte (3,9 GB) copied, 260,578 s, 15,0 MB/s > d1fc0ddc81d980b9eddc9d110344bcf17a6cbd5750e147112ccc23bef4d61a8a -
The DVD is readable at least as far it is needed for the BIOS to find the EL Torito boot record, the catalog, and the boot images. But the SHA256 does not match the one of https://cdimage.debian.org/mirror/cdimage/archive/11.2.0/amd64/iso-dvd/debian-11.2.0-amd64-DVD-1.iso Checking the DVD-1 of 10.3, 11.1, 11.3 would need other count= arguments for dd. They would have to be derived from their image sizes or from inspecting the DVDs. See below. > I just wanted to tell you that with a 2021-machine, of a friend of mine, > we tried to download the ISO file (DVD-1) from this 2021-machine, always > burn it in his 2021-machine (windows-OS) and we always tried to launch the > installation from the same machine. the result was for me unexpectedly the > same as all the other tests I performed. I still believe that the DVDs are somehow bad. Please inspect those which you still have by: xorriso -indev /dev/sr0 -toc -report_el_torito plain and report the resulting information lines. With the DVD+RW to which i burnt debian-11.2.0-amd64-DVD-1.iso i get: xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 80 nodes read in 1 seconds ... xorriso : UPDATE : 9791 nodes read in 8 seconds xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev '/dev/sr0' Media current: DVD+RW Media status : is written , is appendable Boot record : El Torito , MBR isohybrid cyl-align-on GPT APM Media summary: 1 session, 1903144 data blocks, 3717m data, 766m free Volume id : 'Debian 11.2.0 amd64 1' Drive current: -indev '/dev/sr0' Drive access : exclusive:unrestricted Drive type : vendor 'HL-DT-ST' product 'BDDVDRW GGC-H20L' revision '1.03' Drive id : '... nobody needs to know ...' Media current: DVD+RW Media product: MBIPG101/W04/48 , Moser Baer India Limited Media status : is written , is appendable Media blocks : 1903168 readable , 391936 writable , 2295104 overall Boot record : El Torito , MBR isohybrid cyl-align-on GPT APM Boot catalog : '/isolinux/boot.cat' Boot image : '/isolinux/isolinux.bin' , boot_info_table=on Boot image : '/boot/grub/efi.img' , platform_id=0xEF ISO offers : Rock_Ridge Joliet ISO loaded : Rock_Ridge TOC layout : Idx , sbsector , Size , Volume Id ISO session : 1 , 0 , 1903144s , Debian 11.2.0 amd64 1 Media summary: 1 session, 1903144 data blocks, 3717m data, 766m free Media nwa : 1903168s El Torito catalog : 5946 1 El Torito cat path : /isolinux/boot.cat El Torito images : N Pltf B Emul Ld_seg Hdpt Ldsiz LBA El Torito boot img : 1 BIOS y none 0x0000 0x00 4 7243 El Torito boot img : 2 UEFI y none 0x0000 0x00 5184 5947 El Torito img path : 1 /isolinux/isolinux.bin El Torito img opts : 1 boot-info-table isohybrid-suitable El Torito img path : 2 /boot/grub/efi.img The size to be used with dd's count= is given in the lines TOC layout : Idx , sbsector , Size , Volume Id ISO session : 1 , 0 , 1903144s , Debian 11.2.0 amd64 1 Media summary: 1 session, 1903144 data blocks, 3717m data, 766m free Other ISOs will show different numbers than 1903144. Older xorriso versions might omit some of the shown lines. But the assessment of node numbers (files and directories), of ISO session size, of volume id, and of El Torito boot images is supposed to be the same as in my above example. You will probably get other info in these lines: Media current: DVD+RW Media product: MBIPG101/W04/48 , Moser Baer India Limited It will be interesting to see what DVD type from which manufacturer you used. ----------------------------------------------------------------------- Sorry for my lack of more particular ideas about what goes wrong. The fact that the other subscribers to this mailing list are not offering own ideas might mean that they currently have none. To the bystanders: A test with an old BIOS machine and a Debian 11.3 DVD-1 would nevertheless be helpful. I can currently only test the EFI boot path. ----------------------------------------------------------------------- To get you going with Debian 11: Would a USB stick of at least 4 GB capacity be available for being completely overwritten ? If so, i propose (with the usual warnings not to overwrite your hard disk if it happens to be /dev/sdc): # Make a backup of the complete USB stick which i assume to be /dev/sdc usb_stick_dev=/dev/sdc usb_stick_backup="$HOME"/usb_stick_backup.gz dd if="$usb_stick_dev" bs=1M | gzip > "$usb_stick_backup" # Copy ISO image to the stick (i assume 11.3 here, because it is the # version that is currently advised for Debian installations) dd if=debian-11.3.0-amd64-DVD-1.iso of="$usb_stick_dev" bs=1M ; sync The last step is the risky one. Check twice whether /dev/sdc is correct or use a safer method like the one described in https://wiki.debian.org/XorrisoDdTarget#Identify_the_device_by_plugging_and_copy_if_it_looks_safe_enough Try to convince your machines' firmwares to boot from that USB stick. The ISOs contain a bootable MBR for BIOS and an EFI system partiton. So they should boot from the USB stick and lead to the same installer software as does the DVD. If you later want to get back your USB stick's old content and partitioning, perform this (again risky) dd run: # Restore backup usb_stick_dev=/dev/sdc usb_stick_backup="$HOME"/usb_stick_backup.gz gunzip < "$usb_stick_backup" | dd of="$usb_stick_dev" bs=1M Have a nice day :) Thomas