bug#34487: dd (coreutils) 8.30 – A written ISO image cannot not be booted from BIOS
tags 34487 notabug close 34487 stop Hello, On 2019-02-15 5:02 a.m., Ricky Tigg wrote: Hi. An ISO image cannot not be booted from BIOS [...] # dd if=debian-9.7.0-amd64-DVD-3.iso of=/dev/sdc A CD/DVD image is not the same as a hard drive. The internal structure differs, and one can not be copied to the other and expected to work. Since this is not a bug in dd, I'm closing this item. For general help regarding operating system installation, please contact the relevant operating system's mailing list. In this case, likely Debian-user mailing list: https://lists.debian.org/debian-user/ See also https://wiki.debian.org/DebianMailingLists . regards, -assaf
bug#34487: dd (coreutils) 8.30 – A written ISO image cannot not be booted from BIOS
Hi. An ISO image cannot not be booted from BIOS Initial device state: # parted /dev/sdc unit s print free Model: (...) (scsi) Disk /dev/sdc: 15638480s Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End SizeType File system Flags 2s15638479s 15638478s Free Space Then commands executed were (Note: a non-live ISO image is involved): # dd if=debian-9.7.0-amd64-DVD-3.iso of=/dev/sdc bs=4M oflag=direct && sync $ df -hT | tail -n1 /dev/sdciso9660 4.4G 4.4G 0 100% /run/media/yk/Debian 9.7.0 amd64 3 # parted /dev/sdc unit s print free Error: /dev/sdc: unrecognised disk label Model: (...) (scsi) Disk /dev/sdc: 15638480s Sector size (logical/physical): 512B/512B Partition Table: unknown Disk Flags: That dd command was also executed without option/parameter 'oflag=direct'. but final result remained identical. I could notice that *dd* erased existent *partition table* and didn't add flag *boot.* Once at last the system was rebooted, then proper device selected from BIOS , the following message was produced: > *Reboot and select proper boot device or insert boot media in selected > boot device and press a key.* >
