4 ms·

Debian's CD images are actually hybrid CD/DVD/USB images: http://www.debian.org/releases/stable/i386/ch04s03.html.en http://www.debian.org/releases/stable/i386/

by dlitz 13y ago

Debian's CD images are actually hybrid CD/DVD/USB images: http://www.debian.org/releases/stable/i386/ch04s03.html.en http://www.debian.org/releases/stable/i386/ch04s03.html.en It's been a feature of isolinux for a while now: http://www.syslinux.org/wiki/index.php/Doc/isolinux#HYBRID_CD-ROM.2FHARD_DISK_MODE http://www.syslinux.org/wiki/index.php/Doc/isolinux#HYBRID_C...

keithpeter 13y ago
When trying to transfer an ISO to a USB stick, I find dd if=<file> of=<device> bs=4M; sync as per Debian wiki [1] works for me with Debian isos and recently a CentOS live CD image when installing on another laptop. Oddly enough, USB sticks prepared using unetbootin fail with Debian ISOs (boots but continually complains about not being able to find CD-ROM) but also works with CentOS based ISOs. [1] http://www.debian.org/CD/faq/#write-usb http://www.debian.org/CD/faq/#write-usb
pippy 13y ago
Every single Debian USB image I've tried to flash with dd has failed in the last few years. I have to boot up a windows virtual machine and use LinuxLive USB Creator to create one. It's odd as the RaspberryPi debian image works perfectly fine.
- a-l-c-o 13y ago
  Strange.. I do it without problem at every install.
  - pippy 13y ago
    I'd love to see a cross browser app, one that worked on Mac OS X, Windows, and Linux that just required to to drag and drop an image and write to USB.
- lukeschlather 13y ago
  Ubuntu's usb-creator-gtk works fine for me. I do agree it's disappointing you can't just dd it.
- dlitz 13y ago
  That's odd. It should be fine, but here are some things to check: - Make sure that none of the filesystems on the USB stick are mounted before you begin. Otherwise, the filesystem drivers might corrupt something. - Use a larger block size that's a power of 2 (e.g. bs=4096k). The default is 512 bytes, which is too small. This should just speed things up, but using writes that are smaller than the actual flash erase blocks can cause a lot of extra erases, and maybe your flash stick breaks when you do that. - Run 'sync' after using dd, and wait for disk activity to finish. dd doesn't flush to disk by default. - Don't use an amd64 image on a 32-bit machine. Don't use ia64 on a 64-bit PC. - Try using synchronized I/O: sudo dd if=debian-7.2.0-i386-CD-1.iso of=/dev/sdx bs=4096k oflag=sync
  - pippy 13y ago
    Thanks, I'll come back and read this next time I do it. The first thing I checked was the bit length, though it could be the file system type or the synchronized io

by dlitz 13y ago

keithpeter 13y ago

When trying to transfer an ISO to a USB stick, I find dd if=<file> of=<device> bs=4M; sync as per Debian wiki [1] works for me with Debian isos and recently a CentOS live CD image when installing on another laptop. Oddly enough, USB sticks prepared using unetbootin fail with Debian ISOs (boots but continually complains about not being able to find CD-ROM) but also works with CentOS based ISOs. [1] http://www.debian.org/CD/faq/#write-usb http://www.debian.org/CD/faq/#write-usb

pippy 13y ago

Every single Debian USB image I've tried to flash with dd has failed in the last few years. I have to boot up a windows virtual machine and use LinuxLive USB Creator to create one. It's odd as the RaspberryPi debian image works perfectly fine.

a-l-c-o 13y ago
Strange.. I do it without problem at every install.
- pippy 13y ago
  I'd love to see a cross browser app, one that worked on Mac OS X, Windows, and Linux that just required to to drag and drop an image and write to USB.
lukeschlather 13y ago
Ubuntu's usb-creator-gtk works fine for me. I do agree it's disappointing you can't just dd it.
dlitz 13y ago
That's odd. It should be fine, but here are some things to check: - Make sure that none of the filesystems on the USB stick are mounted before you begin. Otherwise, the filesystem drivers might corrupt something. - Use a larger block size that's a power of 2 (e.g. bs=4096k). The default is 512 bytes, which is too small. This should just speed things up, but using writes that are smaller than the actual flash erase blocks can cause a lot of extra erases, and maybe your flash stick breaks when you do that. - Run 'sync' after using dd, and wait for disk activity to finish. dd doesn't flush to disk by default. - Don't use an amd64 image on a 32-bit machine. Don't use ia64 on a 64-bit PC. - Try using synchronized I/O: sudo dd if=debian-7.2.0-i386-CD-1.iso of=/dev/sdx bs=4096k oflag=sync
- pippy 13y ago
  Thanks, I'll come back and read this next time I do it. The first thing I checked was the bit length, though it could be the file system type or the synchronized io