On Mon, Dec 02, 2013 at 14:11:13 +0100, Florian Weimer <fweimer@xxxxxxxxxx> wrote:
What's the correct way to write an image to a USB stick? I don't write to it while any file systems are mounted. Mounting happens automatically when I plug in the stick, and if I click "Eject" in the GNOME notification, the /dev/sdb block device assigned to the stick is still present, but dead—the open system call fails with ENOMEDIUM.
I usually do things at the shell. You should be able to use umount to unmount the device and then you can safely overwrite the device using /dev/sdb.
You can use dd to copy over images. (If you do this you probably won't be able to write other stuff to the file system, depending on the image. If you want to do that there are tools for doing that.) You probably want to use a block size larger than the default. (I am not sure if the writes end up being combined at a lower level, but if not, writing USB devices 512 bytes at a time is very inefficient because of the erase block size in these devices is typically in the 128KiB range.)
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