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Re: Trouble making bootable USB from ISO image




On Sat, May 04, 2019 at 11:39:39AM +0900, Mark Fletcher wrote:

In Jessie and Stretch, gnome-disk-utility-3.22.1 (which labels itself
"Disks") sometimes balks at the instructions I give it.  But that is
what happens when you use a GUI instead of the command line, and
particularly when the utility utilizes ambiguous symbols rather than
clear English words.  Not everyone assigns the same meaning to a
particular symbol.

Nonetheless, I do find "Disks" handy to identity the device associated
with a USB memory stick just plugged in, and to indicate at a glance
the partitioning and formatting.

According to "https://www.debian.org/CD/faq/#write-usb";, all Debian
i386 and amd64 images are created using the isohybrid technology, so
that they may be copied to USB flash drives which boot directly from
the BIOS or EFI firmware of most PCs.  In Linux, copy with "cp <file>
<device>" or with "dd if=<file> of=<device> bs=4M; sync".  And be sure
you are copying to the device (such as "/dev/sdd") and not to a
partition of the device (such as "/dev/sdd1").

In the case of a USB flash drive which refuses to boot, you might try
using "fdisk" to delete all existing partitions and create a new
partition, followed by "mkfs.msdos" before you copy the ISO image to
the drive.

If everything else fails, before you toss the drive into the dumpster,
plug the drive into a Window$ box and allow Window$ to format the
drive.  Now and then a Window$ box can do something useful.