Creating bootable USB corrupts the key

I have a 16GB USB dongle, classic. Using other tools to load a ubuntu image onto it creates a 16GB partition with about 1.5GB used, and it’s called “Ubuntu <version><arch>” or similar.

Here, it “seems” to do the same, but it doesn’t:

• lsblk -l:

  sdd    8:48   1  14,6G  0 disk 
  sdd1   8:49   1   1,1G  0 part /media/vankasteelj/Ubuntu 15.10 amd64
  sdd2   8:50   1   2,2M  0 part 

• gparted:

(keep in mind it’s a 16GB key, not 64 like etcher seemed to write it.)

• libparted log:

Driver descriptor indicates a physical bloc size of 2048 bytes, but Linux says 512 bytes.

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somehow, that key does boot x)

[vankasteelj]

“safe to ignore”, you’ll have to say that quick, it does mess up the partition table and render the usb key “broken” for people not knowing how to fix it 😕

[magicvince]

Same problem using etcher on Debian Stretch with Debian’s ISO (original or remastered Debian Stretch, LMDE3, Primtux …) on different usb stick (brand and space). It works to copy and boot the image but if you want to use gparted for partitioning the HD, “Driver descriptor indicates a physical bloc size of 2048 bytes, but Linux says 512 bytes.”. It is impossible to make any operation on the stick (copy or delete a file for exemple) It was also impossible to reuse the stick if I don’t use the sudo dd if=/dev/zero of=/dev/sdX bs=512 count=1 et build a new ms-dos table of partition (like it was describe in documentation)