Can't you use `dd if=/dev/zero of=/dev/sdX count=100` to wipe out MBR and
partition table? Then gparted will just see a new drive. Note sdX = sdb,
sdc or whatever your flash drive is.

On Fri, Jan 27, 2017 at 4:55 AM, EoflaOE <email address hidden> wrote:

> I did it on Ubuntu Server ISO using usb-creator-gtk, using my general
> USB flash drive and its size is 8GB, and it did the same thing so I
> deleted the culprit partition using Gparted, and no errors like that is
> displayed and it removed the partition completely, then, I was able to
> create the FAT32 partition. From now on, I have to use Rufus, the
> perfect tool on Windows.
>
> usb-creator-gtk tried to set the flash drive's partition into ISO 9660,
> which means it is not recognized by some systems, and is read only. I
> removed the partition completely that is ISO 9660, then I formatted it
> on FAT32 (partition size is 7.6GB after ISO 9660 removal).
>
> So I suggest everyone who wants to create a Ubuntu flash drive must use
> Rufus, or Universal USB Creator, until this bug is fixed to avoid damage
> to your USB flash drive's partition.
>
> Some users (like me) have this bug but they are able to remove the
> culprit, iso9660 partition and recreating the FAT32, useful, read and
> write partition. Others have this bug but they are not be able to remove
> the culprit, iso9660 partition and shows that error.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1589028
>
> Title:
>   Improper blocksize set by usb-creator, leads to problems during
>   formatting
>
> Status in parted package in Ubuntu:
>   Confirmed
> Status in parted package in Debian:
>   Fix Released
>
> Bug description:
>   When ever I create a bootable USB using usb-creator , and when I try
>   to format it after my work is done, I get this error
>
>   “The Driver descriptor says physical block size is 2048 bytes, but
>   Linux says it is 512” in Gparted. (screen shot in the attachments)
>
>   Furthermore , The USB is divided into strange partitions (image
>   attached). and shows the 16GB partition as 60GB partition.
>
>   I presume that this is because of setting the blocksize to 1000000 by
>   this tool : as in the source code here : https://bazaar.launchpad.net
>   /~usb-creator-hackers/usb-creator/trunk/view/474/bin/usb-creator-
>   helper#L111
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 16.04
>   Package: usb-creator-gtk 0.3.2
>   ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
>   Uname: Linux 4.4.0-22-generic x86_64
>   NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
>   ApportVersion: 2.20.1-0ubuntu2.1
>   Architecture: amd64
>   CurrentDesktop: Unity
>   Date: Sat Jun  4 08:53:43 2016
>   InstallationDate: Installed on 2016-05-30 (4 days ago)
>   InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
> (20160420.1)
>   SourcePackage: usb-creator
>   UpgradeStatus: No upgrade log present (probably fresh install)
>   UsbCreatorLog:
>    usb-creator 2016-06-04 08:53:29,852 (DEBUG) backend.py:24:
> UDisks2Backend
>    usb-creator 2016-06-04 08:53:30,152 (DEBUG) backend.py:64:
> detect_devices
>    usb-creator 2016-06-04 08:53:30,157 (DEBUG) backend.py:104: drive
> added: /org/freedesktop/UDisks2/block_devices/sr0
>    usb-creator 2016-06-04 08:53:30,157 (DEBUG) backend.py:118: not adding
> device: 0 byte disk.
>    usb-creator 2016-06-04 08:53:32,702 (DEBUG) backend.py:181:
> cancel_install
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/parted/+bug/
> 1589028/+subscriptions
>