Gparted Start scans whole system, even i want format usb device

GParted already supports scanning only the devices you pass to it. This is most easily done from a terminal window.

For example if you wish to scan only /dev/sdf, you can use the following:

sudo gparted /dev/sdf

See the GParted Manual [1] for more information.

[1] http://gparted.org/display-doc.php?name=help-manual#gparted-run-from-cmd-line

Then it's sad, that there is no GUI-Option.
Or, when i start it from a terminal window, there is no --help argument, or no help screen, if i use an command which doesn't exist.

Good point about the lack of a "--help" argument from the command line.

There is a man page....

As for the scan on startup, that is a design decision dating back to the initial development of GParted.

Is it possible to add a gui, which let me choose, which device i want to scan (maybe all), if there are more than one storages to the pc are attached, if i use no argument in the terminal?

You might create an icon on the desktop or in the menu system with the command line parameters that you desire to only access a USB drive when it is plugged in.

For example if you have two internal hard disk drives (/dev/sda and /dev/sdb), then a newly inserted USB drive should receive device path /dev/sdc. In this case modify the icon parameters to pass /dev/sdc to gparted.

Hi Curtis... what exactly is it scanning for again, and why does it need to do that on any drive other than the one that is currently selected?

@Phillip, scanning is performed to determine which devices are present, what partition tables these contain, what file systems are in the partitions, and other details such as volume labels, free space, UUID, etc.

And this scanning happens again on every device, even if i modify only one partition on one device?

Which devices are present should be as simple as looking what files are in /dev... reading the partition tables and identifying filesystems though... why does gparted care unless and until you have chosen to show that drive?

Yeahr, it should first only list the devices and then, the choosen one (or directly at the start the first one) should be scanned.

Scanning for all devices on startup is a design decision dating back to the initial development of GParted.

A work-around to scanning only the devices required is to pass these on the commmand line to gparted.

You are free to submit a patch upstream [1] to alter this behaviour.

[1] http://gparted.org