I am trying to format sd card in which I first installed noobs(raspberry pi). It created its own partition tables and now I want to use the sd card for some other purpose.

I have tried the following:

1) Tried the direct format command, but it said input/output error

2) Tried sdcardformatter on windows

3) Tried gparted.

4) Used the fdisk command

After all these trials without any success, now I am trying to use the dd command. The screen shot is as follows:Screenshot of my terminal

Its been 3 hours since I have started the command. Even the amount of data processed is around 40.2M since 2 hours.

I am using 8GB machine with Intel i7 processor, ubuntu 16.04. The sd card is class 10 32GB micro SD card. It doesn't have any lock!

Any help would be appreciated. Thanks

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1 Answer

I suggest that you use mkusb for this purpose. It wraps security around dd, and helps you get things right. There are menu options to wipe the first megabyte (which is often enough), or the whole device (which is slow, but might improve the write speed), or restore the drive to a standard storage device (automatically).

If mkusb fails (and you have checked that the 'lock microswitch' is not 'on', and no other process is locking the device) the drive is probably 'gridlocked', which is the first stage in the failing process. The next stage is that the drive is completely dead.

To be sure, it is a good idea to reboot the computer to get things clean and nice (and kill processes that might disturb what you want to do). You should also disconnect all other USB devices and memory cards (if possible). Then try again.

See the following links,

Pendrive lifetime

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