Should destination partition be unmounted when using Pudd; doesn't work if it is so?  
From a flash drive on laptop I am booting Lucid-525.  I wanted to backup a bootable Linux live distro on a 2GB flash drive (, /dev/sdd1[vfat]) to the laptop's host drive-partition /dev/sda1. 

This would be my first time using Pudd so I was unaware that the destination partition, sda1. should not have been mounted.  It was mounted and was not shown on the list.  Clicking on probedisk unmounted the partition and all went well up to when I had to navigate to the destination directory.  I could go no deeper than /mnt/sda1.  I accepted that and entered the name pqi_SRCD for the image file.  The messagebox stated that it was saving pqi_SRCD.img.gz to /mnt/sda1 but the HD activity light on the host drive never blinked and at the end the image file was never saved though the program said it was successfully done.  Searches for pqi_* and *.img came up empty. 

On a second attempt, this time with sda1 unmounted, when I navigated to the destination /dev/sda1, pqi_srcd.img.gz showed in the Files pane but it is not in the directory (it isn't hidden).  I aborted.

I rebooted to remove any detrius and tried a third time.  

The listed partitions are unmounted.  Note /dev/sda1 was mounted so it is not shown here.  And the boot flash sdc1 which is mounted throughout a session is not shown either.  But is "A mounted partition should be unmounted before copying from/to it" correct?  I choose partition sdd1 then at the next screen selected Choose_file for the destination.

When I navigated to sda1, the Files panel was empty; the name used earlier was gone.  Once again I could go no deeper than the sda1 root.  (Afterall, I can't possibly access an unmounted partition, can I?)

My selection is /mnt/sda1.

Here is the screenshot of the last messagebox.

Destination is /mnt/sda1/pqi_srcd2.img.gz; /dev/sda1 is not included in the listed mounted partitions.  Earlier I was told that neither the source or destination partitions are to be mounted, now I am cautioned to make sure the mounted partition has sufficient space for the source. Well, I threw caution to the wind and mounted sda1 while the message was still on screen.  Voila, the compressed archive was saved to sda1.  Now I am really confused because it seemed to work with an unmounted source device and a mounted destination.

Can somebody try this and confirm the behaviour?  Which instruction needs to be changed and what should it state?

In the Choose_file screen, it states that if file is selected then it will be compressed.  IMHO, there is no need to repeat it in a subsequent screen.  Rather, it should only ask if the user wants to zero the unused areas of the image.

B. K. Johnson