[rolgiati]

Plagued with storage corruption linked to USB cable that do not make a good contact, I wrote the following to automate the checking of the "disk" when it got corrupted.
May require modifications for more recent Kindles, I would not know as I like the K3, and will not change ;-3)

   #!/bin/bash
    # Depends on dosfsck

    # This script runs dosfsck on the SD of a Kindle 3 
    # Keyboard after umounting it. 
    # May require adjusting for more recent Kindles. 
    # © Renaud Olgiati 2021 Feel free to copy or modify.
    # Use: connect a Kindle, and launch.

    #Check that the Kindle is connected
    rm -rf tototototo >/dev/null 2>&1
    # Find the device name of the Kindle, abort if none connected.
    df | grep Kindle | gawk  '{print $1}' > tototototo
    if [ ! -s tototototo ] ; then
    echo "No Kindle connected; connect, and re-launch."
    exit 1
    else
    # Check that the script is run as root, if not relaunch with su
      if [ $UID != 0 ]; then
    echo " "
    echo "fsckindle must be run as root."
    su -c "/home/ron/bin/fsckindle" 
    echo " "
    exit 1
      else
    echo "fsckindle now running as Root."
    echo " "
    SD=$(cat tototototo)
    fi
    # umount the Kindle prior to fsck
    umount /dev/$SD >/dev/null 2>&1

    # Run dosfsck 
    # -w will write changes to the disk immediately. 
    # -r will ask you about the repair method, if it has more than one way to fix an inconsistency. 
    # -l will list the names of files being checked; can be useful to determine if there are problems with any particular object. 
    # -a will automatically repair the filesystem. 
    # -v is the verbose mode, which should be helpful. 
    # -t will mark bad clusters, so they aren't used.

    dosfsck -w -r -l -a -v -t /dev/$SD
    echo " "
    echo "Done !"

    # Clean-up
    rm -rf tototototo >/dev/null 2>&1
    fi
    exit 1