[JJTech]

Hi! Today I found myself in a situation where I wanted to be able to use my Kindle normally, but still have a script be able to push content to the Kindle without user interaction.

The Kindle can be used while plugged into the PC by ejecting it, but I couldn't figure out how to "un-eject" it without unplugging it.

Eventually, I figured it out, and I decided to post it for anyone interested.

Windows:

Spoiler:

1. Download sg3_utils. There are regular builds for Windows, but I have provided a stripped-down version with only the features you need on GitHub. I have also attached it to this post.
2. Open an Administrator Command Prompt to the folder you extracted sg3_utils to.
3. Find the device name of the Kindle:

   .\sg_scan.exe

   , noting down the number (e.g. PD2) next to the line that says "Kindle".
4. To "eject" the Kindle (note that this is NOT the same as ejecting in Explorer, you can't un-eject with that) execute the command:

   .\sg_start.exe --eject PD2

5. To "un-eject" the kindle execute the command:

   .\sg_start.exe --load PD2

   Note that you can ignore any "device not ready" errors.

Linux:

Spoiler:

Just use

eject /dev/sda

to eject, and

eject -t /dev/sda

to "un-eject", replacing /dev/sda with your Kindle's device.

You're done! I might script this process later, and it could be incorporated into other applications. I also have no idea how this might be accomplished on macOS.