Check for your error in the list below:
Error in Amethyst upgrade - upgrade file was incomplete or corrupted
The upgrade file is not a valid upgrade. As described in the message, it may
have be incomplete or damaged. Get the file again and try the upgrade again.
mount: /dev/sdd1 is not a valid block device
The Amethyst server could not mount the USB drive.
Your USB drive might not be supported by the AMTLinux server. Please report the
make and model of your USB drive to Datatex.
This can also happen if a USB drive was in the server when it started.
You need to restart the server without a USB drive to fix this problem.
mount: /dev/sdc1 already mounted or /mnt/usb busy
mount: according to mtab, /dev/sdc1 is already mounted on /mnt/usb
The USB drive is already mounted. Please report this error. Restarting the
server should fix the problem.