you must use mount command from telnet
then if you run the command
if you lose the mounts after reboot
you must add these in file /etc/fstab
it's very strange that the image is not booting from usb
if you have a nullmodem serial cable you can see whats wrong
using putty & serial connection while booting
mount /dev/sda1 /mnt/hdd
mount /dev/sda2 /mnt/usb
then if you run the command
you can see the mounts & if you mounted the correct partition for hdd or usbdf -h
if you lose the mounts after reboot
you must add these in file /etc/fstab
/dev/sda1 /mnt/hdd auto
/dev/sda2 /mnt/usb auto
it's very strange that the image is not booting from usb
if you have a nullmodem serial cable you can see whats wrong
using putty & serial connection while booting