Missing disks once the machine has booted

Normally all the disks are mounted during boot time.

If something goes wrong you can manually mount the disks if nothing else is pausing a problem.

The simplest steps are :

1. turn a terminal by using the key combination CTRL+ALT+F1 (no graphics mode) to go back to gaphics mode use CTRL+ALT+F7 or sometimes F8
2. login in as admin
3. once logged in enter sudo -s
4. then either mount your missing disk with : mount /syno for example. Give simply the name of the linux mount point (check the file /etc/fstab)
5. to be sure you can also mount also the disk by : mount -a. All définition in the /etc/fstab are mounted