HP StoreEver ESL G3 Tape Libraries - Manual (Page 240)

reboot library
Description of Command Function
Reboots the library. The library will first complete any existing commands to minimize interruptions.
Command Syntax
reboot library
path: /reboot/library
Command Parameters (Required)
None.
Command Options
None.
Example
/>reboot library
Caution: Rebooting the library will terminate all backup operations.
and you will have to log on again to use the CLI.
Do you really want to reboot the library?
Enter 'y' to continue or 'n' to skip [default='n']: y
The library will be rebooted now.
You will have to log in again to the CLI.
240 CLI Guide