USB disk management
~~~~~~~~~~~~~~~~~~~

USB disks are used under certain circumstances by the StoredSafe
appliance, both at installation to export key material and when
upgrading firmware.

::

    ┌─────────────────────────────────────────────────────────────────────────────┐
    │                    USB on node1 (Version 2.x.x build xxxx)                  │
    └─────────────────────────────────────────────────────────────────────────────┘

    ┌─┬───────────────────────────────────────────────────────────────────────────┐
    │1│Show content of USB disk                                                   │
    │2│Show content of /isodevice/var/transfer                                    │
    │3│Copy content of /isodevice/var/transfer to a USB disk                      │
    │4│Remove content on /isodevice/var/transfer                                  │
    │5│Unmount any mounted USB disk                                               │
    └─┴───────────────────────────────────────────────────────────────────────────┘

    Remove content on /isodevice/var/transfer (Q to Quit)

    Main> System Settings> USB>

Show content of USB disk
########################

::

    Files on USB disk "/mnt/usb"

    StoredSafe-2.x.x-buildXYZZY.iso
    StoredSafe-2.x.x-buildXYZZY.iso.sign

    Press any key to continue

Show content of /var/root
#########################

::

    Files in "/var/root"

    90DB55393055099F.key
    Backup-SSH-Key-1.pub
    escrow.corp.com.sec.key

    Press any key to continue

Copy content of /var/root to a USB disk
#######################################

Under certain circumstances, such as a failure on an attached USB disk
at a critical moment, StoredSafe might copy the affected files to it's
failsafe mountpoint, which normally is "/var/root". If such an event
occurs, insert a new USB disk and select this option to copy the files
to the USB disk.

::

    Copy all files from "/var/root" to the USB disk mounted at /mnt/usb (<Y>/n)? y
    Copying "FD534875438.asc" to "/mnt/usb", copy complete.
    Copying "backup-sto.pub" to "/mnt/usb", copy complete.
    Copying "backup-mmo.pub" to "/mnt/usb", copy complete.

    Copied 3 files from "/var/root" to the USB disk mounted at /mnt/usb.

Unmount any mounted USB disk
############################

Use this option to forcefully unmount any mounted USB disk. If a disk is
mounted, the below dialogue will appear.

::

    Unmount USB? (<Y>/n) y
    Successfully unmounted "/dev/sdb2".

    Press any key to continue