omv image for hc2 gives this error:

Err:7 http://ppa.launchpad.net/kyle1117/ppa/ubuntu cosmic InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3028C3C96AD57103
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3028C3C96AD57103
Reading package lists... Done
W: GPG error: http://ppa.launchpad.net/kyle1117/ppa/ubuntu cosmic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3028C3C96AD57103
E: The repository 'http://ppa.launchpad.net/kyle1117/ppa/ubuntu cosmic InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.

Solution:
#apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3028C3C96AD57103
Executing: /tmp/apt-key-gpghome.0MV2Z0m5hL/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 3028C3C96AD57103
gpg: key 3028C3C96AD57103: public key "Launchpad PPA for KYLE LEE" imported
gpg: Total number processed: 1
gpg:               imported: 1

no more error


----------------------------------------
install auto download for torrent
https://github.com/arakasi72/rtinst/tree/master#rtinst
------------------------

After moving interface, to get graphics going again:

rename files in
/var/lib/collectd/rrd/localhost/interface-eth0
edit
/usr/sbin/omv-mkgraph
and adjust ethernet interface name, eg: eth1 -> eth0

----------------------------------

<+subzero79> rm /var/lib/openmediavault/dirtymodules.json to get rid of the apply button

----------------------

Webgui not working ?

kill omv-engined (if running)


Look at output of :
omv-engined -df
------------------------------

tkaiser recommended SBC list September 16 2018

 USB in an 'controlled environment' isn't necessarily a bad thing. Take a look
at ODROID HC1 and HC2. Both networking and SATA is USB3 based but no
cable/contact hassles any more since the chips are on the PCB and with HC2 also
powering problems are gone (due to 12V powering).

 

The boards I personally consider for NAS and small server use cases are

 Olimex Lime2 (slow but the 'true UPS mode' is a big plus -- just add a battery and your whole server with connected 2.5" SATA disk runs for hours even if disconnected from mains)
 NanoPi NEO2 or Orange Pi Zero Plus are both fine if you don't need high performance and use the vendor's NAS add-ons (then you get no USB contact/cable hassles and powering also is no problem)
 ODROID HC1 or HC2
 EspressoBin (though still not totally convinced since at least my board shows an idle consumption that is IMO way too high)
 Clearfogs Base/Pro and Helios4
 RockPro64
 NanoPC-T4
 NanoPi M4 (especially if @mindee starts to evaluate a 'NAS HAT' allowing to power the board + 4 3.5" disks with a 12V PSU and there's a 4 port SATA PCIe controller on this thing)
 NanoPi NEO4 (more 'pocket server' than NAS of course)

==========================

OpenMediaVault now requires since version 2.0 that the public key needs
to be entered in RFC4716 SSH public key file format. So after we create
the key pair, we export the public key with:

ssh-keygen -e -f ~/.ssh/id_rsa.pub

we copy the output to the clipboard. 

---------------------------------

check drives list

sudo  omv-rpc "DiskMgmt" "enumerateDevices" "{}"