Disaster after updating 6.4.2 to 6.7.4 help

So I connected to storage by SSH and saw that there is LUN share, that I can't delete it (always got error), but there are no files in this folder (no simple files and no configuration files).

I think updating from 6.4.2 to 6.7.4 has really big issues with iSCSI working and failing. In the internet I found some problems very near like me.

I want to thank you for your pleasure to help me on weekend.

But there is strange how you don't saw this luns, because directory with some configuration files is there.

In updating there was no warning that doing this update could do any bad affect to my system or files.

It looks like that there is a LUN, ant it is somhow LOCKED, but new updated system doesnt see it.

From first look to NETGEAR goods in server room few months ago it little bit scared me, because i'm often working with IBM, Lenovo, Dell hardware. But i thought it i'll be ok, try to work with it.

But after this incident sadly but I couldn't recommend this name for any computers specialist, and must to do hardware changes to more responsible hardware and software manufacturers, than NETGEAR.

It's very simple to say that user is responsible for it's data, but this is not simple CD, and updates are not just for fun, but firstly for security. So how oher time I could expect to do updates, hope for better security bug fixes and better storag stability and get my system down for good hopes?