Although I think more voting (up and down) would be a good thing, I don't think it should be done to make SF "warmer" and more welcoming.
I think one reason for low voting is that professional sysadmins usually don't have time and money to do everything, so we prioritize quickly and harshly. When people see a question that's not bad enough to downvote, but not clear or complete enough to answer, they probably move on or maybe leave a comment asking for more information.
This makes the bar for "good" questions quite high: questions have to be on-topic, and they have to be clearly expressed and have something interesting about them to get someone to upvote. More obscure topics (like Notes Looking at some of your questions, also HP-UX or VMS)I think there are going to get less interest.two main reasons they might not be getting upvotes:
More obscure topics (like Notes, also HP-UX or VMS) are going to get less interest. Your question about disconnecting users from files on your NAS box might fall into that category.
I'm not sure how to express this, but there's something about your questions that makes them seem unclear to me. There's lots of information in them (in one case I think the question is simply too long), but for me, at least, it's hard to figure out exactly what's being asked, what you've tried, what supporting information you have. I can see most of that information is in the question, but it doesn't jump out at me.