Debian Squeeze: LVM / udev etc. buggy?

This is very unfortunate. Now that this complex server setup is finally ready, LVM starts to throw bugs. Setup is a volume group on a software RAID volume. I can create a snapshot of my Xen-DomU-Volumes, backup them, but as soon as I try to remove the snapshot with lvremove, the command just hangs, and so do all other LVM-commands, even lvs.


I’ve googled around a lot now, but with no results. Consequently, I can not backup my stuff at the moment.

Following a proposal to stop the udev deamon before lvremove, I didn’t get any further either, because this seems to break Xens ethernet bridges somehow (although this is really, really weird, it just shouldn’t!), while being helpful for the Backups. No solution.

And, all similar behavior I find googling relates to Kernel <2.6.16 and LVM2 <2.02. What the Fuck! 2006, 2007…

Anybody out there with the same problem? Or someone with an idea or solution? Anybody desiring more information? please report to me!

I hereby bid US-$60.00 for:


  • a working fix proposed
  • the right information to develop a fix myself


So, if somebody can tell me, what’s going on here between LVM, udev and dm – don’t hesitate to use my contact form. Should your information result in a fix, you get $60. Should two individuals provide equivalent information, the first one wins.

EDIT/UPDATE Jan 2, 2012:

Problem tracked down to potential hardware issue! see comment below! And so far, Debians reputation fixed on approbation! 😉


the Long March

After more than half a year of experimentation, all components of my future network topology look fairly stable. The only thing holding my back from final migration is a sudden crash of backup drive. Without that thing, it’s too risky for now, so I have to wait a couple of days until the replacement is there. I was lucky to find a relatively moderate priced one these days. Instead of a modem I’m now using a hacked Telekom Speedport W701V – I’ve turned it into a “Fritz!box” to be exact, by installing a modified firmware. Continue reading the Long March

what is 18,446,744,073,709,551,616?

Answer,  US version:

18 quintillion 446 quadrillion 744 trillions 73 billions 709 millions 551 thousands 616. It’s the number of IPv6 addresses my provider has just dropped in front of my feet. I think I can launch an SSL secured website for every individual atom in the universe now. Or, it’s the number of now possible IPv4 addresses squared.

This does not necessarily mean that I like IPv6. Far from it! I’m expecting the transition to be very painful. A subtle but broad security crisis driven by the introduction of a great number of poorly understood conceptions and new devices might lead to severe acceptance problems of IPv6 or even the Internet as a whole. And people will still insist on IPv4 addresses anyway, because that ensures broader coverage. The IPv4 crisis will not be solved by IPv6, at least not in the near future.

Live!Zilla, SFC and WordPress

It has indeed turned out that SFC is better as it seemed that day. Maybe Facebook needed their time to update all of their resources, furthermore I’ve observed even more Problems on the FB website at the same time.

Another really funny tool is Live!Zilla. It is sort of chat system for website operators. Apart from the PHP/mySQL based server component, a local client has to be installed on the operators PC. Unfortunately there is only a Windows implementation available. Macs and Linux are not covered.

Having this installed as a website owner, your site visitors can see whether you’re online or not, and if so, initiate a chat conversation. The other direction is possible as well. In the aforementioned Windows Client, you get a list of  current visitors of your web site, and you get detailed information which pages they request, and you can actively invite them to chat with you. I’ve seen some corporations do that already. Don’t remember, was it Microsoft? Or Dell? Never mind, that scale at least.

I’d not be surprised, if there are people who have privacy concerns here.

Facebook Connect

After installing SFC for WordPress, this looks all weird to me. Interoperation is not at all as straightforward as I thought. Right now, things look buggy and users end up in unnecessary dead ends. So, is there any consistent use case for all that stuff? If I login with Facebook over here without having a connected account, that creates nothing but a stupid error message, instead of giving me the choice to connect to local account (by supplying credentials) or instead sign up as a new user. And even if everything seems fitting, I’ve still observed failures, and wonder if they have to do with the given SSL setup.

But maybe I only have to investigate into this. But as I’ve seen so many failures by now, there is some doubt piling up in my brain that has to be addressed here.


I’m very glad to have a new blog again after having shut down last December due to legal incertainities. As the sun shines again, I decided to start with some photographic and visual media stuff. My interims solution on will be kept up, but turned into a German language stream of irrelevant words.


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new text now! integrated new words and punctuation marks!