Welcome to WordPress, Russell!

Russell Coker, SELinux developer, Bonnie++ maintainer and fellow LUV person has now switched from Blogger to his own WordPress installation, which makes leaving comments a hell of a lot easier! 🙂

He’s also now got a blog on “random things that are large or of limited interest“, though why that isn’t just a category on his main site (and using WordPress’s handy “more” marker to stop the whole thing showing up on the front page) I’m not sure.

Anyway, welcome to WordPress Russell!

RIP Kurt Vonnegut – 1922 to 2007

So it goes.. 🙁

American literary idol Kurt Vonnegut, best known for such classic novels as Slaughterhouse Five and Cat’s Cradle, has died on Tuesday in Manhattan at age 84, The New York Times has reported. Longtime family friend, Morgan Entrekin, who reported Vonnegut’s death, said the writer had suffered brain injuries as a result of a fall several weeks ago, the newspaper reported.

Minimum Memory for OpenSolaris ?

Dear Lazyweb,

Alec has been bugging me to try OpenSolaris with ZFS on something (a small laptop he suggested) but I’ve run into problems. My only spare box is an ancient Olivetti Netstrada, about 10 years old with 4 (yes, four) Pentium Pro 200MHz CPUs and a whopping (for its time) 256MB RAM.

Problem is that whilst Linux happily boots and runs on it the two OpenSolaris LiveCD’s I’ve tried (Nexenta and Belenix) both fail. Nexenta says that there’s not enough RAM to unpack the RAM disk (not surprising as their site says it needs 512MB to run) and the Belenix one just leaves the screen in a mess of pretty colours as soon as Grub tries to run the loaded kernel.

Solaris Kernel Crash on Olivetti Netstrada quad 200MHz PPro, 256MB RAM boat anchor

I then tried to boot the Nexenta install CD (they claim it can run in 256MB, though no mention of its installers needs) and got the same pretty pattern of colours when the kernel executed. 🙁

I do have one other PC, the only problem is that’s got even less RAM and the CD drive doesn’t appear to want to open any more, grrr..

How Big Was North Korea’s Bomb ?

My good friend Alec wrote on hearing about the DPRK nuclear test:

One presumes that there is a small chance it’ll have been staged with conventionals;

That got me thinking – how large a bomb was it ? We know the USGS detected a mag 4.2 shock so I went hunting around to see if there was an algorithm for converting magnitudes on the Richter Scale into energy, and, hopefully, into kilotons or megatons. It turns out J.C. Lahr wrote up a method for the “Comparison of earthquake energy to nuclear explosion energy” and helpfully included a piece of Fortran code to create a table of comparisons.

A quick “apt-get install gfortran” and a bit of mucking around with the code and I had an approximate answer:

Mag.   Energy      Energy      TNT         TNT         TNT         Hiroshima
       Joules      ft-lbs      tons        megatons   equiv. tons  bombs
4.2   0.126E+12   0.929E+11   0.301E+02   0.301E-04   0.201E+04   0.134E+00

So a magnitude 4.2 earthquake is (roughly) equivalent to a 2 kiloton device, less than one fifth of the size of Hiroshima bomb. This means it’s probably unlikely to have been a conventional device.

So what North Korea tested was fairly small in these days of megaton devices but certainly nothing you’d want to be anywhere near..