madness.at

The Good, the Bad ...

Wed, 19 Aug 2009 00:58:26 +0100

... and Sony Playstation 3 Slim. Boy is it ugly or what?

On the bright side, it's got a 120 GB hard drive, it's 32% smaller, 36% lighter and has 34% less power consumption. It's cheaper too. However, apart from all that .. it still looks ugly.

Update: Real-World Power Consumption for Sony Playstation 3 Slim looks as follows: Standby - 0.5W, XMB Menu / Idle 75W, Playing MP3 85W, Playing Video (1080p), Playing F1 2007 (Demo) 80-110W

Green IT: Oh, really?

Tue, 05 May 2009 23:27:01 +0100

Since everyone is talking about Green IT and saving power and stuff, I thought I'll have to do some research of my own. Therefore I got myself a Conrad Energy Logger 3500. A nice little tool, that allows you to keep an eye on your electrical expenses. Besides measuring Power, Current, Voltage, Line Frequency and Power Factor, it also allows you to do some longterm measurements, storing all the data on standard SD cards. Really handy.

Anyway, here are now some early observations. First, the standard desktop gear (mostly old systems with onboard graphics):

	Standby (W)	Idle (W)	Load (W)
Asus M2NPV-VM, A64 X2 3800+ CnQ, 4GB, 2x1TB WD Green	6	55	120
Asus CUV4X-DLS, Dual P3 933, 2GB, 7x160GB	5	99	145
Foxconn 6150K8MD, A64 3000+ w/ CnQ, 2GB, 2x250GB	6	63	85

in contrast to this, some "power-optimized" equipment:

	Idle (W)	Load (W)
Cobalt RaQ4, K6-2/500, 256MB, 2x40GB	24	40
Cobalt RaQ3, K6/350, 128MB, 1x30GB	19	31
PC Engines WRAP-2E, Geode 266, 128MB, Hifn 7955	4.7	5.2
PC Engines ALIX2C2, Geode LX800, 256MB, Winstron CM9	6.9	8.8
Thomson Speedtouch ST 546 v6 (DSL Modem)	8	n/a

Its really amazing how energy efficient those little PC Engines boxes are! Ideally suited for firewalling, VPN connections and WLAN access. However, also rather interesting, the rather low power consumption of those old Cobalt RaQs; no wonder they were once very common in datacenter environments.

Just for the fun of it .. I also did some measurements on my Playstation 3 ...


Playstation 3, 80GB (now w/ 250GB) -> Power Off / Standby			<2W
Showing MainMenu (Idle)			122W
Running Folding@Home (Playstation Life)			125W
Running MP3 Player (Space Thingy)			125W
Running MP3 Player (Color Thingy)			132W
Playing Oblivion - The Elder Scrolls IV			132W

Standby power consumption is fine, but idle power consumption is definately NOT! also 132W might be acceptable for playing games, 125W playing MP3s is NOT! ... *hmpf* ... bad Sony! ... Guess I should look for a new MP3 player ... ;-(

Links 2009-02-12

Thu, 12 Feb 2009 23:58:45 +0100

Merry Xmas & A Happy New Year!

Wed, 24 Dec 2008 16:17:16 +0100

Merry Xmas and a Happy New Year to all of you and your families. I'm currently off visiting Good Old Home, and then again the annual Chaos Communications Congress in Berlin. Happy Holidays!

(courtesy xkcd.com)

BIOS update anno 2008

Tue, 11 Nov 2008 23:35:02 +0100

Open browser, navigate to mainboard manufacturer's hompage, find correct BIOS image and corresponding flash utility, download it! discover that you can only update BIOS via floppy disk. (mild profanity here). find a floppy. checked. floppy drive, huh? we've 2008 man! ok, go find a floppy drive. what about a floppy disk cable? Its not working. its just not working. try to tweak some bios settings in order to get the floppy disk drive going. no good. try another floppy drive. no good. another floppy cable? argl. (some more ~~mild~~ profanity here)

ok, now how do we get a bootable DOS disk? no Windows around here anymore. try google. find www.bootdisk.com, download dr-dos bootdisk. discover that it is a Windows executable. (the profanity thing again) go back to bootdisk.com and search for non-exe image files. checked. write image to floppy. man that thing is slooow! ages later, strange noises appear to be coming from the floppy drive. aaah, bad blocks! try another floppy. bad blocks again. (the profanity thing gets out of hand) some four or five floppy disks later we have a bootdisk. Hmpf!

On we go. boot from floppy. at the dos prompt, run the flash tool. aaah! no keyboard. wtf? obviously a USB-keyboard isn't the way to go here. find PS/2 thingy and retry. did I tell that it takes ages to boot from a floppy. *sigh*. eventually update BIOS, remove floppy drive and swear to never ever touch a floppy disk again. two hours of lifetime lost to some 20 year old piece of technology called floppy disk.

QR Code?

Fri, 17 Oct 2008 18:54:19 +0100

Just stumbled across an interesting documentary about the QR Code phenomenon in Japan. QR codes are simple two-dimensional bar codes capable of storing up to ~4000 characters of information. They typically look something like this:

Maybe you've seen them already. In Japan you can find them on buildings, billboards, magazine ads, product packages, etc. They're basically everywhere. In order to decode QR codes, you just take a picture with your cell phone. The (hopefully installed) QR code reader then decodes it and brings up the information. QR code readers are available for quite a lot of mobile phones already. If you want to, you can even generate your own QR codes.

P2V using Mondo Rescue

Mon, 06 Oct 2008 22:16:35 +0100

Over the last few weeks, I've been exploring ways to convert physical Debian Linux boxes into virtual machines. VMWare has a tool for doing P2V conversions, however, as far as I can tell, it only supports Windows physical machines. Not good. Any alternatives? Uhmm, how about Mondo Rescue?

Mondo Rescue is a disaster recovery software developed by Hugo Rabson for GNU/Linux. It allows one to effortlessly backup and interactively restore Linux systems. And what is most interestingly, it allows you to backup to a variety of media like CD-R, DVD and NFS shares.

So with Mondo Rescue, a Debian Etch box with two IDE disks (/dev/hda, /dev/hdc), Linux software raid (/dev/md0) and VMWare the process eventually goes like this:

install Mondo Rescue onto the system you want to convert
stop all problematic services (eg. databases, ...)
make sure the following linux kernel modules are loaded

mptspi mptscsih mptbase scsi_transport_spi scsi_mod sd_mod pcnet32

run "mondoarchive" and let it create a set of ISO images
boot the new VM with the first ISO image
at the bootprompt, type "interactive" to get started
since the device names have changed, mondo will complain about fstab, fix it (eg. repartition /dev/sda)
continue restoring all data
intitialize boot loader, set boot device to /dev/sda
edit grub.conf, update the line starting with "#kopt=root=...", set the boot device to /dev/sda1; also remove kernel options for serial console redirections
when mondo finishes, DO NOT REBOOT!
remount your disks (eg. mount /dev/sda1 /mnt, mount /dev/sda2 /mnt/usr and so on)
chroot into /mnt
edit /etc/mtab, fix the devices names to match the new installation
edit /boot/grub/devices.map (eg. echo "(hd0) /dev/sda" > /boot/grub/devices.map)
create a device node for sda (eg. mknod /dev/sda b 8 0)
run update-grub and also grub-install hd0
delete /etc/udev/rules.d/z25_persistent-net rule
exit, umount & reboot

If all went well, your virtual machine should now successfuly boot. Yay, Mondo Rescue!

Update: cyrus2courier 1.5-dev

Sat, 20 Sep 2008 00:28:10 +0100

Finally an updated development version of cyrus2courier is available. It currently features support for Cyrus v2.2+ setups and also Dovecot keywords. Please give it a try and provide feedback.

Madness 2.0

Thu, 11 Sep 2008 21:53:37 +0100

Yay, I finally did it. Switched the site to one of those hyped "Web 2.0"-style blog engines. So far it looks promising, I guess I even managed to successfuly convert everything from the old site. Feel free to take a look. In case you find anything missing, don't hesitate ... tell me.

Just in Case

Sun, 06 May 2007 22:05:20 +0100

Need a secure password? How about a random number? A nice sounding IPv6 address? Whatever your need, highly recommended: 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 -- Disclaimer: Any similarities to real numbers, integer or float, hex or not, are purely coincidental and unintentional.

Those were the days

Fri, 13 Apr 2007 18:41:47 +0100

Remember those point-n-click LucasArts adventure games? Yes?! Numerous hours of lost lifetime, and still you never finished 'em all, right? Well, fear no more .. here is your chance to speedrun some of those classics: Loom in 27 mins, Indiana Jones 3 - The Last Crusade in 27 mins, Zack McKracken in 34 mins and Maniac Mansion in 9 mins .. lean back and enjoy.

Happy New Year!

Mon, 01 Jan 2007 23:23:03 +0100

Yea, yeah .. back from the annual Chaos Communication Congress; wish you all a Happy New Year and a good start into 2007 ...

Bloat 2.0

Mon, 13 Nov 2006 19:33:47 +0100

Associated Press is reporting on Sun releasing Java under the GPL. Sun is hoping that this step will attract more developers, as well as extend the lifespan of Java. The article notes that this is 'one of the largest additions of computer code to the open-source community'.

Ruby Tuesday

Wed, 19 Jul 2006 00:12:06 +0100

Well, actually its wednesday now ... but i still found some interesting Ruby links while broswing the web: Closures in Ruby, Plugins for your Ruby Application, Ruby Network Programming, The Little Book of Ruby and a bunch of Ruby One-liners

Software War Map - Updated

Thu, 22 Jun 2006 23:31:13 +0100

Steven Hilton's famous graphic map depicting the epic struggle of Free and Open Source Software (FOSS) against the Empire of Microsoft has been updated. See. for yourself.