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Messages - Volker Dirr

Talk It Up! / Re: Clone a hard disk
January 10, 2009, 12:51:59 PM
G4U do an image of the whole disk (or part of the disk). But it compress the image, so it is smaller.
It is also good to "fill" the unused disk space with the same caracter (just have a look at the g4u homepage) after you prepared the first computer that should be cloned. Because:
1. The disksize of the image will be much smaller by that.
2. Compressing and decompressing the image is much faster.
But overall it is of course (a little bit) slower and imagesize is (a little bit) bigger then a tool that only clone the files of the disk.
I know that disadvantages, but i still prefer a tool that clone the whole disk, because cloning a whole disk has an other advantage:
3. You are not able to recover old files by an file recovery tool. So if i clone the whole disk with g4u (and not only the files like some other cloning tools), then the students can't recover work, solution or information from a previous year by an file recovery software.
Talk It Up! / Clone a hard disk
January 03, 2009, 12:23:49 PM
An other very useful tool in school is a hard disc cloning tool.
So you just need to install one computer of a student and just clone the disk of that computer to all other computers.

My favorite tool for cloning g4u.

It is very small, so it boot very quick and you just need to write one command.

You also need a ftp server for this.
So linux users can install the ftp server of their distribution.
Windows users can use fileZilla server.

But i hope i am allowed to buy a NAS hard disk drive next time :-)

There are also other cloning projects, but i didn't use them. (I am using g4u several years now and the other projects were not so stable as g4u in the past. But my test a very old, i think it already changed. The other projects are more complex today. So i fear they need longer time to boot and you must click or write more to clone a disk.

Maybe try yourself and tell me your experience.

The other tools are:

Talk It Up! / Re: Open Source OMR
November 30, 2008, 01:13:11 PM
sorry, i don't know any free omr software.

maybe you should ask that guys that code free ocr software, maybe they know a free software.
Talk It Up! / Re: Music teachers' software
May 03, 2011, 07:29:26 PM
Maybe check also this:
Talk It Up! / Music teachers' software
April 29, 2011, 01:21:40 PM
If you are a music teacher maybe check this software:
Talk It Up! / Re: interactive physics
July 22, 2010, 06:59:11 PM
Looks like crocodile clips is now free for home use (NOT for school). (compare )
but i am still searching for an alternative software.
Talk It Up! / interactive physics
May 03, 2009, 01:12:12 PM
currently we use closed software for this (crocodile clips / crocodile physics). But maybe someone knows good free software.

looks like there will be a strong free mechanical interactive software soon (free use in schools, but still closed source). it's working fine. i am just not 100% sure how to use it in school best, because i think our pupils can and should do that always in real practice.
have a look at:
Talk It Up! / Re: Learning Management System
May 19, 2010, 06:38:29 PM
thank you for information. our students are around 10 to 17 years old. (Grade 6 to 10). many students have internet/computer at home, but not all (i asked in a few classes a few days ago and there are still some students per class without an computer/internet at home.)
we have around 600 students at school, but "only" 2 computer rooms.
so i ask myself if it is useful to use learning management system in that situation.

i guess you have less students without internet/computer at home and you have more computers at school.
Talk It Up! / Learning Management System
May 14, 2010, 10:13:49 AM

i just read about Learning Management System like moodle. looks interesting.
Anybody in this forum who use moodle or other Learning Management Systems? Maybe you tested it also practicaly and can write a few advantages or disadvantages of your software?

if you don't know such software maybe have a look at

and/or search for "Learning Management System" or "Virtual Learning Environment" in the internet.
Talk It Up! / Re: The count of FET downloads
September 06, 2009, 10:51:11 PM
Downloads are also high on my mirror. The exe file was downloaded 869 times in the last 5 days (so ~170 downloads per day). The source was downloaded only 323 times in the last 5 days (so ~65 downloads per day).
Talk It Up! / Re: Web based school administration systems
September 13, 2009, 11:25:07 AM
I think the biggest problem are not the computers. that power is just a question of money (just buy more or more powerfull computers or just get a provider with a more powerfull internet connection).

in my opinion the "problem" is data protection. even germans have a data protection law, several guys still "fight" for a tougher law. (and in my opinion they are right in several points.)

if you want to read a current domanstration read this:

it's german. you can translate it with google:
Talk It Up! / Re: Web based school administration systems
September 11, 2009, 12:44:53 PM
i think it will be possible to split such request on several computers. so i guess it it not limited in speed if you have enough computers for this task. have a look at ebay, amazon, google, ... they also run fast even million guys work at the same time with that software. they work all on independent tasks, so it is possible to paralize it. (i think, i haven't exerience in coding that, but the other guys can do it also. so why not also the education web based systems.)
Talk It Up! / Re: Web based school administration systems
September 09, 2009, 06:56:02 PM
I think it is just because of security and/or data privacy protection.

I guess there are also other countries where such systems are not allowed because of data privacy protection. There are several countries in the world where you don't need to prove one's identity because of data privacy protection law. In some countries this law is pretty "strong".

But in Germany for example you need to prove your identity (but you don't need to carry always your id-card). But on the other side we always try to keep privacy. For example if the police find the DNA at a crime scene and later identify that DNA as yours, then the police is not always allowed to keep that data. If you done a "strong" crime (like killing), then the police is a allowed to store your name, adress, plaint and DNA in a database. But if you done a "weak" crime (like stealing), then the police is also allowed to store your name, address and plaint, but they are not allowed to keep your DNA. (They can keep also a picture and the fingerprint.) Little bit stupid, but that are all data privacy protetions law problems. Also there are rules that some data must be deleted afer a special time.

Talk It Up! / Re: Web based school administration systems
September 08, 2009, 10:12:02 PM
(if i understand correct) In German Federal Land NRW it is illegal to use a webbased school administration tool by internet. compare this law:
Talk It Up! / Re: Web based school administration systems
September 08, 2009, 09:50:55 PM
In Germany each German Federal Land (Germany has 16) is itself liable for school systems/questions.

As far as i know no German Federal Land has an Web Based Software.

(Some) Lands use own (not web based) school administration software. But even it is not web based there is a lot of trouble with that in a few lands, because German school systems are very complex.