Yes but if that drive also got problems, i cant get further.. So its better to align the drive..

Hmmm keep in mind it could also be a different problem. There are so many possibilities from a broken motor, stuck mechanics and so on. Also make sure the belt is still fine. If you have an oscilloscope you can also go without an allignment disk.

http://www.classic-computers.org.nz/blog/2010 … tandon-m100.htm

I havent had an allignment disk in my hands since like 1986. And keep in mind that unless you use an analog one & oscilloscope or probe you will still need a way to read the disk, it is by no means a wonder disc that you just insert and the drive hops from read errors to a working drive just by magic.

Dave's imagedisk has an allignment feature if i remember right, so if you can get them on your machine you might wanna try that.

http://www.classiccmp.org/dunfield/img/index.htm

And before you make the allignment even worse be sure to check if its really the problem. Misalligned drives typically give read/write (I/O) errors. SOmetimes they can even format a disk but not read any disks formatted on other computers. As Mr. Seib says "An allignment disk should only be used on drives that can read what they write themselves." Some generic "Drive not ready" error does not need to hint to misallignment, could also be a broken belt or whatever.

If you look what a professional allignment disk, oscilloscope/probe and software cost then you can probably buy 50 new drives.

More reading on floppy drives (Pretty good!):

http://www.hermannseib.com/documents/floppy.pdf