MySQL: 1030: got error 28 from server handler

[beuten]

I'm trying to back up my mySQL database and restore it to another database on the same Linux server (using XAMPP). During this process I received an Error 28 which means that I am running out of disk space.

I tried following the instructions at http: textsnippets.com/posts/show/132, but XAMPP has chkservd, mysql and myisamchk in different locations and I cannot find them. Any ideas?

In addition, when I enter df -h I get the following
Filesystem Size Used Avail Use% Mounted On
/dev/sda3 1012M 941M 20M 98% /
/dev/sda1 16M 2.4M 13M 17% /boot
/dev/sda4 74G 33M 71G 1% /data

As you can see my sda3 is giving me problems. I can't figure out how to increase the size.

Can anyone help me or give me some tips on how to resolve the problems?

Thanks!!
Beuten