while doing more tests i ran the gsmartcontrol in my desktop, it has two hard disk, one ide and the other sata, both old hard disks
both reported a bunch of errors! specially the sata, can't remember the code of the stored in the log errors, many, it says that it stores only 5 so i think it should have many many more, i have used this hard disk since 2004 or 2005 so it is time to change it, will buy a 320 or 500 gb hard disk, i don't need more, in fact, never filled the whole 150 gbs on this hard disk
i used the tool 2 minutes test and both sounded like a machinegun firing!
anyway, both have always loud, specially the sata one
this tool and this gui are both impressive
doing more tests on the netbook running xp i discovered a annoying noise in the speaker and in the headphones, it seems to be that the sound card transmits most of the noises made by the heads moving in the hard disk and the motor to the headphones...
this defect doesn't happen in linux(another point for linux!), this is why i never noticed this problem
i don't use windows enough to join one thing to the other but the noise has always been there but since it doesn't happen on linux i took it as a a odd detail on the unit
the hard disk usage on linux is far inferior so the hard disk ends disabled more time and then noise can't be heard because the hard disk is disabled most of the time(noise form hard disk, not in headphones or speaker, it doesn't happen on linux)