For those who interest for the end of the story.
We were lucky enough to found another pc with the exact same configuration
Same operating system, same harddisks, same motherboard, same cpu, same memory, even same controllers.
The new super pc belongs to the person that suggest the configuration described on the first post, as it was tested and trusted.
The method he followed to test the problematic hard disks is what i call a professional one.
He made a ghost of his own pc on a usb harddisk and we used that disk for the boot process.
We knew that if the format process of the problematic disks was ending successful, there was a problem on the operating system since the hardware part of both the ghost and the tested pc was almost identical
Unfortunately the same error occurred on both 250gb disks under dos and win xp
We know for sure now that both harddisk are problematic
The next step is to identify if it is a wider problem meaning that the all series is damaged or some problem occured during the carriage from WD to the shop
The full id of the disc is
WD 2500JD-00GBB0 02-05D02