the voltage starts to oscillates because of the repeated switching of the AC units .
Now what it has to do with me, this fluctuation is screwing up my pc. Of course i have UPS but it has aged and needs a battery replacement. I decided to go for new UPS which will do safe shut down of the pc when the battery power become very low. and the episode of buying has already been talked in my previous entry ....
Now my hard disk which had an windows installation, because of the improper shut down, some dll has got corrupted, which i have immediately replaced by downloading from the net. Later when i read the review regarding the dll downloads, it was reported such operation are not safe, any way the mistake has already has been committed, my pc now is in running condition but it hangs frequently.
The major event was when repeated power breakage completely thrashed my hard disk, my hard disk as an physical entity was not detected during boot. I was able to hear a different sound coming out. In order to isolate the sound i removed the sata drive. Later in order to test the hard disk i kept the sata device out side my pc , reboot and the i was able to hear same sound.
Fine i have found the source of the sound but my hard disk still does not work. I remember in my colleagues house the sata drive was kept upside down, i did the same and my hardisk started to work, got lucky . Immediately i moved the data from "my documents" to another partition, a partition which can be accessed from linux .