I HAVE TWO HARD DISK............ one is master and other slave but on restarting computer ,, sometimes,, the slave hard disk is not displayed in "my computer" so i have to restart and go to bios to reconfigure and search for slave disk manually. but then my Windows xp takes stagerring 17 mins to boot ... also there is a problem with the hard disk that is slave .... when i try to make it master it takes 27 min to boot....... and every time at booting there is a msg displayed saying ..."your boot sector needs to be modified. press y to continue or n to abort" what is the problem ????