Curruntly I am using a notebook HP Pavilion dv6. 1 year ago My original 750B hard drive ''broke'' as a person that fixed my notebook said. And I bought a new one for 350B or so. Today I wanted to connect my old hard drive and see if it still works etc. what I am asking is what if I will dissconect my 350B drive and connect my old one, lets say it didnt work my notebook didnt work. And I place my 350B back agian. Will this proccec brake/change anything in my pc information I mean my notebook wont go crazy and delete/change some of it information/settings? Is it safe?