This is the second time i installed a new toshiba 1tb hdd on my macbook pro unibody, and after some use i get the spinning rainbow and lots of hanging and do some checks with drive genius and it told me again i had bad blocks on the hdd!! When i first installed i tried checking for bad sectors and nothing appeared but now that i used the laptop they appeared Now tell me what im doing wrong because this is the second time it happens with the same brand ,model and capacity of hdd, 1 i format the drive to mac 2 install mac on the hdd running with an external hdd enclosure 3 restore my data with carbon copy cloner to the new drive 4 install on the macbook physically 5 run checks for verification of smart disc and permissions fixes. 6 update os if needed Am i missing something?? Is anybody else having this problems with the toshiba 1tb hdds? Im thinking on leaving this as a external hdd and buy a westerdigital ....good idea? Thanks in advance!!