yup via disk utility, I booted up from Lion ( external) opened up disk utility got that error message and actually another one at times something along the lines of can not write of the device last block, I tool it to apple a week ago and they said its a HD issue, I purchased my own , but now cant format it, could it be a Hard Drive Cable issue? and will Apple fix that without insisting on buying a HD from them? or refuse to touch my MBP because it has a non apple HD