I purchased two Seagate 500gb 7200.11's. One died last night (120) and one died last week (121). I am missing the part number on 121 as it has already been returned. Other than this latest replacement, I will never support Seagate again. They have lost my business for life. My info is as follows: 120:6QM0L8MC:9BX154-303:SD-15:09204:2008-12-29:RETAIL:jakamo:Canada:(no detect in BIOS):OSX86 121:6QM0K974:N/A:SD-15:09204:2008-12-29:RETAIL:jakamo:Canada:(no detect in BIOS):OSX86