I was having boot issues where I couldn't boot into OSX. Thought the hard drive was bad. So I installed OSX on a flash drive, booted with that drive and used Diskwarrior to save my files. I purchased a new hard drive and tried 100 different times to format the drive using disk utility. It would not work. Would get input/output error and can't allocate memory error. POSIX reports: The operation couldn’t be completed. Cannot allocate memory and POSIX reports: The operation couldn’t be completed. Input/Output error For fun I put the old drive back in (which accord to all reports the health was fine) and that wouldn't format either. Upon research, could be the SATA cable. Won't know until I swap the cable. If it is the cable how was disk warrior able to communicate with the drive? If not the cable, any ideas on why I can't format?