Odyson - Hard Drive Cable Replacement for MacBook Pro 17" Unibody A1297 (Early 2009-Late 2011) Hard Drive Cable 17" A1297 (Early 2009-Late 2011) Compatibility: MacBookPro5,2 Early 2009 (MB604LL/A), Mid 2009 (MC226LL/A) Compatibility: MacBookPro6,1 Mid 2010 (MC024LL/A) Compatibility: MacBookPro8,3 Early 2011 (MC725LL/A), Late 2011 (MD311LL/A) APN: 922-8920, 922-9823 PPN: 821-0791-A, 821-1200-A Cable connects hard drive to logic board SATA plug allows for transfer of data Also provides power to the hard drive No need for extra cables Installation is quick Reliable parts that work the first time every time All connections are clean and intact 821-0791-A 821-1200-A