These 7 200 rpm hdds provide 35 inch form factor options that can be used as simple swap sata drives the hdd offerings for the ibm system x family of 35 inch sata hdds are the highest performing sata options and provide a wider selection of choices to satisfy a range of applications these drives are positioned at the top of the ibm sata hdd line based on increased performance designed for system x3300 m4 35x3500 m4 35x3550 m4 35x3650 m4 35