This is a Hitachi 250GB 5400RPM SATA Laptop Hard Drive. Its model number is HTS543225A7A384. This Hitachi HTS543225A7A384 SATA 2.5" hard drive series features durable and reliable hard disk drives with PMR technology. The SATA hard drives have a low power consumption and reduced acoustic noise, making these 2.5" 5400RPM hard drives an excellent choice for your high capacity notebook storage needs. These drives are pulled and tested from various off-lease HP laptops.