The perfect enterprise storage solution for Windows and Mac desktops and RAID systems, the 250 GB Western Digital Caviar (WD2500AAJB) is a 3.5-inch internal hard drive. The PATA interface enables you to transfer data between the WD internal HDD and the host, at speeds of up to 100 Mbps. With an 8 MB cache memory, this internal hard drive lets you search and retrieve stored records in seconds. The S.M.A.R.T technology of the Western Digital Caviar (WD2500AAJB) avoids unexpected downtime and data loss. The IntelliSeek feature reduces the power consumption rate of this WD internal HDD, improving its performance.