Hitachi Drives Disks To 10,000RPM.Hitachi Hitachi (hētä`chē), city (1990 pop. 202,141), Ibaraki prefecture, E central Honshu, Japan, on the Kashima Sea. The city is a leading producer of Japan's electrical equipment. America, Ltd. announced a family of 10,000RPM (1) (Revolutions Per Minute) With electric and electronics devices, RPM measures the rotational speed of the motor's spindle. Floppy disks rotate at 300 RPM, while hard disks rotate from 3,000 to 15,000 RPM. 3.5-in. disk drives for use in computer storage systems, including servers and Storage Area Networks. Hitachi America engineered the drives to achieve rotation rates and corresponding increase in data access speeds, while limiting power consumption to a range of 8.5W (for the 18.4GB model) to 15W (for the 73.9GB drive). Thus, the drives are suited for installation in workstations and server systems. With capacities reaching 73.9GB and average data access rates of 6ms, the new drives reinforce Hitachi's position as a leader in applying drive technology to production level products. The company's latest 3.5-in, disk drive family includes three models: the DK31CJ-72 is a 73.9GB, 41mm (1.6-in.) height drive; the DK32CJ-36 and DK32CJ-18 offer 36.9GB and 18.4GB capacity, respectively, in a 25.4mm (1-in.) height package. These capacities are made possible by incorporating density technologies from Hitachi America, Ltd.'s 2.5-in. drive products, including Giant Magneto-resistive heads and MEEPRML MEEPRML Modified Enhanced Extended Partial Response/Maximum Likelihood (hard drives) (Modified Extended Extended Partial Response Maximum Likelihood (storage) Partial Response Maximum Likelihood - (PRML) A method for converting the weak analog signal from the head of a magnetic disk drive into a digital signal. PRML attempts to correctly interpret even small changes in the analog signal, whereas peak detection relies on fixed ) read channels. These are Hitachi America's first 10,000RPM drives for the computer and storage systems OEM (Original Equipment Manufacturer) The rebranding of equipment and selling it. The term initially referred to the company that made the products (the "original" manufacturer), but eventually became widely used to refer to the organization that buys the products and and integration markets, which the company has served in the past with a line of 7,200RPM drives. The new 3.5-in. drives are scheduled for sample release in the first quarter of 2000 with production ramp-up following in the second quarter. |
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