Timeline_ 50 years of hard drives _ pcworld

Over the past five decades, hard drives have come a long way. Msci world dividend yield Travel through time with us as we chronicle 50 milestones in hard-drive development–from product firsts to new technologies, and everything in between.

1956: IBM ships the first hard drive in the RAMAC 305 system. Msci world quality index etf The drive holds 5MB of data at $10,000 a megabyte.

Msci world index fact sheet The system is as big as two refrigerators and uses 50 24-inch platters. Msci emerging markets index etf (For the full story and interviews with key players, read ” The Hard Drive Turns 50.”)

1973: IBM announces the 3340, the first modern “Winchester” hard drive, which has a sealed assembly, lubricated spindles, and low-mass heads.

1978: First RAID (Redundant Arrays of Independent Disks) technology patent is filed. Msci index announcements (Read ” How to Buy a Hard Drive: Key Features” for a description of this technology.)

1981: Shugart Associates joins NCR to develop an intelligent disk drive interface called the Shugart Associates Systems Interface (SASI), a predecessor to SCSI (Small Computer System Interface).

1985: Control Data, Compaq Computer, and Western Digital collaborate to develop the 40-pin IDE interface. Msci index definition IDE stands for Intelligent Drive Electronics, more commonly known as Integrated Drive Electronics.

1985: Quantum introduces the Plus Hardcard, which allows the addition of a hard drive without an available bay or a separate controller card.

1985: Western Digital produces the first ESDI (Enhanced Small Device Interface) controller board, which allows larger capacity and faster hard drives to be used in PCs.

1988: Prairie Tek releases the 220, the first 2.5-inch hard drive designed for the burgeoning notebook computer market; it uses two platters to store 20MB.

1988: Connor introduces the first 1-inch-high 3.5-inch hard drive, which is still the common form factor. Ishares msci world index Before this, hard drives were either full height or half-height.

1991: IBM introduces the 0663 Corsair, the first disk drive with thin film magnetoresistive (MR) heads. Msci world usd It has eight 3.5-inch platters and stores 1GB. Www msci com (The MR head was first introduced on an IBM tape drive in 1984.)

1994: Western Digital develops Enhanced IDE, an improved hard drive interface that breaks the 528MB-throughput barrier. Msci emerging markets index country weights EIDE also allows for attachment of optical and tape drives.

1997: IBM introduces the first drive using giant magneto resistive (GMR) heads, the 16.8GB Deskstar 16GP Titan, which stores 16.8GB on five 3.5-inch platters.

2000: Maxtor buys competitor Quantum’s hard drive business. Msci world index ytd At the time, Quantum is the number-two drive maker, behind Seagate; this acquisition makes Maxtor the world’s largest hard drive manufacturer.

2002: Among its many 2002 technology accomplishments, Seagate successfully demos Heat-Assisted Magnetic Recording. Msci world quality etf HAMR records magnetically using laser-thermal assistance and ultimately aims to increase areal density by more than 100 times over 2002 levels.

2003: Western Digital introduces the first 10,000-rpm SATA hard drive, the 37GB Raptor, which is designed for the enterprise, but which gamers quickly learn is a hot desktop performer in dual-drive RAID setups.

2005: Toshiba introduces its MK4007 GAL, which stores 40GB on one 1.8-inch platter, fielding the first hard drive using perpendicular magnetic recording.

2006: Seagate’s Momentus 5400.3 notebook hard drive is the first 2.5-inch model to use perpendicular magnetic recording, which boosts its capacity up to 160GB.

2006: Western Digital launches its 10,000-rpm Raptor X SATA hard drive, boosting its capacity to 150GB and placing a flashy transparent window that allows specially designed computer cases to showcase its inner workings.

2006: Cornice and Seagate each announce a 1-inch hard drive that holds 12GB. Msci world net returns The drives are slated to ship in the third quarter of 2006. Msci it Rex Farrance is PC World’s senior technical editor.