Microdrive

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Microdrive

An earlier, ultra-miniature hard disk from Hitachi Global Systems. The Microdrive was introduced by IBM in 1998 and acquired by Hitachi in 2002. It contained a single disk platter the size of an American quarter, and starting out at 170MB of storage, it evolved to 8GB by 2006. Using one or two giant magnetoresistive (GMR) heads, the entire mechanism was built into a Type II CompactFlash card. See magnetoresistance and CompactFlash.

Size Matters
Because the tiny actuator had 50 times less inertia than one used in a regular disk drive, it could ramp up to full speed in half a second. As a result, the drive could stop spinning when data were not being accessed, conserving power in handheld devices. By the mid-2000s, CompactFlash flash memory cards began to exceed the Microdrive's capacity. See Kittyhawk and actuator.


The Microdrive
A marvel of electromechanical technology, the Microdrive platter stopped rotating to conserve power and ramped up to full speed in half a second.
References in periodicals archive ?
The contract is for the supply of equipment for the laboratory of mechatronic systems and microdrives for the faculty of mechanical engineering within the project create a modern technical infrastructure for the implementation of the educational program of the future engineers at the technical university of gdansk.
Precision Microdrives carries the worlds most comprehensive range off-the-shelf range of DC vibration motors over 3 ranges, from 4mm diameter to 60mm diameter.
Charmed is building another, high-end version that will take advantage of IBM's Microdrive hard drives to provide a whopping 1 gigabyte of on-badge storage.
Precision Microdrives carries the worlds most comprehensive off-the-shelf range of DC vibration motors over 3 ranges, from 4mm diameter to 60mm diameter.
The Microdrive is standard equipment only on a few high-end professional digital cameras and on one mid-priced "prosumer" camera (Casio's model QV-2300UX Plus).
A lot of the small vibration motors produced by Precision Microdrives are used in equipment to agitate liquids, powders, jewels, leads, beads, pellets and the like.
The 20mm vibrating motor has solder terminal tags for electrical connections, though Precision Microdrives frequently adds customised leads, harnesses and connectors based on customer specifications.
com)-- Precision Microdrives has recently included a 6mm through-hole PCB mounted vibrating motor with multi-mounting points for extra secure mounting, within it's Pico Haptic[TM] range of miniature vibration motors.
5GB and 4GB microdrives are being integrated into cellphones, some companies are developing augmented SIM card memory, and a Taiwanese consortium recently announced a new card format.
Precision Microdrives back up this range, with a good deal of experience and free integration support.
The drives can accommodate most card formats including Secure Digital (SD), MultiMediaCard, Sony Memory Stick, Compact Flash Types I and II, MicroDrives, SmartMedia and xD.
Some recent applications that Precision Microdrives have worked on, include watches, GPS receivers, heart rate monitors, RFID & barcode scanners, medical devices, and even drum sticks.