Microdrive

table of contents

Sinclair

the name Microdrive originally designated (1983) one of Sinclair Research Ltd. developed and for conditions at that time approve of and snap mass storages for of them Home computer of the ZX Spectrum -, and late QL - series.

In a special “cartridge” a chromium oxide volume connected to a continuous loop was, half as broadly as in at that time the popular audio CompactCassetten. Due to the Laufgeräusches and the uncommonConstruction way were called this volume in the jargon gladly as “racing tying lacings”.

In the drive assembly only mechanically (to the band control) modified a stereophonic sound head served for reading and writing the bits in brick arrangement.

Thus 85 KB (Spectrum) became and/or on a cartridge. approx. 100KB (QL, identical medium, closer recording format) stored.

IBM

today is above all (physically) a small non removable disk under this name well-known.

Microdrive of IBM with 1 GByte capacity
of this Microdrive is a miniaturized non removable disk in the format of a CompactFlash- Map, which was originally developed by IBM. In the meantime Microdrive stands for a whole class at storage media, which function all in the same procedure. Contrary to Flash storage, it is not a purely electronic storage medium, but an electromagnetic storage medium.

The map is 42.8 mm × 36.4 mm × 5 mm largely and had 50 pins.

history

the first generation of Microdrives had a capacity of 340 MT as well as 512 MT. Already the 340 MT versionby NASA one used, in order to put to the small computers in the Raumanzügen a sufficient data memory at the disposal. The subsequent generation had a capacity of 512 MT and 1 GB. In the meantime also Iomega sold 340 MT as a retailerVersion. Later Microdrives with a capacity were sold of 2,2 GB than so-called Magicstore.

After the sales of the non removable disk section of IBM at Hitachi Hitachi manufactures now „the original Microdrive “with 1 GB, 2 GB, 4 GB and 6 GB. Over itoutside also Seagate manufactures such drive assemblies with capacities of 2,5 GB and 6 GB.

Hitachi brought on it a Microdrive with 8 GB storage capacity out. This has a data rate of 8-12 Megabyte/s. In addition is this generation with a ESPsimilar system equipped, which notices impacts and gets the read-write heads immediately into the landing zone back.

use

of areas of application are above all PDAs and digital cameras as well as some MP3 players.

technology

Microdrives are miniaturized non removable disks, i.e. magnetic memory with high storage capacity and a magnet disk diameter from usually 1 tariff. They contain mechanical parts, in particular an engine, which the Akku of the utilizable equipment opposite non-mechanical memory stresses accordingly more strongly. By strong vibrations or to low air pressure can these small non removable disks to be damaged, for example by a Head Crash.

Since not all CompactFlash compatible devices support also FAT32, it can come straight with older devices to complications, if a Microdrive with more than 2 GB is used. Older devices supportnur FAT16, eine Höchstgrenze von del meist de los welches 2 GB de besitzt. Microdrives correspond to the design CF-II, are somewhat thicker therefore than herkömliche CF-I maps and can only in CF-II compatible devices be used.

The storage medium turns with 3.600 revolutionsper minute. The maximum data rate amounts to 4.2 MB/s. The equipment is 42.8 mm × 36.4 mm × 5 mm largely.

See also:

 

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