ST-506

(storage)The first full-height 5.25 inch hard disk drivefor personal computers, introduced in 1980 by ShugartTechnology (now Seagate Technology). The ST-506 stored upto 5 megabtyes after formatting using MFM encoding. Ittransferred data at 625 kilobytes per second.

The ST-506 (like the ST-412) was interfaced to a computervia a disk controller. The interface was a faster versionof the Shugart Associates SA1000 interface, which was inturn based upon the floppy disk drive interface. Two cablesconnected the controller to the disk. The 34-pin controlcable controlled mechanical motion and data was read orwritten serially using two pins of the 20-pin data cable.

Other companies copied the interface, creating a universal de facto standard that was further strengthened by its revisionto support Seagate's 10 MB ST-412 drive that was adopted forthe IBM PC XT.

Around 1990, SCSI and ATA superseded ST-506. Theseeliminated the problems of matching controllers to drives byphysically integrating a controller with the drive, allowinginterleave ratios and other disk parameters to be optimisedby the manufacturer rather than the system integrator.

Connector pin-out.

单词	st-506
释义	ST-506 ST-506 (storage)The first full-height 5.25 inch hard disk drivefor personal computers, introduced in 1980 by ShugartTechnology (now Seagate Technology). The ST-506 stored upto 5 megabtyes after formatting using MFM encoding. Ittransferred data at 625 kilobytes per second. The ST-506 (like the ST-412) was interfaced to a computervia a disk controller. The interface was a faster versionof the Shugart Associates SA1000 interface, which was inturn based upon the floppy disk drive interface. Two cablesconnected the controller to the disk. The 34-pin controlcable controlled mechanical motion and data was read orwritten serially using two pins of the 20-pin data cable. Other companies copied the interface, creating a universal de facto standard that was further strengthened by its revisionto support Seagate's 10 MB ST-412 drive that was adopted forthe IBM PC XT. Around 1990, SCSI and ATA superseded ST-506. Theseeliminated the problems of matching controllers to drives byphysically integrating a controller with the drive, allowinginterleave ratios and other disk parameters to be optimisedby the manufacturer rather than the system integrator. Connector pin-out.
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