ST-506 - definição. O que é ST-506. Significado, conceito
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O que (quem) é ST-506 - definição

5.25 INCH HARD DISK DRIVE, INTRODUCED IN 1980
ST506; ST-412; ST-506; ST412HP; ST412
  • 5.25 inch MFM hard disk drive
  • Control Connector
  • Data Connector

ST-506         
<storage> The first full-height 5.25 inch hard disk drive for personal computers, introduced in 1980 by Shugart Technology (now Seagate Technology). The ST-506 stored up to 5 megabtyes after formatting using MFM encoding. It transferred data at 625 kilobytes per second. The ST-506 (like the ST-412) was interfaced to a computer via a disk controller. The interface was a faster version of the Shugart Associates SA1000 interface, which was in turn based upon the floppy disk drive interface. Two cables connected the controller to the disk. The 34-pin control cable controlled mechanical motion and data was read or written 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 revision to support Seagate's 10 MB ST-412 drive that was adopted for the IBM PC XT. Around 1990, SCSI and ATA superseded ST-506. These eliminated the problems of matching controllers to drives by physically integrating a controller with the drive, allowing interleave ratios and other disk parameters to be optimised by the manufacturer rather than the system integrator. Connector pin-out (http://www.gamesx.com/hwb/co_ST506.html). (2007-03-06)
506         
YEAR
506 (year); Year 506; AD 506; 506 CE; 506 AD; Events in 506; Births in 506; Deaths in 506
Year 506 (DVI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Messala and Dagalaiphus (or, less frequently, year 1259 Ab urbe condita).
Ralaniten acetate         
CHEMICAL COMPOUND
EPI-506; EPI506; EPI 506
Ralaniten acetate (developmental code name EPI-506) is a first-in-class antiandrogen that targets the N-terminal domain (NTD) of the androgen receptor (AR) developed by ESSA Pharmaceuticals and was under investigation for the treatment of prostate cancer. This mechanism of action is believed to allow the drug to block signaling from the AR and its splice variants.

Wikipédia

ST506/ST412

The ST-506 and ST-412 (sometimes written ST506 and ST412) were early hard disk drive products introduced by Seagate in 1980 and 1981 respectively, that later became construed as hard disk drive interfaces: the ST-506 disk interface and the ST-412 disk interface. Compared to the ST-506 precursor, the ST-412 implemented a refinement to the seek speed, and increased the drive capacity from 5 MB to 10 MB, but was otherwise highly similar.

Beginning with its selection as the hard drive subsystem for the original IBM XT disk drive controllers supporting the ST-412 interface grew to become ubiquitous in the personal computer industry, The ST-412 interface and its variants were the de facto industry standard for personal computer hard disks until the advent and wider adoption of the IDE or ATA interface in the early 1990s.

Both interfaces used MFM encoding; the subsequent extension of the ST-412 interface, the ST-412HP interface, used RLL encoding for a 50% increase in capacity and bit rate.