SCSI
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Small Computer System Interface is a set of standards for physically connecting and transferring data between computers and peripheral devices, best known for its use with storage devices such as hard
Adaptec ACB-4000A SASI card from 1985
Assorted Parallel SCSI connectors
Bus terminator with top cover removed
Parallel ATA
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Parallel ATA, originally AT Attachment, also known as Integrated Drive Electronics, is a standard interface designed for IBM PC-compatible computers. It was first developed by Western Digital and Comp
Two ATA motherboard sockets above, with an ATA connector below
IDE Connectors in PC Chips M925LR Pentium 4
Example of a 1992 80386 PC motherboard with nothing built in other than memory, keyboard, processor, cache, realtime clock, and slots. Such basic motherboards could have been outfitted with either the ST-506 or ATA interface, but usually not both. A single 2-drive ATA interface and a floppy interface was added to this system via the 16-bit ISA card.
44-pin PATA connector on a 2.5-inch drive, with 4 pins on the side for Master/Slave selection.