50pin
Scsi Cable (or more commonly know as the ribbon cable)
The SCSI cable.
SCSI
IDE (Integrated Drive Electronics) devices such as hard drives and DVD drives use this old flat cable type (PATA = Parallel AT Attachment). These are now generally replaced by SATA (Serial AT Attachment), which exploits improved data controller speeds. See PATA in wikipedia. SCSI cables for multiple devices can be flat as well.
Either SCSI or IDE (PATA).
Performance may suffer; the initiator (SCSI controller) may not see the SCSI targets (i.e, disks) ... or they may disappear at some really bad time; or performance might be great but you will get a lot of errors and data corruption ; The correct answer depends on a lot of variables including cable length; whether or not the controller and/or any of the disks are terminated; type of SCSI you use; quality of SCSI cabling; and SCSI device physical topology. Your computer may not even boot or spin up the whatever is connected to the SCSI controller. Bottom line, SCSI absolutely must be terminated properly. If it isn't, bad things may happen at unpredictable times.
IDE Cable (40 Pins for Hard Disk and CD/DVD)Sata Cable (For SATA Hard Disk)34 Pins Flat Cable (For Floppy Drive)80 Pins SCSI Cable (Normally in Server, Not in Desktops)USB header cableGame Port header cable
Parallel printers and scsi
i/o card
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Active
i/o card