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1 definition found
 for SCSI adaptor
From The Free On-line Dictionary of Computing (30 December 2018) :

  SCSI adaptor
  host adaptor
  SCSI controller
  SCSI interface
  
      (Or "host adaptor") A device that communicates
     between a computer and its SCSI peripherals.  The SCSI
     adaptor is usually assigned SCSI ID 7.  It is often a
     separate card that is connected to the computer's bus
     (e.g. PCI, ISA, PCMCIA) though increasinly, SCSI
     adaptors are built in to the motherboard.  Apart from being
     cheaper, busses like PCI are too slow to keep up with the
     newer SCSI standards like Ultra SCSI and Ultra-Wide SCSI.
  
     There are several varieties of SCSI (and their connectors) and
     an adaptor will not support them all.
  
     The performance of SCSI devices is limited by the speed of the
     SCSI adaptor and its connection to the computer.  An adaptor
     that plugs into a parallel port is unlikely to be as fast as
     one incorporated into a motherboard.  Fast adaptors use DMA
     or bus mastering.
  
     Some SCSI adaptors include a BIOS to allow PCs to boot
     from a SCSI hard disk, if their own BIOS supports it.
  
     Adaptec make the majority of SCSI chipsets and many of the
     best-selling adaptors.
  
     Note that it is not a "SCSI controller" - it does not control
     the devices, and "SCSI interface" is redundant - the "I" of
     "SCSI" stands for "interface".
  
     (1999-11-24)
  

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