ESDI

from The Free On-line Dictionary of Computing (8 July 2008)
Enhanced Small Disk Interface
ESDI

   <storage, hardware> (ESDI) An obsolete {hard disk}
   {controller} {standard}, first introduced by {Maxtor} in 1983,
   and intended to be the successor to the original
   {ST-506}/{ST-412}.  ESDI was faster and more reliable, but
   still could not compete with {IDE} and {SCSI}.

   EDSI used two cables: a 20-pin data cable to each drive and a
   single 34-pin control cable {daisy chain} with the controller
   at one end and a terminator at the other.  In PCs, it
   supported up to two drives at 1-2MB/s with drives up to 2GB.

   PC Guide
   (http://pcguide.com/ref/hdd/if/obsoESDI-c.html).

   (2003-08-01)