(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.