LVD

from The Free On-line Dictionary of Computing (8 July 2008)

Low Voltage Differential
LVD

   <hardware> (LVD) A method of driving {SCSI} cables that will
   be formalised in the {SCSI-3} specifications.  LVD uses less
   power than the current differential drive ({HVD}), is less
   expensive and will allow the higher speeds of {Ultra-2 SCSI}.
   LVD requires 3.3 Volts DC instead of 5 Volts DC for HVD.

   (1999-02-16)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

LVD
       Low Voltage Differential [technology] (SCSI, Symbois Logic)