The speed metal act SDI from Germany , was formed in the year 1986 by Reinhard kuese ,
And Ralf Maunert both who had both learned their craft with hard rockers BLACK JACK CO. After recording a first demo tape called
“Bloodsucker” ,
Franck another former BLACK JACK CO. member completed the line-up and SDI Released their debut album “Satan´s Defloration Incorporation” in 1988.In 1986.In 1987 ,second LP “Sign off the Wicked” Came out .followed up by “Mistressed” in 1989.
Between1991 and 1993 the band out a 4”album that remained unreleased.
All its songs can now be found as bonus tracks one the reissues.
