D sharp | E flat minor key and scale on piano

The relative major scale of D sharp minor is F sharp major while D sharp major is its parallel major scale. D sharp Major is generally substituted by E flat major.
Sometimes you can find 6 sharp key signatures in the staff of a bass clef with A sharp on the top line.

E flat minor key : enharmonic scale of D sharp minor

It is interesting to notice that in both volumes of Johann Sebastian Bach’s The Well Tempered Clavier, the eighth prelude in E flat minor has its relative and subsequent fugue in D sharp minor key.
Music written in this key is considered exceedingly difficult to read, leading to infrequent use of D-sharp minor as the principal key center of pieces in the Classical era. E flat minor key notation is more manageable for woodwinds and brass instruments.