Active to Passive: The physical pieces that make up a computer system are...

[Abdellah9904]

Active : "The physical pieces that make up a computer system are called the hardware"

Passive 1 : "The physical pieces that a computer system is made of are called the hardware"

Passive 2 : "a computer system is made of the physical pieces that are called the hardware"

Which is the correct passive form, 1 or 2 ?

[Michauek]

Both are correct.
_________________
Experience is the name everyone gives to their mistakes. Oscar Wilde
Michal. I'm an english student :-)

[Jamie (K)]

Actually, both are incorrect, because the writer did not capitalize or punctuate correctly.