== Z-Drives (180K/side) ==
These are less expensive drives and were meant to be directly connected as B drive to a CPC 464 with DDI-1 or a CPC 664/6128. Since these drives ship neither with an own controller nor a [[VDOS]] ROM, they do rely fully on AMSDOS and thus only 40 tracks on one side can be accessed, resulting in the same capacity per disk (180K) as the 3" drives. The Z-drives were basically S-drives without a Vortex controller and CP/M license.
=== Variants ===