Computer server

A computer server comprising:

• a plurality of drive bays, said drive bays each comprising two opposite sidewalls, a back wall, two sliding grooves respectively mounted on said two sidewalls, and a first female connector provided at said back wall;
• wherein at least one of the plurality of drive bays comprises a second female connector;
• and
• at least one combo device capable of correspondingly inserting into said at least one of the drive bays which having said second female connector;
• wherein, said at least one combo device comprising:
• an optical disk drive, said optical disk drive having an optical disk drive male connector;
• a floppy disk drive, said floppy disk drive having a floppy disk drive male connector;
• and
• a rack for stacking up said optical disk drive and said floppy disk drive, said rack comprising a base frame, two side bars fixedly provided at two opposite lateral sides of said base frame, two sliding rails respectively provided at said two side bars for coupling to the two sliding grooves of said at least one of the drive bays which having said second female connector, and a combo device male connector integrated with said optical disk drive male connector and said floppy disk drive male connector and electrically connectable to the second female connector of said at least one of the drive bays.