Seagate Medalist 8421 Installation Manual page 9

Medalist 8421, 6421, 4311 and 2112, Rev. A
Figure 1. Master and slave jumper settings
40-pin ATA
interface
connector
4-pin power
Master/slave
connector 2 4 6 8
jumper block
1 3 5 7
Master or single drive
Drive is slave
5