Seagate U4 ST36421A - Manual (Page 26)

18 U4 Family Product Manual, Rev. D
2.2 Jumper settings
2.2.1 Master/slave configuration
The options jumper block (J8) shown in Figure 2 is used to configure the
drive for operation. It is the 6-pin dual header between the I/O connector
and the power connector. Use the following settings to configure the
drive as a master or a slave.
Master or single drive. The drive is configured at the factory for a master
or single-drive operation with a jumper set on pins 7 and 8.
Drive is slave. Remove the jumper to configure the drive as a slave.
Drive is master with a non-ATA-compatible slave. Set a jumper on
pins 5 and 6 and a jumper on pins 7 and 8. Use this jumper setting
only
if the drive does not work as a master with a jumper set on pins 7 and 8.
Figure 2. Master/slave jumper settings
Options jumper block (J8)
Drive is slave
Cable select
Master with a non-ATA-
compatible slave
Master or single drive
2 6 8 4
1 7 5 3