Dual-Drive Emulation; Remote Led Connection; Cable-Select Option - Seagate Decathlon 850 Product Manual

22

2.4.4 Dual-drive emulation

Dual-drive emulation is a feature designed into drives with physical
capacities greater than 528 Mbytes for computers whose BIOS limit the
effective drive capacity to 528 Mbytes. This feature splits the drive into
two logical drives with capacities the computer can manage. The one
drive emulates two drives. Each logical drive is assigned a drive type in
System Setup and must be partitioned and formatted independently. A
second, physical drive cannot be used when dual-drive emulation is
invoked.
Note. Dual-drive emulation cannot be used in computers that implement
the cable-select configuration.

2.4.5 Remote LED connection

You can attach a remote LED cable to the options jumper block (J8) using
the pins shown in the drawings. The jumper block is designed to accept
a 2-mm connector. It may be necessary for you to replace the current
connector on the LED cable. Use Seagate part number 13211-001 or an
equivalent for the replacement jumper.

2.4.6 Cable-select option

Computers that use the cable-select method for determining the master
and slave drive do so by selecting or deselecting pin 28, CSEL, on the
interface bus. Master and slave drives are determined by their physical
position on the bus:
• The drive plugged into the I/O connector that carries the CSEL signal
is the master.
• The drive plugged into the I/O connector that does not carry the CSEL
signal is the slave.
To configure the ST5850A for computers using cable select, refer to
Figure 4 on page 19 for Type A drives or Figure 6 on page 21 for Type
B drives. Figure 7 shows how the drives are connected to the interface
cable in computers using cable-select.
Decathlon 850 ATA Product Manual, July 1995