Master/Slave Configuration; Master/Slave Timing Compatibility; Remote Led Connection - Seagate Medalist SL Product Manual

Medalist SL Family Product Manual, June 1996 21

2.3.1 Master/slave configuration

One drive only. The drive is configured at the factory for single-drive
operation. The spare jumper on pins 2 and 4 does not affect drive
operation.
Drive as master. Place a jumper on pins 3 and 4.
Drive as slave. Place a jumper on pins 1 and 2.

2.3.2 Master/slave timing compatibility

The drives are shipped with a jumper placed on pins 5 and 6. This
configuration is active when the drive is used as the master with a slave
present. It causes the Seagate drive to wait up to 30 seconds for the
slave to assert PDIAG–. A 01 is placed in the Error register whether or
H
not PDIAG– is asserted.
If the jumper on pins 5 and 6 is removed, the Seagate master waits up
to 5 seconds for the slave to assert PDIAG– and places 01 in the Error
H
register if the signal is asserted or 81 if the signal is not asserted.
H

2.3.3 Remote LED connection

Pins 11 (−) and 12 (+) on the options jumper block are used to connect
the drive to a remote LED. The LED is polarized and may be damaged
if connected incorrectly.
It may be necessary to replace the current connector on the LED cable
to fit the options jumper block. Use Seagate part number 13211-001 or
an equivalent for the replacement connector.