Seagate Medalist 1640, Product Manual

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2.3.1 Master/slave configuration
Pins 1 and 2 and pins 3 and 4 on the options jumper block are used to
configure the drive as the slave or as the master with a slave present.
One drive only. The drive is configured at the factory for single-drive
operation. No shunts are placed on pins 1 and 2 or pins 3 and 4. The
spare shunt on pins 2 and 4 does not affect drive operation.
Drive as slave. Place a shunt on pins 1 and 2.
Drive as master with a slave present. Place a shunt on pins 3 and 4.
2.3.2 ATA master/slave timing compatibility
You can extend the length of time the Seagate drive as master waits for
the slave to respond before it reports the status of both drives to the host
during the boot cycle. When a shunt is placed on pins 5 and 6, the
Seagate drive waits 30 seconds for the slave to signal that it is ready to
give status. The default setting allows the slave five seconds to respond.
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 can 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.
Medalist 1640 and 2140 Product Manual, January 1996 21