User guide

SC35 User Guide Ver 4.8 August 30, 2002 Page 20 of 25
5. INSTALLATION
5.1 Default Configuration
The default jumper switch configuration is given below. Always power down
the unit before changing the SCSI ID or write protect switches. Changing
these settings with power applied may result in the changes not being
recognized.
New with this revision is the addition of a jumper block on the front of the drive.
Please refer to the diagram below for the location of the block. Settings can
be made from either the switch located near the power connector, or the
jumper block. Setting either a switch on or placing a jumper on a block will
result in that setting being enabled. See definitions below.
DEFAULT JUMPER SWITCH CONFIGURATION
a. SCSI ID: Device 0
ID0 - ON Switch pos. 1 on E1 on
ID1 - ON Switch pos. 2 on E2 on
ID2 - ON Switch pos. 3 on E3 on
b. Writes: Enabled
WP* - OFF Switch pos. 4 off E4 off
c. Termination: Disabled E5 off
5.2 Hardware Installation Procedure
5.2.1 Verify that the drive is configured as required by the application.
Many SCSI controllers require that the system disk be addressed as device
0 or 1 on the SCSI bus. If a different ID is required, refer to section 6 for
proper switch settings.
5.2.2 Power off the computer system by throwing the main power switch.
5.2.3 Disconnect the AC power cord from the computer system.
5.2.4 Open the system to allow access to the drive bays and the card slots
as required.
5.2.5 If a SCSI initiator is not already installed in the system or on the
motherboard, then install that card.
5.2.6 Install the SC35 into a standard 3 1/2" drive bay, or using adapter
hardware, place the unit into a 5 1/4" drive bay. Any mounting orientation
is acceptable.
5.2.7 Attach the 50-pin flat ribbon connector from the SCSI initiator to the
SC35. If multiple devices are to be attached to the SCSI bus, then remove
any terminating resistors or disable active termination on those units not
at the END of the cable. Only the two devices at the ends of the SCSI bus
should have termination enabled. Failure to comply with this requirement
may cause erroneous operation of the SCSI bus.