Yamaha CRW2100SX - Manual (Page 22)

Setup Procedures
13
2 Termination
Terminators prevent SCSI signals from being reflected off the last device in the
chain. The SCSI terminator switch should be set to “ON” if your CRW2100SX
drive is the last device on the SCSI chain. If it is not the last device on the chain,
the TERMINATOR switch should be set to “OFF.”
Computer
Hard disk drive
(unterminated)
CRW2100SX
Terminator ON
SCSI card
n By factory default, the Terminator switch is set to “ON.”