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62 ASUS TXP4-X User’s Manual
SCSI Device 1
SCSI Device 2
Termination Required
(End Device)
Termination Required
(JP5 Open)
Termination Required
(End Device)
SCSI Device 3
SCSI Device 4
SCSI Device 2
SCSI Device 1
Termination Required
(End Device)
No Termination Required
(JP5 Short)
SCSI ID Numbers for SCSI Devices
All SCSI devices, including the ASUS PCI-SC200 and ASUS PCI-SC860 interface
card must have a SCSI identification number that is not in use by any other SCSI
device. There are eight possible ID numbers, 0 through 7. The ASUS PCI-SC200 and
ASUS PCI-SC860 cards have fixed SCSI IDs of 7. The SCSI ID serves two purposes:
• It uniquely defines each SCSI device on the bus.
• It determines which device controls the bus when two or more devices try to use
it at the same time.
SCSI IDs on one channel do not interfere with the IDs on another channel. This ap-
plies to two SCSI host adapters that implement different buses as well as dual channels
on a single host adapter. You can connect up to seven SCSI devices to the interface
card. You must set a SCSI ID number (ID 0 to ID 6) for each device. SCSI devices
vary in how they set the ID number. Some use jumpers, others have some kind of
selector switch. Refer to the manual for any device you install for details on how to set
its ID number.
SCSI ID Priority
The ASUS PCI-SC200 and ASUS PCI-SC860 are 8bit single-channel SCSI cards.
SCSI ID 7 has the highest priority, and SCSI ID 0 has the lowest priority.
VI. ASUS SCSI Cards
(SCSI ID Numbers)
VI. ASUS PCI SCSI Cards