To properly terminate a SCSI chain, you should place a terminator at the last device on the SCSI bus. This ensures that signals are correctly reflected and prevents data transmission errors. Depending on the SCSI type (like SCSI-1 or SCSI-2), the terminator can be a physical resistor pack or built into the device itself. Always check the SCSI specification for the specific requirements of your setup.
The final SCSI device in the chain of devices must be terminated. If you have only one device and it's attached to a SCSI port, you must terminate that device. If you have two or more SCSI devices that are linked together and to a shared SCSI Port ie: SCSI Port, Device #1, Device #2, etc, then the final device in the 'chain' must be terminated to allow for proper recognition. The SCSI Port also requires a terminator as well.
SCSI chain
In a plain SCSI (Small Computer System Interface) chain, up to 8 devices can be connected, including the SCSI host adapter. This means there are 7 additional devices that can be connected to the chain. SCSI IDs range from 0 to 7, with each device needing a unique ID for proper communication.
Identification
terminanting resistor
SCSI uses a parellel communication chain and SAS uses serial Point to Point communication
Simply terminate each of the devices. Terminate the hard disk as well as the external cr-rom.
SCSI
SCSI-2
DB25 SCSI connector50 pin SCSI connector
When assigning IDs to SCSI peripherals, ID 0 should generally not be used for devices other than the SCSI host controller itself. This is because ID 0 is typically reserved for the SCSI initiator, which is responsible for sending commands to other devices on the bus. Using ID 0 for other peripherals can lead to conflicts and communication issues within the SCSI chain. It's best to allocate IDs 1 through 6 or 7 for other devices, depending on the SCSI standard in use.
SCSI 3