Avago Technologies AcceleRAID 170LP - Manual (Page 36)

Installation Process
2-16 AcceleRAID 170LP Installation Guide
Termination - Both Internal and External Devices
Check that the drive channel is properly terminated according to
Figure 2-15. Termination is indicated with a T enclosed in a square.
If the controller board is in the middle of the SCSI bus, it automatically
disables on-board termination. If some SCSI devices on the channel are
connected to the internal connector, and some are connected to the external
connector, the two ends of the SCSI bus farthest from the controller board
must each be terminated.
See Figure 2-15 for an example of a combined internal and external
termination configuration.
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Note
It is better to terminate the ends of the SCSI bus itself
than it is to terminate the end devices on the bus. This
allows hot swap devices to be added or removed from
the SCSI bus without affecting termination.
Figure 2-15. Termination with Internal and External Drive Configuration
Remove or set disk drive termination jumpers to the disabled position (if
needed). Refer to the documentation furnished with your disk drives to
determine if your termination jumpers need to be adjusted.