Avago Technologies AcceleRAID 150 - Manual (Page 26)

Controller Installation (Standard)
2-12 AcceleRAID 150 Installation Guide
9. Termination – Both Internal and External Devices (Standard)
Check that the drive channel is properly terminated according to
drawing below. If the controller 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 must each be terminated; this allows hot
swap capability.
See Figure 2-11 for an example of a combined internal and external
drive configuration. Notice that they are on the same channel.
☛
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.
☛
Note
The only devices controlled by the RAID
configuration are the ones physically
connected to the AcceleRAID 150 card.
Figure 2-11. Termination with Internal and External Drive Configuration
T
T
Auto Termination
Disabled
Internal – External
Drive Configuration