Qualstar XLS Series Installation Manual page 128

9.2 Connecting the Cables
9.2.1 Removing the EMI Shield
The EMI shield, shown in
from the connectors on the library and must be removed before you can access the HBA
ports to attach the cables.
EMI shield
Figure 9-1 Location of the EMI shield (cables shown attached)
To remove the EMI shield, follow these steps:
1. Loosen the two thumb screws that secure the EMI shield to the system controller.
2. Set the shield and screws aside.
9.2.2 Connecting the Cables
You can connect and control the medium changer and the tape drives in a number of
ways, using parallel SCSI buses, Fibre Channel networks, or a combination of both. The
communication protocol is determined by the type of host bus adapter card (HBA)
installed in the system controller. The XLS supports up to four dual-port SCSI or Fibre
Channel HBAs.
Important:
If the XLS has multiple SCSI and Fibre Channel HBAs installed, the SCSI HBAs must be
installed in the left slot(s) first as viewed from the rear of the library (next to the CAN bus
controller card).The Fibre Channel HBAs must be installed in the slots to the right of the
installed SCSI HBAs. This is due to the process in which the system controller
9-2
Figure 9-1, reduces potential electromagnetic interference
The HBAs control the XLS's medium changer interface
only; they do not control or communicate with the tape
drives.
501601 Rev. 07-01-19