Qualstar XLS Series Installation Manual page 119

Example 3: Mixed SCSI and Fibre Channel Connections
Figure 8-7
and two HBAs. The XLS has been partitioned into four logical libraries, as follows:
• Logical Library 1 contains one LTO3 SCSI tape drive. The host computer
communicates with the tape drive and the medium changer over a single SCSI
bus, which is terminated by the upper port of HBA A and by the host computer.
• Logical Library 2 contains one LTO4 SCSI tape drive. The host computer
communicates with the tape drive and the medium changer over two seperate
SCSI buses. The LTO4 SCSI tape drive carrier is self terinating and the other
end is terminated by the host computer. The lower port of HBA A in the system
controller (which provides active termination) and the other end is terminated by
the host computer. The unused drive slots contain drive filler assemblies.
• Logical Library 3 contains four Fibre Channel tape drives in a single drive bay.
The host computer controls the medium changer using the upper port of HBA B.
The tape drives and the HBA port are cabled to a Fibre Channel switch installed
in the equipment rack.
• Logical Library 4 contains four Fibre Channel tape drives in a single drive bay.
The host computer controls the medium changer using the lower port of HBA B.
The tape drives and the HBA port are cabled to a Fibre Channel switch installed
in the equipment rack.
XLS Library Installation Manual
shows the cabling scheme for an example library that contains ten tape drives
8
Installing the Tape Drive Assemblies
8-7