Quantum Audio Tape Drive Scalar 50 - Manual (Page 21)

Quantum Scalar 50 Tape Drive Installation Instructions
Document 81-81769-01 B01
September 2007
Fibre Channel Connectivity Troubleshooting 21
e If you are still unable to view the Fibre Channel devices, launch the
SANsurfer SANblade manager and click Connect. Accept the default
“localhost” entry.
The SANblade manager displays (see
figure 22 ).
Figure 22 SANblade
Manager
The SANblade manager should display all connected Fibre Channel
devices. If the library and tape drives do NOT display, check the
cabling and connection status.
SCSI ID Assignment
with Native Fibre
Channel Tape Drives
0
With native Fibre Channel tape drives, each tape drive is it’s own Fibre
Channel target with a dedicated WWN and on LUN 0. The host (including
the laptop using MAGMA box) will pick up the devices and assign local SCSI
IDs in the order that the SAN devices are discovered. This will in almost
every case NOT match the order of the devices as they are installed in the
library. This is not a problem from the customer point of view, as long as
drive serialization is enabled on the library and serialization is supported by
the customers ISV application. This will allow the ISV application to put the
drives in the correct order within the application.
In some rare cases it may be necessary to re-map the local SCSI ID
assignments so that the library changer is at SCSI ID 0 and the drive SCSI ID
assignments follow in order. The important thing to remember is that the
order of the SCSI IDs on your system will probably not match the order of the
drives in the library. Make sure to check the SCSI ID that is assigned to the
WWN of the drive you want to communicate with or you may be
communicating to the wrong drive