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143715-F
NSM /DISCx000 Version 2.0 QickInstallatinsGuide
Rev. C
19
SCSI MODE
The SCSI mode has to be selected if the Optical Library should be controlled
over the SCSI bus. In the SCSI mode the ID switch is used to select the
SCSI ID of the Optical Library robotic.
If SCSI mode is selected, the robotic of the Optical Library allocates a SCSI ID
on the SCSI bus.
The ID range for the robotic SCSI ID is 0 to 7, default setting is 0.
The SCSI mode must be selected if the Optical Library is controlled via the
SCSI
bus. The ID switch is used to select the robotics SCSI ID. The range for SCSI
IDs is 00 to 07.
SCSI CABLE REQUIREMENTS
The quality of the SCSI cables affects the reliability and usage of a SCSI
system. The SCSI - III standard defines the characteristics of good cables.
They are 100 % shielded round cables that contain 34 twisted pairs of wires.
Each pair should have a characteristic impedance between 90 and 110 ohms.
The wire gauge should be 26 or 28. Most SCSI cables do not meet these
requirements.
Connector plating, shielding, grounding, strain relief, and the way the wires are
routed in the seath all affect the quality of your connection. It is advisable to
use only high quality SCSI cables.
Only best shielded 34 pair high quality AWG33 universal LVD SCSI cables
that meet the European Directive 2002/EC, Issue 13.02.2003, for RoHS
compliance shall be used to connect the DISCx000 robotics and drives!
The max. cable lengh of the external library – host interconnecting LVD
SCSI cable may be 9 meters.
The DISC libraries do have for every internal LVD SCSI bus 1 screw able
female 68pin HD connector at the back panel of the machine.
Every library (Optical Library) SCSI bus requires its own HBA channel
!
No other external or server-internal devices may be connected to the
same bus that is connected to the Optical Library robotic or drives!
