5190/5194 Modular Tape Subsystem Manual

Introduction to the Modular Tape Subsystem
5190/5194 Modular Tape Subsystem Manual—426878-002
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SCSI Extender for Fiber-Optic Cable
SCSI Extender for Fiber-Optic Cable
For cable lengths from 500 meters to 2 kilometers, contact your service provider. If
you want a third party to install the cable, use the 2-kilometer Cable Specification listed
in Appendix A, Part Numbers.
5190/5194 NonStop Himalaya S-Series
Interface Components
The modular tape drive CRU communicates with a NonStop Himalaya S-series server
through one of the following:
•
A SCSI ServerNet addressable controller (SAC) in a processor multifunction (PMF)
CRU or I/O multifunction (IOMF) CRU, using SCSI cable
•
A 6761 F-PIC installed in a 6760 ServerNet/DA, using fiber-optic cable
•
A 6762 S-PIC installed in a 6760 ServerNet/DA, using SCSI cable
Table 1-5 compares features and requirements. NonStop Himalaya S-series cables
are not interchangeable with NonStop Himalaya K-series cables. Their part numbers
are listed in Appendix A, Part Numbers.
Caution. Avoid daisy-chaining tape drives on NonStop Himalaya S-series servers, because
tape performance is limited by competing server tasks like disk I/O activity.
Table 1-5. Interface Component Comparison for NonStop Himalaya S-Series
Servers
Interface
Component
Cable
Type
Cable
Length
Drives
Supported Notes
SCSI SAC in
PMF CRU or
IOMF CRU
SCSI 3
meters
(10 feet)
to 23
meters
(75 feet)
One or two The PMF CRU or IOMF CRU manages
tape operations on the modular tape
subsystem.
The SCSI SAC is part of the PMF CRU
or IOMF CRU.
You can use TSM to check the adapter
hardware.
6761 F-PIC in
6760 adapter
fiber-
optic
2 to 500
meters
One or two You can use TSM to check the adapter
hardware.
6762 S-PIC in
6760 adapter
SCSI 3 to 23
meters
One or two You can use TSM to check the adapter
hardware.