HP 27115A User manual

HP 3000 Series 900 Computer Systems
HP 27115A
Fiber-Optic Link
Installation Manual
FliDW HEWLETT
.:~ PACKARD
HP Part Number: 27115-90001
Printed in U.S.A.
April 1990
Edition 2
E0490

Notice
History
2
Hewlett-Packard Company makes no warranty of any kind with regard to this
material, including, but not limited to, the implied warranties of merchantability
and fitness for a particular purpose. Hewlett-Packard shall not be liable for
errors contained herein or for incidental or consequential damages in
connection with the furnishing, performance, or use of this material.
©Hewlett-Packard Company, 1990. All rights reserved.
This document contains proprietary information, which is protected by
copyright. No part of this document may be photocopied, reproduced, or
translated into another language without the prior written consent of
Hewlett-Packard. The information contained in this document is subject to
change without notice.
Hewlett-Packard Company, Roseville Networks Division, Roseville, CA 95678
Edition 1 .. April 1988
Edition 2 .. April 1990

Contents
1 General Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Product Description ............................... 1-1
Features ...................................... 1-2
Equipment Supplied ............................... 1-2
Options ..................................... 1-3
Cables, Test Equipment, and Tools ...................... 1-3
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Tools ...................................... 1-4
Installation Design .......... . . . . . . . . . . . . . . . . . . : . . . 1-5
HP-FL Subsystem Considerations ....................... 1-6
Number of Disk Drives ............................ 1-6
CIO Slots .................................... 1-6
Channel Contention ................ . . . . . . . . . . . 1-6
Identification ..................... . . . . . . 1-6
Specifications . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 1-7
2 Installation and Configuration
HP-FL Installation ................................ 2-1
Configure the Link into the OperatingSystem ............... 2-2
Verify the Position of Jumper J2 ........................ 2-2
Install the HP - FL PCA ............................. 2-3
Connect the Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Cables from a Non-HP Source ....................... 2-4
Installing the PBus Terminators ....................... 2-5
Bus Terminators ............................... 2-5
Attach and Adjust the Strain ReliefFerrule . . . . . . . . . . . . . . . . . . 2-7
Complete the Installation ........................ 2-8
Verify the Link Operation . . . . . . . . . . . . . . . . . . . 2-9
PCA Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
PCA Self-Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
PCA LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
3

4
3 Troubleshooting and Diagnostics
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Self-Test Failure and Status LEDs
.................... ... 3-2
Self-Test Failure
LED ............................ 3-3
Operational Status LEDs
.......................... 3-3
Summary: Interpreting the
LEDs . . . . . . . . . . . . . . . . . . . . . . 3-3
Configuration LED: C
.......................... 3-4
Signal LED: S ............................... 3-4
Remote LED: R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Passed Self-Test LED: P . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Activity LED: A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
HP-FL Diagnostic Software (HPFLDIAG) .................. 3-5
HPFLDIAG Capabilities . . . . . . . . . . . . . . . . . . . . ....... 3-5
Running HPFLDIAG
......................... ... 3-5
Example
.................................. 3-6
Summary ofDiagnostic Sections . . . . . . . . . . . . . . . . . . . . . . . 3-7
Section 2. CLEAR ............................ 3-7
Section 3. IDENTIFY .......................... 3-7
Section 4. LOOPBACK ......................... 3-8
Section 6. STATUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Section 10. VERIFICATION TROUBLE TREE . . . . . . . . ... 3-8
Section 11. DIAGNOSTIC TROUBLE TREE ......... ... 3-8
Section 12. ON-SITE TROUBLE TREE ............... 3-9
General Troubleshooting
............................ 3-10
PCA Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Cable Fault Isolation ............................. 3-11
Method
1: By Inference ......................... 3-11
Method
2: Loopback Test on Each Fiber ofthe Duplex Cable .... 3-12
Method
3: Use Fiber-Optic Cable Test Equipment .......... 3-13
Remote Device Fault Isolation
....................... 3-13
Fault Not Found
................................ 3-14
4 Replaceable Parts
Field Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Removal and Replacement ........................... 4-2
PCA Removal ................................. 4-2
Replacement
................................. 4-3
PCA ..................................... 4-3
HP-FL Cable ................................ 4-3
Firmware PROMs ............................. 4-4
A Cable Installation
Cable Plan ................................... A-I
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-I
Index

1
General Information
Introduction
Product Description
This manual contains installation and troubleshooting information for the
HP 27115A Fiber-Optic Link (HP-FL) device adapter.
The HP 27115A HP-FL device adapter provides the computer system with a high
speed, serial connection to peripheral devices over a fiber-optic data link.
Device specific data are converted to a format compatible with the CIO bus
(cm), and then passed to the host computer. The channel adapter controls the
flow of traffic between the cm and the memory/processor bus. See figure 1-1.
Channel
Adapter
Figure 1-1. HP-FL Device Adapter in an HP 3000 Computer System
A duplex fiber-optic cable provided with the HP-FL connects it to supported
peripherals. The cable consists oftwo graded index optical fibers with cladding
and a polyurethane outerjacket, with four 90s-type SMA optical connectors.
Peripherals that may be connected to the HP 27115A HP-FL include:
• HP 7936FL, 307-Mbyte disk drive with HP-FL controller
• HP 7937FL, 571-Mbyte disk drive with HP-FL controller
• HP C2201A, 670-Mbyte disk drive with HP-FL controller
• HP C2204A, 134O-Mbyte disk drive with HP-FL controller
Generallnformation 1-1

Features
Disk clusters and
I/O slotefficiency
Transfer rates
Omoading the host
CPU
Optical fiber cable
Table 1-1 summarizes key features of this product.
Table 1-1. Summary of HP 27115A Features
HP-FL can connect the host with up to 8 disk drives in a cluster. This can result in a large
number
of disk drives attached to your system while lowering the number of I/O slots
required. The drives use a "daisy-chain" connection called the "PBus" to move data to the
fiber link.
The HP-FL protocol can transfer up to 5 Mbytes per second. The overhead imposed by the
HP-FL device adapter is less than 1 ms. (Additional overhead accrues from the software,
the channel, and the disk controller.)
The HP-FL on-board microprocessor controls the HP-FL protocol. It manages PCA
operations and data transfers with minimal host intervention. It also conducts a hardware
self-test,
and displays results of internal and external link status checks by means of6 LEOs.
Fiber-optic cable is thin, lightweight and flexible. It is not susceptible to electronic or
magnetic noise and provides electrical isolation The cable may be up to 500 meters long,
allowing greater flexibility in locating disk drives. (See "Cables, Test Equipment, and
Tools", to order a cable other than 30 m long.)
Equipment Supplied The following items are provided with the standard HP 27115A product:
• 27115-60001 HP-FL device adapter PCA
• 1005-0078 30 m, duplex fiber-optic cable with 90s-type SMA connectors
• 5061-3151 PBus terminator (quantity = 2)
• 27115-90001 HP 27115A Fiber-Optic Link Installation Manual
Figure 1-2. HP 27115A Fiber Optic Link
1-2 Generallnformation

Options Depending on the options below, the above items may have been modified:
Cables, Test
Equipment and
Tools
Note
#001 Deletes the standard 3O-meter HP-FL cable. Cables in special lengths are
available separatelyfrom Hewlett-Packard.
#002 Adds a 3O-cm, single-fiber loopback cable, part number HFBR-3020.
If any item is missing or incorrect, or you would like to order additional
hardware, contact your nearest HP Sales and Support Office.
To order a special length cable from Hewlett-Packard, contact the HP Sales and
Support Office. Order part number HFBR-AWOnx, withxa replaced by the
length (in meters) you want the cable to be. For example, HFBR-A WQ075 is
the part number for a 75-meter cable. The following cable lengths (in meters)
are available:
001
002
005
010
015
020
025
030
035
040
045
050
075
100
125
150
175
200
250
300
350
400
450
500
Installation of the fiber-optic cable may require additional equipment to pull
and protect the cable. Refer to the Fiber-Optic Cable Installation Guide
(5954-8446), provided with the cable.
For cable specifications, see appendix A or the Fiber-Optic Cable Installation
Guide.
General Information 1-3

Test Equipment Test equipment may be required to test the fiber-optic cable, both before and
after installation. This equipment must be able to connect with the 90S-type SMA
connectors on the cable ends. The following equipment can be used:
• Optical power meter, for example, Photodyne ModeluXE*
• Optical power source, for example, Photodyne ModeI8XE-B*
• 905/906 series SMA adapter, for example, Photodyne Model 2003*
Refer to your supplier's catalog for various options and accessories available.
A
single-fiber loopback cable allows convenient troubleshooting of HP-FL
subsystem components. Option #002 to the product provides a short,
single-fiber cable for this
purpose (this cable is available as part number
HFBR-3020). Alternatively, one of the fibers on a duplex cable can be used for
loopback testing
if both ends of the fiber are available for connection to the HP
27115ApCA.
Tools Installation or routing the cable may require assembly, disassembly, or
adjustment of a strain-reliefferrule on the fiber-optic cable. Two screws secure
the ferrule to the cable, and will require the use of a O-point Pozidriv or Phillips
screwdriver. See figure 2-5 and the accompanying text for details about the
strain-reliefferrule.
Note The decision to repair a fiber-optic cable depends on the availability and cost of
a replacement cable. The repair will take a trained technician about two hours
with the required tools and parts. Test the cable after the repair. See chapter 3
for details.
1-4 General Information
A fiber-optic tool kit (Amphenol part number 927-100-S9OSt) is available that has
tools
and minor parts for making these repairs. (Amphenol also offers a
replenishment kit,
part number 927-100-2039t, with replacements for those parts
used in the repair process.) You must also have two, 90S-type SMA connectors
(HP part number HFBR-400(1) to make the repair
* Available from:
Photodyne Inc.
3760 Calle
Tecate
Camarillo, California, U.S.A. 93010
t Available from:
Amphenol Fiber Optics
1938C University Lane
Lisle, Illinois, U.S.A. 60532

Installation Design
Note
Caution
This section describes supported computer-to-disk connections.
Connecting two
or more computers to a single disk cluster is not supported.
Although the hardware connection is possible, software for multiple computer
disk sharing is not available.
Figure 1-3 shows two HP-FL device adapters and disk clusters.
The number of
HP-FL device adapters that can be installed depends on the particular computer
system, number of HP CIO channels, and available I/O card slots. Consult your
computer system installation and configuration manuals. If your installation
requires more than one HP-FL link, be sure to divide them evenly among the
available CIO buses.
No CIO bus may have more than two HP-FL PCAS
More than two HP-FL device
adapters will cause CIO channel contention and may overtax the power supply
on your computer or extender. See table 1-2 for the power requirements for the
HP-FLPCA.
Notice that, with a single drive attached to an HP-FL device adapter, two PBus
terminators are installed on that driv~. Where there are multiple drives, one
terminator attaches to the drive where the fiber cable connects. A second
terminator attaches
to the last drive in the chain, and the PBus cables connect
the controller (in the first drive) in series to the other drives. Your disk drive
installation manual will have detailed instructions for installing the PBus
terminators.
PBus
terminL
Disk
Driv
Figure 1-3. Connection to Disk Clusters
Generallnformation
1-5

HP-FL Subsystem
Considerations
Number of Disk Drives
CIO Slots
Note
Channel Contention
Identification
1-6 Generallnformation
There are various subsystem considerations associated with installing the HP-FL
PCA that will affect system operation and performance.
The HP-FL software can control as many as eight disk drives through a single
HP-FL PCA. However, your computer or installation may limit this number to six
or fewer. See your system manuals for details.
The total number of CIO slots available for general device adapters depends on
the computer,
and whether it supports additional CIB channel adapters or
extenders. Depending on the system, each channel adapter supports from 5 to
14
CIO slots. However, you must install the HP-FL PCA in one of the eight
lowest-numbered slots in any given
CIB.
Install the HP-FL PCA in one of the slots numbered from 0 to 7 in any CIO bus.
As noted above, some systems have more than one CIB. With a host with
multiple
CIO buses and more than one HP-FL PCA, divide the PCAS among the
CIO buses to minimize channel contention problems. For instance, with two
HP-FL PCAs and two CIO buses, put one PCA on each bus.
The HP-FL PCA is identified on two labels affixed to the card. For example, the
labels might look like this:
27115-66666 21
2823A56789 DIV
A-4321 52A654321 MADE IN U.S.A.
52
Figure 1-4. Example peA Identification Stickers
Do not remove the labels. Record this information in a convenient place, such
as your system logbook, for use when discussing
the device adapter with HP
factory and support personnel.

Specifications
Note
Total the power requirement of all the adapters in the backplane and compare
the sum to the rated output of the power supply to determine whether you can
add the HP-FL to your computer system. The power figures are useful for
determining the size of the required cooling system.
Table 1-2. Voltage Requirements and Power Dissipation
Voltage
Current
Power
(±S%)
typical 20 worst
case
+SVdc
2.920 A 3.190 A 3.350 A typical
14.9W
+12 V dc 0.019 A 0.029 A 0.031 A
20 16.5W
-12 V dc 0.015 A 0.017 A 0.017 A worst case
18.2W
When using multiple HP-FL device adapters, the total number of disk drives
supported on a system is system dependent. Consult your system specifications.
Table 1-3. HP-FL Environmental Limits
Operating Environment Storage Environment
Temperature 0°C-5SOC
-40°C-70°C
Relative 95% @40°C (noncondensing) 90% @65°C (noncondensing)
humidity
Altitude 4.6 km (15,000 feet) 15.2 km (50,000 feet)
Table 1-4. HP-FL Optical Specifications
Transmitter Receiver
Connector Compatible with 90s-type Compatible with 90s-type
SMA connectors SMA connectors
Wavelength
820nm 820nm
Raw Bit Speed 80 Mbit/s 80 Mbit/s
Optical Power
(using 100/140 I'm cable -21 dBm (minimum) -27 dBm (minimum)
with NA = 0.30)
-9 dBm (maximum) -9 dBm (maximum)
Generallnformation 1-7

2
Installation and Configuration
HP-FL Installation
Caution
Installation of the HP 27115A Hp·FL device adapter takes five steps:
1. Configure the link into the operating system.
2. Verify the position of jumper J2.
3. Install
the Hp·FL peA.
4. Connect the fiber-optic cable.
5. Verify
the link operation.
The HP 27115A Fiber-Optic Link (HP.FL) printed circuit assembly (peA) is
susceptible to damage by electrostatic discharge (ESD). If possible, work in a
static-free work area.
• Handle the peA byits edges or extractor levers
• Avoid working on a carpet
• Reduce unnecessary movements.
These precautions will lessen the chances of ESD damage.
ESD can damage any electronic assembly. Failure to follow anti-ESD precautions
can void your warranty.
If you do not have a static-free work area, we recommend a workstation kit, like
the one provided as part number 9300-1155. It has a groundingwrist strap, a
conductive work
mat and other items to safely shunt any charge to ground.
Instructions for its use
come with the kit.
Installation and Configuration 2-1

Configure the Link
into the Operating
System
Verify the Position
of Jumper J2
To configure the HP-FL PCA and peripheral drives into the operating system,
refer to your system administrator's manuals and the disk drive manuals. You
may configure the operating system either before
or after installation ofthe
hardware.
The HP-FL PCA has a jumper labeled J2. The "M" position is undefined. For
operation, the jumper must
be in the "L" position, as shown in figure 2-1.
o
DD
Figure 2·1. Jumper J2 Location and Position
2·2 Installation and Configuration

Install the HP-FL
peA
WARNING
Slot selection depends on howyour system is configured. Review the section
titled "HP-FL Subsystem Considerations" in chapter 1. Your system
administrator's manual will identify those slots where the HP-FL PCA
is allowed.
Switch off the computer power when installing or removing a peA.
Before switching off the power, carefully follow the shutdown
procedures explained in your system manuals.
Failure to follow the correct procedure may result in electrical shock
and in data loss or corruption.
The HP-FL PCA must be installed into the CIO card cage of your computer or
extender unit. Because this operation is system dependent, refer to the system
hardware manuals supplied with your computer for details. You will:
1. Shut down the operating system.
2. Switch offthe computer power.
3.
Open the CIO card cage.
4. Insert the PCA into a CIO card cage slot. This step includes orienting
the
peA correctly, and seating the PCA connector onto the backplane
connector in the CIO bus. However,
do not insert the PCA completely
into the backplane connector. Leave about 5 cm (2 in.) protruding to
allow installation
of the fiber-optic cable.
Installation and Configuration 2-3

Connect the
Fiber-Optic Cable Remove the protective caps on each connector
of the cable and the PCA's ports.
Attach the cable connector with the white sleeve to the light gray transmit port
on the HP-FL PCA and the other connector to the darkergray receive port. This
may
be easier with the PCA slightly extended from the CIO card cage. See figures
2-2 and 2-3.
Caution
At the other end of the cable, attach the white-sleeved connector to the transmit
port on the controlling drive and the sleeveless connector
to the drive receive
port.
When attaching the cable to the PCA, be careful not to overtighten the
connectors. Use caution to avoid cross-threading the plastic port barrel. Make
the connections by hand to avoid excessive torque.
Do not use tools as they may
damage the connectors.
The optical transmit port on the PCA must connect to the drive's receive port,
and the PCA'S receive port must connect to the drive's transmit port.
The
standard cable is marked to make this easier (see figure 2-2).
White-sleeved connector to
PCA transmit port
==
Sleeveless connector
to PCA receive port
Sleeveless connector to
disk drive receive port
White-sleeved connector to
disk drive transmit port
Figure 2-2. Identifying the Transmit and Receive Cable Connectors
If you connect the transmit ports to each other and the receive ports to each
other, no damage will result, but the linkwill not work. (See the "Verify Link
Operation" section later in this chapter. The red S and R LEDs will light.)
Cables from a Non-HP Duplex fiber cables from other manufacturers will have a different scheme to
Source help you identify a single fiber at each end of the cable. For example, one fiber
may have a stripe along its length, while the other fiber does not. Connect the
fiber with the stripe to the transmit port (light gray)
and the unstriped connector
to the receive port (darkgray) on the HP-FL PCA.
At the disk drive end of the
cable, connect the striped fiber to the disk drive's receive port and the unstriped
fiber to the disk drive's transmit port.
2-4 Installation and Configuration

Optical receive port
D
D
--------.. :::::::: ~ ;
Optical transmit port
FIbcr-optic cable,
fiber with white sleeve
Figure 2-3. Fiber-Optic Cable Connection
Installing the PBus Installing the PBus terminators has only two rules:
Terminators
Note
1. Every PBus socket must have either a terminator or a PBus cable
connector attached.
2. The terminators must be reversed with respect to each other.
Since different disk drives have different socket arrangements, there are two
terminator installation-indicator LEDs on the disk drive control boards near the
PBus cable/terminator sockets. All of the indicators on the PBus must be off. If
any is on, remove one of the terminators, invert it and re-install it. Figure 2-4
shows the disk-drive controller board for a single disk-drive installation and the
first and last controller boards for a multiple disk-drive installation.
Be sure the disk-drive power is on when you verify the LEDS. If you install the
PBus terminators wrong, the HP-FL link will not work. See the disk drive
manuals for more detail.
The PBus terminators for a multiple-drive
installation.
single-drive installation.
These LEDs must
be off. If either is
on, remove one
terminator and
invert it.
If any of these LEDs is on, remove
one terminator and invert it.
Figure 2-4. The Disk Drive Controllers Board Terminator LEOs
Installation and Configuration 2-5

Attach and Adjust
the Strain Relief
Ferrule
Note
Once the PCA, with the attached cable, is in the CIO card cage, you will need to
install a strain-reliefferrule (unless it is already installed on the cable). When
properly connected to the CIO grounding bus (part
of the CIO card cage), it
provides strain relief and guides the fiber-optic cable out ofthe card cage. The
computer power should
be switched offfor this procedure. Figure 2-5 illustrates
installing a strain reliefferrule.
If the strain-reliefferrule is pre-assembled on the cable, you may still need to
adjust it for proper distance from the cable end. Reverse the ferrule in the
grounding bus (as in step 1) and proceed to step 2 below.
Note the twist in
the fiber-optic
cable.
The compression
block in correct
orientation
1
~~GJ ---- /
Tighten~crews ~J /
after adjusting the cable length.
Strain-relief
ferrule in its
position, with
the cable
straight.
Grounding
bus
Figure 2-5. Fiber-Optic Cable Strain-Relief Ferrule
The fiber-
2-6 Installation and Configuration

Caution
Complete the
Installation
To install the strain-reliefferrule:
1. Place the ferrule into the "groundingbus" backwards-that is, with its
open side exposed as shown in figure 2-5. As the figure illustrates, lay
the fiber-optic cable into the ferrule with a half twist. (At the end ofthe
installation process, you will take the twist out again.
The cable will
then
be straight when the ferrule is in its normal position.) Be sure
there
is no tension on the peA's optical ports.
2. As shown in the illustration, insert the compression block ofthe ferrule
into its channel. Tighten the two screws enough to hold the cable in
place for the next step.
If the ferrule was pre-assembled on the cable,
loosen the screws enough to slide the cable
up or down for adjustment.
The compression block must
be inserted with the notched side toward the cable,
as in the figure.
If it goes in backwards, it can damage the cable.
3. Leave 0.5 cm (14 in.) "play" as slack in the cable to prevent damage to
the optical ports. Securely fasten the compression block to the ferrule
body. The cable should no longer slip in the ferrule.
4. Pull the peA slightly out (5 cm or 2 in.) from the card cage to provide
working slack in the cable. Remove the ferrule from the grounding bus.
Turn it around so the cable
is straight and re-insert it into the
grounding bus. Reseat the peA.
With the HP-FL peA fully inserted, both it and the strain-reliefferrule are now
installed.
Installation and Configuration 2-7

Verify the Link
Operation
WARNING
You should verify operation of the PCA and the HP-FL subsystem before
transmitting any
data across the link.
To verify operation of the HP-FL link, observe the results of the PCA self-test on
the six
LEOs on the front of the PCA. Figure 2-6 shows their locations.
Operation of the computer with the CIO card cage open exposes
personnel to hazardous electrical power.
For some systems, a safety interlock switches off the computer power
when the card cage
is open. Any attempt to defeat the interlock may
also expose personnel to mechanical dangers.
Caution The HP-FL PCA does not comply with mandatory electromagnetic radiation and
interference
(EMI and RFI) regulations when the card cage is open.
PCA Self-Test The PCA self-test runs whenever the computer power is switched on or the
computer is reset.
If you are familiar with the operating system, you can reset
the
PCA programmatically. Some sections of the diagnostic program HPFLOIAG
also reset the PCA. (See chapter 3, Troubleshooting andDiagnostics.)
PCA Self-Test Results
Your system may display the PCA self-test results in any of these ways:
2-8 Installation and Configuration
• The System Status Display identifies any non-operational PCA in the
host backplane. During the
SPU self-test, general I/O self-tests also run.
The host reports this information through the system status display (on
a hexadecimal readout, on the system console,
or by the system status
LEOS). Refer to the hardware support manuals for your computer.
• HPFLDIAG displays its results on the system console or a user terminal.
• Most PCAs (including the HP-FL PCA) have LEOs that return the results
of the PCA self-test. The LEDs on the HP-FL PCA are shown below.