Digital Equipment SF72 User manual

SF72StorageEnclosure
andSF200StorageArray
Owner’sManual
Order Number EK–SF72S–OM–001
Digital Equipment Corporation

First Edition, January 1991
The information in this document is subject to change without notice and should not
be construed as a commitment by Digital Equipment Corporation. Digital Equipment
Corporation assumes no responsibility for any errors that may appear in this document.
Restricted Rights: Use, duplication, or disclosure by the U. S. Government is subject to
restrictions as set forth in subparagraph (c ) ( 1 ) ( ii ) of the Rights in Technical Data and
Computer Software clause at DFARS 252.227–7013.
Copyright © Digital Equipment Corporation 1991
All Rights Reserved.
Printed in U.S.A.
The postpaid Reader’s Comment Card included in this document requests the user’s
critical evaluation to assist in preparing future documentation.
FCC NOTICE: The equipment described in this manual generates, uses, and may emit
radio frequency energy. The equipment has been type tested and found to comply with
the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC
Rules, which are designed to provide reasonable protection against such radio frequency
interference when operated in a commercial environment. Operation of this equipment in
a residential area may cause interference, in which case the user at his own expense may
be required to take measures to correct the interference.
The following are trademarks of Digital Equipment Corporation:
DEC PDP VMS
DECUS TMSCP XMI
DSSI UNIBUS
KFMSA VAX
MSCP VAX 6000

This document was prepared and published by Educational Services Development and
Publishing, Digital Equipment Corporation.

Contents
About This Manual v
1 Introduction
1.1 SF200 Storage Array Overview . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.2 SF72 Storage Enclosure Overview . . . . . . . . . . . . . . . . . . . . . 1–4
1.3 Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–8
2 SF200 Storage Array Site Preparation
3 SF72 Storage Enclosure Operation
3.1 SF72 Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1.1 Through-Bus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
3.1.2 Split-BusMode ................................. 3–4
3.2 SF72 Front Panel Controls, Labels, and Indicators . . . . . . . . 3–5
3.2.1 SF72OCP ..................................... 3–5
3.2.2 Drive DC Power Switches . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
3.3 SF72 Rear Panel Controls and Indicators . . . . . . . . . . . . . . . 3–12
3.4 Applying Power to the Enclosure . . . . . . . . . . . . . . . . . . . . . . 3–15
3.5 Placing a Disk ISE On-Line . . . . . . . . . . . . . . . . . . . . . . . . . . 3–16
3.6 Taking a Disk ISE Off-Line . . . . . . . . . . . . . . . . . . . . . . . . . . 3–16
iii

iv Contents
4 Troubleshooting
4.1 Verifying a Hardware Problem . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.2 Recovering from a Disk ISE Fault Condition . . . . . . . . . . . . . 4–5
Glossary
Index
Figures
1–1 Front View of the SF200 Storage Array . . . . . . . . . . . . . . . . . 1–2
1–2 SF72 Storage Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
2–1 Single-Host System Configuration Sheet . . . . . . . . . . . . . . . . 2–2
2–2 Dual-Host System Configuration Sheet . . . . . . . . . . . . . . . . . 2–3
3–1 Single-Host Bus Configurations . . . . . . . . . . . . . . . . . . . . . . . 3–2
3–2 Dual-Host Bus Configurations . . . . . . . . . . . . . . . . . . . . . . . . 3–3
3–3 Through-BusMode................................. 3–4
3–4 Split-BusMode ................................... 3–5
3–5 Front View of the SF72 Storage Enclosure . . . . . . . . . . . . . . . 3–6
3–6 SF72Switchpacks ................................. 3–9
3–7 SF72 Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . 3–11
3–8 Rear Panel of the SF72 Storage Enclosure . . . . . . . . . . . . . . . 3–13
4–1 Rear Panel of the SF72 Storage Enclosure . . . . . . . . . . . . . . . 4–2
4–2 Front Panel of the SF72 Storage Enclosure . . . . . . . . . . . . . . 4–3
Tables
1–1 SF200 Storage Array Specifications . . . . . . . . . . . . . . . . . . . . 1–3
1–2 SF72 Storage Enclosure Specifications . . . . . . . . . . . . . . . . . . 1–7
1–3 Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–8
3–1 Summary of SF72 Front Panel Control/Indicator Functions . 3–7
3–2 DSSI ID Switch Settings (Single-Host) . . . . . . . . . . . . . . . . . 3–10
3–3 DSSI ID Switch Settings (Dual-Host) . . . . . . . . . . . . . . . . . . 3–10
3–4 Summary of SF72 Rear Panel Control/Indicator Functions . . 3–12

AboutThisManual
This manual is intended for users of the SF200 storage array and SF72
storage enclosure. This manual will provide users with all the information
they need to operate these devices in a safe and effective manner. The
information in this manual is organized as follows:
•Chapter 1, Introduction, contains a product description and
specifications for the SF200 storage array and SF72 storage enclosure.
•Chapter 2, Storage Array Site Preparation, contains site
preparation information for the SF200 storage array.
•Chapter 3, Storage Enclosure Operation, describes how to start
up the SF72 storage enclosure and how to bring the disk ISE on line
for normal operation.
•Chapter 4, Troubleshooting, contains simple instructions for
troubleshooting the installation of the SF200 storage array and SF72
storage enclosure.
v

1
Introduction
1.1 SF200 Storage Array Overview
The SF200 storage array is a storage rack cabinet designed to hold SF72
storage enclosures and magazine tape subsystems.
The SF200 storage array is intended to be installed in one or both sides
of a host system. All operator control panels (OCPs) project through the
front door of the storage array to allow easy access. The DSSI (Digital
Storage System Interconnect) cables from the host cabinet input/output
(I/O) panel connect to the DSSI I/O panel at the bottom rear of the storage
array. The DSSI I/O panel supports as many as 16 individual DSSI buses.
A fully configured single-host SF200 storage array uses four DSSI buses.
A fully configured dual-host SF200 storage array uses six DSSI buses.
The remaining unused DSSI buses are for future use.
Viewing the SF200 storage array from the front, note that the SF72
storage enclosures and magazine tape subsystems are arranged in the
storage array as follows (Figure 1–1):
NOTE
The position numbers are visible on the right and left chassis side
rails when the front and rear doors of the storage array are open.
• Levels 1, 2, and 4 are reserved for SF72 storage enclosures only.
SF72 storage enclosure upgrades are installed into these levels in the
following order: position 1, 2, 3, 4, 7, and 8.
• Level 3 is reserved for magazine tape subsystems. Magazine tape
subsystem upgrades are installed into this level in the following order:
position 5 then 6.
Specifications for the SF200 storage array are shown in Table 1–1.
1–1

1–2 Introduction
SF200
SHR_X1101_89
1
2
3
4
5
6
0
1
2
3
4
5
6
0
LEVEL 4
LEVEL 3
LEVEL 2
LEVEL 1
Figure 1–1 Front View of the SF200 Storage Array

Introduction 1–3
Table 1–1 SF200 Storage Array Specifications
Characteristic Specification
Number of disk ISEs Minimum: 2, maximum: 24
Formatted storage capacity Minimum: 2, maximum: 24 (in 2 GByte
increments)
Dimensions (nominal) 152.4 cm (60.5 inches) H, 60.96 cm (24.0
inches) W, 76.2 cm (34.0 inches) D
Weight
Minimum configuration1
Maximum configuration2179.62 kg (396 lb) 442.25 kg (975 lb)
Agency compliance FCC, UL, IEC, CSA, and VDE
Temperature +10°C to +40°C (+50°F to +104°F).
Derate 1.8°C for each 1000 meters altitude
(1.0°F for each 1000 feet altitude)
Humidity 10% to 85% @ maximum wet bulb
temperature of +32°C (+90°F) and
minimum dew point of +2°C (+36°F)
Recommended Environmental Limits3
Operating environment
Temperature 18°C to 24°C (64.4°F to 75.2°F) with
an average rate of change of 3°C/hour
maximum and a step change of 3°C or less
Relative humidity 40% to 60% (noncondensing) with a step
change of 10% or less (noncondensing)
Altitude Up to 2400 meters (8000 feet)
Air quality (maximum
particle count) Not to exceed 500,000 particles per cubic
foot of air at a size of 0.5 micron or larger
Air volume (at inlet) 50 cubic feet per minute (0.026 cubic
meters per second)
1The minimum configuration is an SF200–Bx with one SF72–HK.
2The maximum configuration is an SF200–Jx that consists of six SF72–JK enclosures and
two magazine tape subsystems.
3These limits are for optimum equipment performance and reliability.

1–4 Introduction
Table 1–1 (Cont.) SF200 Storage Array Specifications
Characteristic Specification
Recommended Environmental Limits3
Nonoperating environment
Temperature -40°C to +66°C (-40°F to +151°F)
Relative humidity 10% to 80%, noncondensing
Altitude 4900 meters (16,000 feet)
SF200 acoustic noise 6.8 bells
Nominal airflow through enclosure 360 to 520 cubic feet/minute
Input power requirements (47 to 63
Hz normal operation) 6.00 A (per phase) @ 100 to 120 Vac (60
Hz), 3.00 A (per phase) @ 220 to 240 Vac
(50 Hz)
Power requirements during disk
ISE spinup 21.0 A @ 100 to 120 Vac (60 Hz),
10.5 A @ 220 to 240 Vac (50 Hz)
3These limits are for optimum equipment performance and reliability.
1.2 SF72 Storage Enclosure Overview
The SF72 is a storage enclosure designed to be installed into an SF200
storage array or certain system cabinets (Figure 1–2). A single enclosure
holds two or four RF72 disk integrated storage elements (ISEs). Each
disk ISE is independently controlled by the SF72 OCP. The power supply
in the enclosure provides the dc power and cooling for the disk ISEs.

Introduction 1–5
SHR_X1123C_89
Figure 1–2 SF72 Storage Enclosure

1–6 Introduction
The SF72 storage enclosure has the following features:
• The SF72 storage enclosure can operate in one of two modes:
through-bus (described in Section 3.1.1) or split-bus (described in
Section 3.1.2).
– When in through-bus mode, all of the disk ISEs connect to a
single common DSSI bus inside the SF72 enclosure. The DSSI
bus is terminated by connecting to one of the following: a DSSI
terminator (part number 12–31281–01), another SF72 storage
enclosure operating in the split-bus mode (while in single-
host configuration), or another host system (while in dual-host
configuration).
Host configurations are explained later in this manual. Refer to
the KFMSA Module Installation and User Manual for a more
detailed explanation.
– When in split-bus mode, the disk ISEs on the left side of the
enclosure connect to a different DSSI bus than the disk ISEs on
the right side. Also, both DSSI buses terminate inside the SF72
on the transition termination module (TTM) located behind the
OCP. By connecting one SF72 enclosure (operating in through-bus
mode) to an SF72 storage enclosure (operating in split-bus mode),
two DSSI buses with six disk ISEs each are obtained. This mode
of operation is used in single-host configurations only.
• Each RF72 disk ISE has its own set of switches and indicators on the
OCP.
• The enclosure power supply provides operating power to the
subassemblies of the enclosure. The rear panel of the power supply
contains the ac power switch for the SF72.
• Two DSSI connectors are at the top rear of the enclosure. The DSSI
bus runs to each disk ISE in the enclosure.
• The drive dc power switches for the disk ISEs are on the front panel
of the SF72 enclosure. Each switch contains a symbol to indicate its
associated disk ISE and an LED that lights when power is applied to
that disk ISE.
Specifications for the SF72 storage enclosure are shown in Table 1–2.

Introduction 1–7
Table 1–2 SF72 Storage Enclosure Specifications
Characteristic Specification
Number of disk ISE positions 4 (RF72 disk ISEs)
Formatted storage capacity
SF72–HK12 GBytes
SF72–JK24 GBytes
Dimensions (nominal) 26.7 cm (10.5 inches) H, 22.2 cm (8.75
inches) W, 71.1 cm (28.0 inches) D
Weight (nominal)
SF72–HK134.93 kg (72 lb)
SF72–JK241.28 kg (91 lb)
Agency compliance FCC, UL, IEC, CSA, and VDE
Temperature +10°C to +40°C (+50°F to +104°F).
Derate 1.8°C for each 1000 meters altitude
(1.0°F for each 1000 feet altitude)
Humidity 10% to 85% @ maximum wet bulb
temperature of +32°C (+90°F) and
minimum dew point of +2°C (+36°F)
Recommended Environmental Limits3
Operating environment
Temperature 18°C to 24°C (64.4°F to 75.2°F) with
an average rate of change of 3°C/hour
maximum and a step change of 3°C or less
Relative humidity 40% to 60% (noncondensing) with a step
change of 10% or less (noncondensing)
Altitude Up to 2400 meters (8000 feet)
Air quality (maximum
particle count) Not to exceed 500,000 particles per cubic
foot of air at a size of 0.5 micron or larger
Air volume (at inlet) 50 cubic feet per minute (0.026 cubic
meters per second)
1The SF72–HK contains two RF72 disk ISEs.
2The SF72–JK contains four RF72 disk ISEs.
3These limits are for optimum equipment performance and reliability.

1–8 Introduction
Table 1–2 (Cont.) SF72 Storage Enclosure Specifications
Characteristic Specification
Recommended Environmental Limits3
Nonoperating environment
Temperature -40°C to +66°C (-40°F to +151°F)
Relative humidity 10% to 80%, noncondensing
Altitude 4900 meters (16,000 feet)
SF72 enclosure acoustic noise 6.2 bells
Nominal airflow through enclosure 45 to 65 cubic feet/minute
Input power requirements (47 to 63
Hz normal operation) 2.70 A @ 100 to 120 Vac (60 Hz),
1.20 A @ 220 to 240 Vac (50 Hz)
Power requirements during disk
ISE spinup 3.50 A @ 100 to 120 Vac (60 Hz), 3.25 A @ 220 to 240 Vac (50 Hz)
3These limits are for optimum equipment performance and reliability.
1.3 Related Documentation
Table 1–3 lists reference documentation that supplement this manual.
Table 1–3 Related Documentation
Title Order Number
KFMSA Module Installation and User Manual EK–KFMSA–IM
RF31/RF72 Integrated Storage Element User Guide EK–RF72D–UG
TF837 Magazine Tape Subsystem Service Manual EK–TF837–SM

2
SF200StorageArraySitePreparation
The SF200 storage array is intended for installation in a Class A
computer room environment. It must be operated in an environment
that meets the conditions specified in Table 1–1.
Before installing the SF200 storage array, make sure the following
conditions are met:
• The SF200 storage array requires 3-phase ac power. Each phase
draws up to 6 amperes in a fully configured array, and produces 6400
BTUs of heat per hour.
• Adequate space is provided around the storage array for opening the
front and rear doors, accessing cables at the rear of the storage array,
and for adequate airflow.
• The installation site floor can safely bear the weight of the storage
array. (The SF200 storage array with power controller weighs 179.63
kilograms [396 pounds]; a fully configured storage array weighs
442.26 kilograms [975 pounds].)
• The system’s configuration sheet has been correctly filled out and is
up-to-date. Blank system configuration sheets can be found in Figures
2–1 and 2–2.
• An adequate number of KFMSA modules exist in the XMI backplane
of the VAX 6000 series system to support all the disk ISEs in the
SF200 storage array. Refer to the KFMSA Module Installation and
User Guide for more details.
2–1

2–2 SF200 Storage Array Site Preparation
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
KFMSA XMI Node #
Bus 1
DSSI ID # Bus 2
DSSI ID #
Color Code
on Cables
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
KFMSA/DSSI Single-host Configuration Sheet
Color Code
on Cables SHR-X0109-90
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Figure 2–1 Single-Host System Configuration Sheet

SF200 Storage Array Site Preparation 2–3
KFMSA XMI Node #
Bus 1
DSSI ID # Bus 2
DSSI ID #
Color Code
on Cables
KFMSA/DSSI Dual-host Configuration Sheet
Color Code
on Cables
SHR-X0133-90
KFMSA XMI Node #
Bus 1
DSSI ID # Bus 2
DSSI ID #
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Device Type
DSSI ID #
Node Name
ALLO_CLASS
SF200 Box #
System ID
Figure 2–2 Dual-Host System Configuration Sheet

3
SF72StorageEnclosureOperation
This chapter contains the following information:
• A description of the various bus modes and system configurations in
which the SF72 storage enclosure functions
• A description of all front and rear panel controls and indicators
• Instructions on how to power up the SF72 storage enclosure
• Instructions on how to bring the SF72 storage enclosure on- and
off-line
3.1 SF72 Configurations
The SF72 storage enclosure is available with either two or four RF72
disk integrated storage elements (ISEs) installed. The two-ISE variant is
referred to as an SF72–HK, and the four-ISE variant is referred to as an
SF72–JK.
SF72 storage enclosures residing in the SF200 storage array can be
connected to a single host (or system) or to two hosts. When connected
to one system, the configuration is called single-host. When connected to
two or more systems, the configuration is called dual-host. Single-host
configurations support up to 48 GBytes of formatted storage with two
SF200 storage arrays. Dual-host configurations support up to 24 GBytes
of formatted storage in an SF200 storage array with two host systems.
Figures 3–1 and 3–2 show the eight possible bus configurations in an
SF200 storage array cabinet.
3–1

3–2 SF72 Storage Enclosure Operation
SYS
A
108-inch
BC21Q-09
70-inch
SF200 I/O
PORT
Magazine
Subsystem Storage
Enclosure Storage
Enclosure
Tape
SYS
A
SF200 I/O
PORT
Magazine
Subsystem Storage
Enclosure
Tape
SYS
A
SF200 I/O
PORT
Magazine
Subsystem
Tape
T
T
T
D D
D D
D D
SF72 SF72
SF72
SYS
A
SF200 I/O
PORT Storage
Enclosure
D D
SF72
D D
Storage
Enclosure
SF72
DSSI TERMINATOR
12-31281-01
DSSI TERMINATOR
12-31281-01
DSSI TERMINATOR
12-31281-01
SYS
A
SF200 I/O
PORT
D D
D D
Storage
Enclosure
SF72
Split-
Bus
Split-
Bus
108-inch
BC21Q-09
108-inch
BC21Q-09
108-inch
BC21Q-09
108-inch
BC21Q-09
70-inch
70-inch
70-inch
70-inch
42-inch 42-inch
42-inch
42-inch
BC21Q-3F BC21Q-3F
BC21Q-3F
BC21Q-3F
BC21R-5L
BC21R-5L
BC21R-5L
BC21R-5L
BC21R-5L
D D
D D
D D
SHR-X0167-90
Figure 3–1 Single-Host Bus Configurations

SF72 Storage Enclosure Operation 3–3
SYS
A
108-inch
BC21Q-09
70-inch
SF200 I/O
PORT
Magazine
Subsystem Storage
Enclosure
Tape
SYS
A
SF200 I/O
PORT
Magazine
Subsystem
Tape
SYS
A
SF200 I/O
PORT
T
T
D D
SF72
108-inch
BC21Q-09
108-inch
BC21Q-09
70-inch
70-inch
42-inch
BC21Q-3F
BC21R-5L
BC21R-5L
BC21R-5L
D D
SF200 I/O
PORT
70-inch SYS
BC21R-5L
108-inch
BC21Q-09
70-inch
BC21R-5L
SF200 I/O
PORT
SYS
108-inch
BC21Q-09
70-inch
BC21R-5L
SF200 I/O
PORT
SYS
108-inch
BC21Q-09
B
B
B
Storage
Enclosure
SF72
D D
D D
SHR-X0168-90
Figure 3–2 Dual-Host Bus Configurations
Either of these variants operate in one of two bus modes. These modes
are called through-bus and split-bus, and are described in the sections
that follow.
3.1.1 Through-Bus Mode
In through-bus mode, all four disk ISEs in the SF72–JK storage enclosure
operate on or are part of the same DSSI bus. The DSSI bus enters the
enclosure from the rear, at the rightmost DSSI connector. The DSSI
bus is then connected to the left rear disk ISE (facing the front of the
enclosure), then the left front disk ISE, onto the right front disk ISE, then
the right rear disk ISE, and finally out the leftmost (facing rear again)
DSSI connector. At this point, the DSSI bus is either terminated (with
a DSSI terminator, part number 12–31281–01), connected to another
SF72 storage enclosure (operating in split-bus mode in a single-host
configuration), or connected to the array I/O panel and onto another
system (in a dual-host configuration). Refer to Figure 3–3.

3–4 SF72 Storage Enclosure Operation
TAPE
ISE
0
HOST
SYSTEM 1
KFMSA
7
DISK
ISE
1
DISK
ISE
2
DISK
ISE
3
DISK
ISE
4
TTM
DSSI BUS 0
SF72-JK (THROUGH-BUS)
SHR-X0110-90
DSSI
TERMINATOR
Figure 3–3 Through-Bus Mode
The SF72–HK variant operates in through-bus mode, in a similar fashion,
but only the rear two disk ISEs are used. An SF72–UK upgrade kit
consisting of two RF72 disk ISEs can be added to an SF72–HK at any
time.
3.1.2 Split-Bus Mode
In split-bus mode, two disk ISEs in the SF72–JK storage enclosure
operate on or are part of two separate DSSI buses. The DSSI bus enters
the enclosure from the rear, at the leftmost or rightmost DSSI connector.
The DSSI bus for the left half of the enclosure is connected to the left rear
disk ISE (facing the front of the enclosure), then the left front disk ISE,
and finally terminated at the transition termination module (TTM) for the
left half of the enclosure.
The DSSI bus for the right half of the enclosure is connected to the right
rear disk ISE (facing the front of the enclosure), then the right front disk
ISE, and finally terminated at the TTM for the right half of the enclosure.
Refer to Figure 3–4. Split-bus mode is not supported in dual-host
configurations.