DEC RAID Array 3000 storage subsystem User manual

RAID Array 3000 Storage
Subsystem
Hardware User’s Guide
EK–SMCPO–UG. A01
Digital Equipment Corporation
Maynard, Massachusetts

First Edition, January 1998
The disclosure of this information does not grant to the user a license under any patents,
pending patents, trademarks, or copyrights or other rights of Digital Equipment
Corporation, or of any third party.
This software is proprietary to and embodies the confidential technology of Digital
Equipment Corporation.
Possession, use or copying of the software described in this publication is authorized
only pursuant to a valid written license from Digital Equipment Corporation or an
authorized sublicensor.
Digital Equipment Corporation makes no representation that the use of its products in
the manner described in this publication will not infringe on existing or future patent
rights, nor do the descriptions contained in this publication imply the granting of
licenses to make, use, or sell equipment or software in accordance with the description.
The following are trademarks of Digital Equipment Corporation:
DEC, RAID Array 3000, StorageWorks, and the Digital Logo.
UNIX is a registered trademark in the United States and other countries, licensed
exclusively through X/Opin Company, Ltd..
All other trademarks and registered trademarks are the property of their respective
owners.
©Digital Equipment Corporation 1997. All Rights Reserved
Printed in USA

EK–SMCPO–UG. A01 iii
Contents
Revision Record ..............................................................................................ix
About This Guide ...........................................................................................xi
1 Product Overview
1.1 Product Description...............................................................................1–1
1.2 Pedestal Features...................................................................................1–4
1.3 Pedestal Cabinet....................................................................................1–4
1.4 Pedestal Components ............................................................................1–6
1.4.1 StorageWorks Building Blocks (SBBs)..............................................1–6
1.4.2 RAID Array Controller......................................................................1–6
1.4.3 Pedestal Power Supplies ....................................................................1–7
1.4.4 Uninterruptable Power Supply ...........................................................1–7
1.4.5 Environmental Monitor Unit (EMU)..................................................1–8
1.4.6 UltraSCSI Bus ...................................................................................1–9
1.5 Specifications......................................................................................1–12
2 RAID Array Controller
2.1 Controller Overview..............................................................................2–1
2.2 Controller Features................................................................................2–2
2.3 Controller Reset and LED Indicators.....................................................2–6
2.4 Flexible RAID Set Configuration..........................................................2–7
2.5 Performance Enhancements ..................................................................2–8
2.5.1 Custom Components..........................................................................2–8
2.5.2 Efficient Write and Read Algorithms.................................................2–8
2.6 RAID Levels Supported......................................................................2–10
2.6.1 RAID 0............................................................................................2–11
2.6.2 RAID 1............................................................................................2–13
2.6.3 RAID 0+1........................................................................................2–13
2.6.4 RAID 4............................................................................................2–15

RAID Array 3000 Storage Subsystem
iv EK–SMCPO–UG. A01
2 RAID Array Controller (continued)
2.6.5 RAID 5............................................................................................2–16
2.6.6 JBOD ..............................................................................................2–18
2.7 System Parameters.............................................................................. 2–18
2.8 Redundant Operation..........................................................................2–20
2.8.1 Initialization....................................................................................2–20
2.8.2 Message Passing..............................................................................2–20
2.8.3 Failover...........................................................................................2–20
2.9 Environmental ....................................................................................2–21
2.9.1 Backup Power Management............................................................ 2–21
2.9.2 Voltage Monitoring.........................................................................2–22
2.9.3 Temperature Monitoring..................................................................2–24
3 Maintenance
3.1 Introduction..........................................................................................3–1
3.2 Pedestal Status and Power LEDs...........................................................3–2
3.3 SBB Status LEDs..................................................................................3–2
3.4 Controller LEDs ...................................................................................3–3
3.5 EMU Error Reporting ...........................................................................3–4
3.6 EMU Error Conditions..........................................................................3–4
3.6.1 Replacing Components (FRU’s)........................................................3–5
3.6.2 Removing the Pedestal Door .............................................................3–5
3.6.3 Replacing an SBB .............................................................................3–6
3.6.4 Replacing a Power Supply.................................................................3–7
3.6.5 Replacing the RAID Array Controller ...............................................3–8
3.6.6 Replacing the EMU Board.................................................................3–9
3.6.7 Replacing the UPS ..........................................................................3–11
3.7 Differential/Wide UltraSCSI Bus........................................................3–11
3.7.1 Reconfiguring the SCSI Bus............................................................3–12
3.8 Replacing the Controller Memory Cache Modules.............................. 3–16

Contents
EK–SMCPO–UG. A01 v
4 Expansion Pedestal Option
4.1 Product Description...............................................................................4–1
4.2 Expansion Pedestal Cabinet...................................................................4–2
4.3 Expansion Pedestal Components...........................................................4–4
4.4 Reconfiguring Base Pedestal UltraSCSI Bus .........................................4–5
5 Second Controller Option
5.1 Introduction...........................................................................................5–1
5.2 Installation Procedure............................................................................5–2
Figures
1–1 RAID Array 3000 Pedestal Enclosure (Drives Optional) .......................1–2
1–2 Pedestal Front Panel Major Components...............................................1–5
1–3 Pedestal Rear Panel Power Supplies......................................................1–5
1–4 EMU Circuit Board Location................................................................1–8
1–5 Pedestal Rear Panel Components...........................................................1–9
1–6 UltraSCSI Bus Configuration Switch...................................................1–10
1–7 Slot Locations and SCSI ID Addresses................................................1–10
1–8 Slot Locations and SCSI ID Addresses................................................1–11
2–1 Bridging the Gap Between the Host and the Pedestal ............................2–2
2–2 Units Created from Storagesets, Partitions, and Disk Drives..................2–3
2–3 Controller Front Panel...........................................................................2–7
2–4 RAID 0 Write......................................................................................2–12
2–5 Diagram of a RAID 1 Write................................................................2–13
2–6 Diagram of a RAID 0+1 Write............................................................2–14
2–7 Diagram of a RAID 4 Write................................................................2–15
2–8 Diagram of a RAID 5 Write................................................................2–17
3–1 Pedestal Status LEDs ...........................................................................3–2
3–2 Disk Drive Status LEDs ........................................................................3–3
3–3 Removing Pedestal Door.......................................................................3–5
3–4 Replacing an SBB.................................................................................3–7
3–5 Replacing a Power Supply.....................................................................3–8
3–6 Removing the Controller from the Pedestal...........................................3–9
3–7 Remove EMU Connector Nuts............................................................3–10

RAID Array 3000 Storage Subsystem
vi EK–SMCPO–UG. A01
Figures (continued)
3–8 Remove Screw and Panel.................................................................... 3–14
3–9 Location of SCSI Bus Configuration Switch....................................... 3–15
3–10 Configuration Switch..........................................................................3–15
3–11 Remove Controller..............................................................................3–16
3–12 Release Locking Clips ........................................................................3–17
3–13 Remove Installed Memory Modules....................................................3–17
3–14 Install Replacement Modules..............................................................3–18
3–15 Pivot Module Down to Secure ............................................................3–19
4–1 Expansion Pedestal...............................................................................4–1
4–2 Expansion Pedestal Slot Locations and ID Addresses............................4–3
4–3 Rear Panel Power Supplies ...................................................................4–4
4–4 EMU Circuit Board Location................................................................4–5
4–5 Remove Side Cover from Base Pedestal ...............................................4–7
4–6 Remove SCSI Bus Terminator..............................................................4–7
4–7 Disconnect SCSI Cable.........................................................................4–8
4–8 Connect SCSI Jumper...........................................................................4–8
4–9 Remove Connector Knockout Plate.......................................................4–9
4–10 Connect SCSI Cable ...........................................................................4–10
4–11 Set Configuration Switch to 7.............................................................4–10
4–12 Configuration Switch..........................................................................4–11
4–13 Reconfigured SCSI Bus Addresses......................................................4–11
4–14 Connect SCSI Cable Between Pedestals..............................................4–12
4–15 Power Cable Connections...................................................................4–13
4–16 Transfer Drives from Base to Expansion Pedestal...............................4–14
5–1 Second Controlle Slot Position..............................................................5–2
5–2 Insert Module into SIMM Connector ....................................................5–3
5–3 Pivot Module Down to Seat..................................................................5–4
5–4 Remove Controller from Top Slot.........................................................5–4

Contents
EK–SMCPO–UG. A01 vii
Tables
1–1 RAID Array 3000 Part Numbers and Model Descriptions......................1–3
1–2 Pedestal Specifications........................................................................1–12
1–3 Pedestal Physical and Power Specifications.........................................1–13
2–1 Controller Specifications.......................................................................2–4
2–2 LED/Reset Switch Interface..................................................................2–6
2–3 RAID Levels Supported......................................................................2–10
2–4 Pedestal RAID Set Restrictions...........................................................2–10
2–5 RAID 0+1 Example.............................................................................2–14
2–6 System Parameters..............................................................................2–19
2–7 Backup Power Management................................................................2–21
2–8 Acceptable System Voltage Levels .....................................................2–22
2–9 Acceptable Termination Voltage Levels..............................................2–23
2–10 Acceptable 12 Volt Levels ..................................................................2–23
2–11 Acceptable External Temperature Voltage Levels...............................2–24
2–12 Acceptable Board Temperature Voltage Levels...................................2–24
3–1 Disk Drive SBB Status LEDs................................................................3–3
3–2 SCSI Bus Length and External Cables.................................................3–11
3–3 Assigned Slot Device Addresses in the Pedestal..................................3–11

EK–SMCPO–UG. A01 ix
Revision Record
This Revision Record provides a concise publication history of this guide. It lists the
revision levels, release dates, and reasons for the revisions.
The following revision history lists all revisions of this publication and their
effective dates. The publication part number is included in the Revision Level
column, with the last entry denoting the latest revision. This publication supports
the StorageWorks RAID Array 3000 Storage Subsystem.
Revision Level Date Summary of Changes
EK–SMCPO–UG. A01 January 1998 Original release.