StorageWorks™ Array Controllers HS Family of Array Controllers User’s Guide Order Number: EK–HSFAM–UG. D01 The StorageWorks Array Controllers HS Family of Array Controllers User’s Guide contains instructions for installing and using HSJ30, HSJ40, HSD30, HSZ40–Ax, and HSZ40–Bx array controllers. Digital Equipment Corporation Maynard, Massachusetts March 1995 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. The software described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license. No responsibility is assumed for the use or reliability of software on equipment that is not supplied by Digital Equipment Corporation or its affiliated companies. 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. © Digital Equipment Corporation 1995 Printed in U.S.A. All Rights Reserved. NOTE: This equipment 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 digital device pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. Any changes or modifications made to this equipment may void the user’s authority to operate the equipment. Operation of this equipment in a residential area may cause interference in which case the user at his own expense will be required to take whatever measures will be required to take whatever measures may be required to correct the interference. Alpha, AlphaServer, CI, DEC, DECconnect, DECevent, DEC OSF/1, HSC, HSD30, HSJ, HSZ, MSCP, OpenVMS, OpenVMS AXP, StorageWorks, TMSCP, VAX, VAXcluster, VAXsimPLUS, VMS, VMScluster, and the DIGITAL logo are trademarks of Digital Equipment Corporation. OSF and OSF/1 are registered trademarks of the Open Software Foundation, Inc. All other trademarks and registered trademarks are the property of their respective holders. This document was prepared using VAX DOCUMENT Version 2.1. Contents Preface ............................................................ xv 1 Introduction to HS Array Controllers 1.1 Overview of HS Array Controllers ............................... 1–1 1.2 Housing for HS Array Controllers ............................... 1–2 1.3 Physical Description of HS Array Controllers ...................... 1–2 1.3.1 HSJ30 and HSJ40 Array Controllers Physical Description . ....... 1–2 1.3.2 HSD30 Array Controller Physical Description ................... 1–4 1.3.3 HSZ Array Controller Physical Description ..................... 1–6 1.4 Controller Host Interface Protocols .............................. 1–7 1.5 Addressing Storage Within the Subsystem . ....................... 1–8 1.5.1 Controller Storage Addressing ............................... 1–8 1.5.2 Host Storage Addressing . ................................ 1–10 1.5.3 Host Storage Addressing (HSZ Array Controllers) . ............... 1–11 1.6 HSJ Array Controller Dual Data Link ............................ 1–12 1.7 HS Array Controller Features . ................................ 1–12 1.8 Controllers and Cache Modules Specifications ...................... 1–14 1.9 Ordering HS Array Controller Cache Modules ...................... 1–15 1.10 StorageWorks Controller Subsystem Products ...................... 1–16 1.10.1 Controller Shelf . ........................................ 1–17 1.10.2 BA350–SB SBB Shelf ...................................... 1–18 1.11 MSCP and TMSCP Protocols (to Hosts) ........................... 1–19 1.12 SCSI Protocol (to Hosts) ....................................... 1–19 1.13 SCSI Protocol (to Devices) ..................................... 1–19 2 Controller Technical Description 2.1 HS Array Controller Hardware Functional Overview . ............... 2–1 2.1.1 Policy Processor Hardware . ................................ 2–2 2.1.2 Bus Exchangers . ........................................ 2–2 2.1.3 CI, DSSI, or SCSI–2 Interfaces (Host Ports) .................... 2–3 2.1.4 SCSI–2 Device Ports (Buses) ................................ 2–3 2.1.5 Read Cache Module ....................................... 2–3 2.1.6 Write-Back Cache Module . ................................ 2–3 2.1.6.1 Battery Discharging .................................... 2–4 2.1.6.2 Battery Charging ...................................... 2–5 2.1.7 Operator Control Panel .................................... 2–6 2.1.7.1 HSJ40 and HSJ30 Array Controller OCP ................... 2–6 2.1.7.2 HSD30 Array Controller OCP ............................ 2–7 2.1.7.3 HSZ Array Controller OCP .............................. 2–8 2.1.8 Program Card (PCMCIA) . ................................ 2–9 2.1.9 Nonvolatile Memory (NVMEM) .............................. 2–10 2.1.10 Maintenance Terminal Port . ................................ 2–10 iii 2.1.11 Dual Controller Port ...................................... 2–12 2.2 HS Array Controller Firmware Overview . ....................... 2–12 2.2.1 Core Functions . ........................................ 2–13 2.2.1.1 Controller Self-Test and Diagnostics ....................... 2–13 2.2.1.2 Executive Functions .................................... 2–13 2.2.2 Host Interconnect Functions ................................ 2–13 2.2.3 Operator Interface and Subsystem Management Functions . ....... 2–14 2.2.3.1 Command Line Interpreter .............................. 2–14 2.2.3.2 Diagnostic Utility Protocol ............................... 2–14 2.2.3.3 HSZ Array Controller Virtual Terminal Connection ............ 2–14 2.2.3.4 Local Programs ....................................... 2–14 2.2.3.5 Error Logging and Fault Management ...................... 2–15 2.2.4 Device Services . ........................................ 2–15 2.2.5 Value-Added Functions .................................... 2–15 2.3 What Is Failover? ............................................ 2–16 2.3.1 Setting Failover . ........................................ 2–17 2.3.2 Exiting Failover . ........................................ 2–18 2.3.3 Taking Controllers Out of Failover ............................ 2–18 2.3.4 Using Failover Commands When Write-Back Cache Is in Use ....... 2–19 2.3.5 Resolving a Configuration Mismatch after a Hardware Mismatch .... 2–19 2.4 HSZ Array Controller Failover Operation . ....................... 2–20 2.4.1 Transparent Controller Failover Resulting from a Fault ........... 2–20 2.4.2 Transparent Controller Failover Resulting from Operator Action .... 2–22 3 Configuration Rules and Restrictions 3.1 Ordering Considerations ...................................... 3–1 3.2 Cabinets . ................................................ 3–1 3.2.1 SW800-Series Data Center Cabinet ........................... 3–2 3.2.2 SW500-Series Cabinets .................................... 3–6 3.2.3 SW300-Series Deskside RAID Enclosure ....................... 3–8 3.2.4 Shelves . ................................................ 3–9 3.2.4.1 BA350-Series . ........................................ 3–10 3.2.4.2 SW300-Series Cabinet Shelf .............................. 3–11 3.3 Controllers . ................................................ 3–12 3.3.1 Nonredundant HS Array Controller Configurations ............... 3–13 3.3.2 Dual-Redundant HS Array Controller Configurations ............. 3–13 3.3.3 Optimal Performance Configurations . ....................... 3–14 3.3.4 Optimal Availability Configurations ........................... 3–15 3.4 Typical and Recommended Configurations . ....................... 3–17 3.4.1 3½-Inch SBB Restrictions . ................................ 3–17 3.4.2 3½-Inch SBB Recommended Configurations .................... 3–17 3.4.3 5¼-Inch SBB Restrictions . ................................ 3–19 3.4.4 5¼-Inch SBB Recommended Configurations .................... 3–20 3.4.5 Intermixing 5¼-Inch and 3½-Inch SBBs ....................... 3–21 3.4.6 Atypical Configurations .................................... 3–21 3.4.7 SW300-Series Cabinet Deskside RAID Configuration ............. 3–22 3.5 Host Port Cable Lengths ...................................... 3–24 3.6 CD–ROM Restrictions ........................................ 3–25 3.7 Host Adapter Support ........................................ 3–25 3.7.1 HSJ Array Controllers Host Adapter Support ................... 3–25 3.7.2 HSD30 Array Controller Host Adapter Support . ............... 3–25 3.7.3 HSZ Array Controller Host Adapter Support .................... 3–26 iv 4 Installation 4.1 Customer Site Preparation ..................................... 4–1 4.1.1 Power and Power Cord Requirements . ....................... 4–2 4.1.2 Shelf Power Configuration Rules ............................. 4–2 4.1.3 Environmental Considerations ............................... 4–2 4.2 Before You Begin ............................................ 4–3 4.2.1 Personnel Needed for Installation ............................ 4–3 4.2.2 Tools Needed for Installation ................................ 4–3 4.2.3 Electrostatic Discharge Protection Guidelines ................... 4–4 4.3 Controller Components Handling Guidelines ....................... 4–4 4.3.1 Module Handling Guidelines ................................ 4–5 4.3.2