RAID Array Controller | Compaq EK-SMCPO-UG. C01 manual

Chapter 2

RAID Array Controller

This chapter describes the major features and characteristics of the RAID array controller in the RAID Array 3000 subsystem. The number of devices supported by the controller may be limited by the enclosure.

Controller Overview

The RAID Array controller provides high performance, high-availability access to SCSI disk array subsystems along a UltraSCSI/Wide SCSI bus. With a modular hardware design and an intuitive configuration utility, the controller is designed to meet a wide range of storage needs.

The controller consists of a single 5 ½ in (14.2 cm) x 8 in (20.3 cm) PCB mounted in a sheet metal subassembly. The package consists of the controller PCB, a 300-pin connector, mechanical insertion assists, and a LED/reset switch interface. All signals to the controller are routed through the backplane connector.

The unit is configured with two Ultra Wide, differential SCSI host channels capable of transferring data to and from the host at rates up to 40 Mb/s. The host SCSI IDs are configurable via the host parameters and can support

32-deep tagged queuing. The controller is also configured with two Ultra Wide, single-ended SCSI disk channels capable of transferring data to and from the disk drives at rates up to 40 Mb/s. Each channel can support up to 15 drives (14 in redundant controller subsystems).

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Compaq EK-SMCPO-UG. C01 manual RAID Array Controller, Controller Overview

Contents

Compaq StorageWorks Page Contents RAID Array Controller List of Figures RAID 0 write List of Tables Page About This Guide Maintenance Related Documents Text Conventions Symbols in Text This is a test Rack Stability Compaq Website Product Description Product Overview RAID Array 3000 pedestal enclosure drives optional RA3000 pedestal subsystem with one controller, 230 Compaq Part No Pedestal Cabinet Pedestal Features Pedestal front panel major components RAID Array Controller Pedestal ComponentsStorageWorks Building Blocks SBBs UPS Pedestal Power Supplies EMU circuit board location Environmental Monitor Unit EMU Shows the Pedestal rear panel components UltraSCSI Buses UltraSCSI bus port and default Scsi ID assignments UltraSCSI bus configuration switch Connecting the Pedestal to a Host System ItemÂDescription Single Host, Single Adapter Cabling Description Single Host, Dual Adapter/Dual Controller Cabling Host System Dual Host, Single Adapter/Single Controller Cabling Pedestal Technical Specifications Specifications Power Specifications Pedestal Physical and Power SpecificationPhysical Specifications Dimension Controller Overview RAID Array ControllerPage Bridging the gap between the host and the pedestal Controller Features Units created from storagesets, partitions, and disk drives Specifications Controller Specifications Controller Specifications Name Controller Reset and LED IndicatorsLED/Reset Switch Interface Environmental Shows the front panel of the controller Flexible RAID Set Configuration Custom Components Performance Enhancements Write-Back Caching Efficient Write and Read Algorithms Write On Top Write Gathering Max. No. * of Drives RAID Levels SupportedRAID Levels Supported Pedestal RAID Set Restrictions RAID Shows a diagram of a RAID 0 write RAID 0+1 Diagram of a RAID 1 write Function RAID 0+1 ExampleDrives Selected Diagram of a RAID 4 write Page Diagram of a RAID 5 write Just a Bunch of Drives Jbod Redundant Operation Failover EnvironmentalInitialization Message Passing Response Backup Power ManagementResponse to Various AC Power Conditions Condition Termination Voltage Voltage MonitoringSystem Voltage Acceptable System Voltage Levels Supply Voltage Temperature MonitoringExternal Temperature Acceptable External Temperature Levels Acceptable Board Temperature Levels Board TemperaturePage Maintenance Pedestal Status and Power LEDs Shows the Pedestal status LEDs SBB Status LEDs Disk Drive SBB Status LEDs Activity LED Fault LED IndicationController LEDs EMU Error Conditions EMU Error Reporting Replacing Components FRUs Replacing an SBB Removing the Pedestal Door Replacing an SBB Replacing a power supply Replacing a Power Supply Removing the controller from the pedestal Replacing the RAID Array Controller Tools required Replacing the EMU Board Remove standoffs from UPS and external fault connectors Replacing the UPS Differential/Wide UltraSCSI Bus Rate Bus Length Reconfiguring the Scsi BusScsi Bus Length and External Cables Assigned Slot Device Addresses in the Pedestal Maintenance Shows how to remove the screw and panel Close the side panels and replace the cover screw 11. Remove controller Replacing the Controller Memory Cache Modules 12 shows how to release the locking clips 14. Install replacement Simm Expansion Pedestal Option Shows the Expansion Pedestal Expansion Pedestal Cabinet Expansion Pedestal Option Expansion Pedestal Components Shows the rear panel power supplies EMU Reconfiguring Base Pedestal UltraSCSI Bus Remove the side cover from the base pedestal Figure Disconnect Scsi cable Connect Scsi jumper Remove connector knockout plate 10. Connect Scsi cable Set the bus configuration switch to 7 Figures 4-11 13. Reconfigured Scsi bus addresses 14. Connect Scsi cable between pedestals 15. Power cable connections 16. Transfer drives from base to expansion pedestal Second Controller Option Second controller pedestal slot location Second Controller Option Kit Saving Existing Configuration Installing the Upgrade Updating Firmware Updating Firmware Using Swcc Firmware update dialog box Updating Firmware Using Serial Interface Shutting Down the RA3000 Insert Simm into connector Installing Two SIMMs into Second Controller Remove controller from top slot Replacing Existing Controller Restoring configuration to new controller Restoring the Configuration Updating Firmware on Second Controller 10. Restored configuration example Installing Original Controller Configuring the RA3000 for the Active Mode Operation Configuring the Dual Controllers Connecting to Your Dual Controller Storage System Verifying the Controller Operating Parameters