Data, Bbb, Eee, Fff | IBM SG24-4576-00 instruction



					Disk
				Controller






DATA		AAA			BBB			CCC

DATA MIRROR		CCC			AAA			BBB

DATA		DDD			EEE			FFF

DATA MIRROR		FFF			DDD			EEE

		Disk 1			Disk 2			Disk 3

Figure 14. RAID-1 Enhanced, Data Strip Mirroring

Some vendors have also implemented another slight variation of RAID-1 and refer to it as RAID-10 since it combines features of RAID-1 and RAID-0. Others refer to this technique as RAID-6, which is the next available RAID level.

As shown in Figure 15, this solution consists of mirroring a striped (RAID-0) configuration. In this example, a RAID-0 configuration consisting of 2 drives (drive 1 and 2) is mirrored to drives 3 and 4.



	Disk
	Controller




	AAA			BBB			AAA			BBB

	CCC			DDD			CCC			DDD

	EEE			FFF			EEE			FFF

	GGG			HHH			GGG			HHH

	Disk 1			Disk 2			Disk 3			Disk 4

Figure 15. RAID-6,10 - Mirroring of RAID 0 Drives

Performance and capacity are similar to RAID 1. 50% of total disk capacity is usable. However, this solution always uses an even number of disks. RAID-1 enhanced can use an odd number of disks. RAID-1 also can be mixed with others RAID levels.

26NetWare Integration Guide

Image 41

IBM SG24-4576-00 manual Data, Bbb, Eee, Fff

Contents

December IBM PC Server and Novell NetWare Integration Guide Take Note First Edition December Abstract Contents IBM PC Server Family Overview Novell NetWare Installation Appendix C. Configuring DOS CD-ROM Support Appendix A. Eisa Configuration File Figures RAID NetFinity Network Driver Configuration Tables Summary of RAID Performance Characteristics IBM Special Notices VM/ESA How This Document is Organized Preface Related Publications How to Order Itso RedbooksInternational Technical Support Organization Publications Itso Redbooks on the World Wide Web WWW Acknowledgments Clock Rate IBM PC Server TechnologiesProcessors Processor Types External Interfaces Memory Multiprocessing ∙ Write-Through Cache Caches ∙ Write-Back Cache SMP Caching Shows SMP with dedicated secondary cache Memory Interleaving Two-Way Interleaved Memory Banks Dual Path Buses Scsi SynchroStream TechnologyCPU Standard Parity Memory Memory Error Detection and CorrectionError Correcting Code ECC ECC Memory Operation Error Correcting Code-Parity Memory ECC-P Data 4 parity Bits for data Bits for ECC Memory Controller ECC on SIMMs EOS Memory Bus Architectures Performance ImpactMemory Options and Speed Eisa Bus ISA BusMicro Channel Bus Data Streaming Micro Channel Basic Data Transfer 20 MBps Micro Channel Data Streaming Transfer 80 MBps PCI Bus Hard Disk Interfaces Disk Subsystem ∙ SCSI-I and SCSI-II Scsi Technology ∙ Tagged Command Queuing TCQ ∙ Common Command Set∙ Scatter/Gather ∙ Fast/Wide Devices and Controllers ∙ Synchronous versus Asynchronous Scsi Adapters ∙ IBM SCSI-2 Fast/Wide Streaming-RAID Adapter/A Summary Hard Disk Drives Mtbf RAID Technology RAID Level Description RAID Classifications RAID-1 Disk Mirroring/Duplexing RAID-0 Block Interleave Data Striping without Parity Disk Controller RAID-1 Enhanced Data Strip Mirroring BBB DataEEE FFF RAID-2 Bit Interleave Data Striping with Hamming Code RAID-2 Bit Interleave Data Striping with Hamming Code RAID-4 Block Interleave Data Striping with One Parity Disk RAID-3 Bit Interleave Data Striping with Parity Disk RAID-4 Block Interleave Data Striping with One Parity Disk RAID-5 Block Interleave Data Striping with Skewed Parity Summary of RAID Performance Characteristics Shared RAM Adapters RecommendationsLAN Subsystem Bus Master Adapters PeerMaster Technology Security Features Secure I/O Cables PasswordsTamper-Evident Cover Secure Removable Media Privileged-Access Password Selectable Drive Startup Unattended Start ModeSystems Management 1 DMI Management Information Format MIF Communicating Service Layer Component Interface CI SnmpManagement Interface MI Snmp Agent Management Information Base MIBSnmp Manager Traps ∙ System Information NetFinity ServicesNetFinity ServerGuard Service System Partition AccessECC Configuration ∙ Serial Control Service ∙ Remote Systems Manager NetFinity Manager NetFinity Architecture SystemView End-Use dimensionDMI Support Interoperability with Other Management Tools Data dimension Application dimension SystemView Management Protocols Fault ToleranceManaged resource dimension Communication links NetWare SFTSFT III Server Roles IOEngines and Mirrored Server MS Engines NetWare Integration Guide IBM PC Server Technologies Uninterruptible Power Supply UPS Flex Events APC PowerChute NetWare Integration Guide Shows the products in relation to one another IBM PC Server Family Overview IBM PC Server IBM PC Server Model Specifications 0XT MXT IBM PC Server 320 Eisa IBM PC Server 320 MCA 0YT 0YV 0YR 0YS IBM PC Server 520 Eisa IBM PC Server 520 MCA 2ZS 4ZS Hardware Configuration PCI/ISA/EISA Main Menu Setup Program IDE Devices Video Bios ShadowAdvanced Menu Diskette Drive Error Advanced Menu Boot Options Integrated IDE adapter Select Advanced Menu Peripherals Security Enter password A r d w a r e Configuration Do you want to configure your system now Y,N? Eisa Configuration Utility Eisa Configuration Utility Step ISA IDE Change Settings Scsi Scsi Select Utility Program Bit 68pin Bit 50pin Low High Device Configuration Is disabled Host Adapter Scsi ID #9 System Programs Starting From the System Partition Update system programs Backup/restore system programStarting From the Reference Diskette Main Menu Options Set features Set configurationCopy an options diskette Test the computer Set Configuration Menu Backup/Restore System Programs MenuBackup the system diskettes Backup the system partition System Programs Set Configuration Menu View configuration System Programs View Configuration Screen Change configuration Restore configuration Backup configurationRun automatic configuration Display memory map Set Configuration Memory Map Set and view Scsi device configuration Set Configuration Scsi Device Configuration Set Features Menu Set Features Menu Change power-on password Set power-on password Set unattended start mode Remove power-on passwordSet privileged-access mode Change privileged-access password Set unauthorized-access monitor Remove privileged password∙ Normal keyboard ∙ Fast keyboard On page 97 will appear Test the Computer Set Power-On Features Screen Display revision levels Display system error logMore Utilities Menu Stand-alone utility information Advanced Diagnostic ProgramSet and view system identification Set character font Run the test one time Advanced Diagnostic Menu RAID Controller Utility Log or display the errorsLow-Level Format Program Run the test continuously RAID Configuration Program Adapter Selection Drive Information RAID Configuration Program Drive Information Select Format drive Formatting the Disks Panel for changing RAID parameters looks like Figure Change RAID Parameters Defining a Hot-Spare Disk RAID Configuration Program Create/Delete Array Menu Creating a Disk Array RAID Configuration Program Disk Array Creation Defining Logical Drives RAID Configuration Program Logical Drive Definition RAID Configuration Program RAID level Selection RAID Configuration Program Size Definition Backup/Restoring the Configuration Setting the Write PolicyInitializing the Array Select Change write policy Select Restore config. from diskette Select Backup config. to diskette Starting ServerGuide Novell NetWare InstallationServerGuide Overview ServerGuide Language ServerGuide Main Menu Select Software Installation Installing NetWare 4.1 with ServerGuideSelect Novell NetWare Select United States Installing NetWare Select Install NetWare Configuring NetWare Configuring IBM NetFinity Partitioning the Hard Disk Reviewing Configuration Unlocking Programs Installing NetWare Directory Services NDS Case-sensitive Information Requested at Time of Installation Installing NetWare 3.12 with DiskettesInstallation Files Hardware Requirements LAN Drivers Installation ProcedureDisk Drivers Select Retain Current Disk Partition and then press Enter NetWare Installation Type Load CSERVER.312IBMRAID Partition Information Select System Options Volume Status Select Create STARTUP.NCF File Bind IPX to Token STARTUP.NCF File Select Create AUTOEXEC.NCF File Installing NetWare 4.1 with the Original CD-ROM ∙ Simple Installation Select NetWare Server Installation and press Enter∙ Custom Installation Select Custom installation of NetWare 4.1 and press Enter Disk Driver Options Select Return to Previous Menu and press Enter Select Create NetWare disk partition New Volume Information Install NetWare Directory ServicesNDS Context for the Server Editing STARTUP.NCF File File Copy Status Installing NetFinity Services for NetWare NetFinity Services for NetWareInstalling with Diskettes on the NetWare Server System Requirements Type a name for your server Choose keyword number to edit Search ADD SYSNETFIN\ Load Netfbase Installing with Diskettes from a Workstation NetFinity Services for NetWare Network Driver Configuration Starting NetFinity Select Options Select Service Execution Alerts Installing from a Workstation RAID Administration for NetWare UtilityInstalling the Utility Copying NLMs to the NetWare Server Hard Disk Failure Simulation Simulating with a Hot Spare Drive RAID Administration Utility Main Menu Verifying Array Configuration Detecting the Disk Failure Disk Failure NetFinity RAID Service RAID Administration Recovery Message Changes in Array Configuration NetFinity New Hot Spare Drive Alert Simulating without a Hot Spare Drive NetFinity RAID Service New Hot Spare NetFinity RAID Service Verifying Configuration NetFinity Alert Log Last Event Message RAID Administration Rebuild Progress RAID Administration Verifying the Rebuild Status Hardware Tuning Performance Tuning General Performance Characteristics File Server Performance General Characteristics NetWare Integration Guide Differences in LAN Adapters DatagLANce Performance Analysis Tools MONITOR.NLM NetWare Monitoring Tools Monitor Utility Set Command SERVMAN.NLM Tuning NetWare SET Cache Buffer SIZE=VALUE Block Size and Cache Buffer Size NetWare SET Turbo FAT RE-USE Wait TIME=VALUE Block Size NetWareTurbo Fat Indexing SET Maximum Directory Cache BUFFERS=VALUE Directory CachingSET Directory Cache Allocation Wait TIME=VALUE NetWare 3.12 SET Maximum File Cache Buffers = Value File CachingSET Minimum File Cache Buffers = Value SET Maximum Concurrent Disk Cache WRITES=VALUE Maximum Concurrent Disk Cache Writes Spanning Volumes Over Multiple Drives Dirty Disk Cache Delay TimeMultiple Volumes Immediate Purge of Files SET Enable Read After Write VERIFY=VALUE Enable Disk Read After Write VerifyNetwork Subsystem LAN Device Driver Efficiency Packet Receive Buffers Packet SizeSET Maximum Physical Receive Packet Size = Value Recommendation Recommendation New Packet Receive Buffer Wait Time System MemoryNetWare 3.12 Memory Pools SET NEW Packet Receive Buffer Wait TIME=VALUE NetWare 4.1 System Memory Pools Calculating Server Memory Requirements Memory RequirementsSystem Processor Load Monitor -P System Board Memory Appendix A. Eisa Configuration FileSYS On OFF OFF OFF on Jumper Name W28 PCI IDE IRQ Default factory settings OTH PNP MSD PCI DMA IRQ 2F3h 400h Eisa 199 Finding Compatibility Information on the World Wide Web Sample Compatibility Report Showing Ethernet LAN Adapters Finding Device Drivers on the World Wide Web Finding Software Patches on the World Wide Web Installing CD-ROM Support for PCI Adapters Appendix C. Configuring DOS CD-ROM SupportInstalling CD-ROM Support for Adaptec Adapters Installing CD-ROM Support for Micro-Channel Adapters ∙ MSCDEX.EXE Itso List of Abbreviations Numerics Index Special Characters DMI Nvram RAID-0 RAID-1 Security TCP/IP Comments/Suggestions Itso Technical Bulletin EvaluationPlease answer the following questions Itso Technical Bulletin Evaluation RED000 SG24-4576-00 Ibml Ibml Figures Test CH3 Sgover NW41DD WRAID07 Raidadm Headings File References Servs CH1E Index Entries File References Tables Processing Options Imbed Trace