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Promise Technology 15110 user manual RAID 50 Striping of Distributed Parity

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Chapter 7: Technology Background

RAID 50 – Striping of Distributed Parity

RAID 50 combines both RAID 5 and RAID 0 features. Data is striped across disks as in RAID 0, and it uses distributed parity as in RAID 5. RAID 50 provides data reliability, good overall performance and supports larger volume sizes. RAID 50 also provides high reliability because data is still available even if two disk drives fail (one in each data stripe).

Distributed Parity

Data

Stripe

Disk Drives

Figure 6. RAID 50 Striping of Distributed Parity disk arrays

RAID 50 disk arrays on VTrak consist of 6 to 15 disk drives.

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Promise Technology 15110 user manual RAID 50 Striping of Distributed Parity disk arrays

Contents

Vtrak Trademarks CopyrightImportant data protection information RecommendationsContents VTrak Setup with the CLU Contents Management with the CLU 133Maintenance Support Technology BackgroundAbout This Manual IntroductionVTrak 15110 front view OverviewArchitectural Description Features and BenefitsFeature Benefit Allows you to manage the RAID subsystem RAID SpecificationsFCC Statement Unpack the VTrak InstallationRackmounted VTrak Mount VTrak 15110 in a RackInstall Disk Drives VTrak 15110 Disk Drive access Drive Carrier mounting holes Sata Disk Drives mount at the front of the carrier Serial ATA Disk DrivesPata Disk Drives require a PATA-to-SATA adapter Parallel ATA Disk DrivesVTrak disk drives are numbered left to right Drive NumberingVerify the Scsi HBA Card VTrak 15110 Scsi connections Connect the Scsi CablesPages Scsi TerminatorConfiguration 2 One VTrak, one Host PC, two Scsi HBA cards Configuration 1 One VTrak, one Host PC, one Scsi HBA cardHost PC Scsi Configuration 5 Two VTraks, one Host PC, two Scsi HBA cards RS-232 Serial Connection Connect the Management CablesManagement Port Connection Macintosh Users Connect the PowerVTrak 15110 Displays Terminal Emulation Set-up Management ConnectionsSet IP Addresses and Subnet Mask Snmp Page Enable Telnet on VTrak Set Up Telnet ConnectionWindows and Linux Mac OSHyperTerminal Windows or Minicom Linux Make a Telnet ConnectionCommand Line Windows or Terminal Icon Linux Page Utility Server Installation Locations Install WebPAM PRO SoftwareInstallation Guidelines Operating System SupportWebPAM PRO on a network Cimom AgentInternet Browser Install WebPAM PROBefore you start… WindowsSolaris Installation Under All Supported Operating Systems Page Installation Page Installation Page Log-in to WebPAM PRO VTrak Setup with WebPAM PRORegular Connection Http//192.168.10.468080/promiseHttps//192.168.10.468443/promise Secure ConnectionSetup Add a Subsystem VTrak Access a Subsystem VTrakSetup Create a Disk Array Express Option Automatic OptionPage Advanced Option Page Setup Create a Logical Drive Assign a Scsi Target ID Log-out of WebPAM PRO Internet Connection using WebPAM PROCLU Connection VTrak Setup with the CLUCreate a Disk Array Automatically Create a Disk Array Manually Maxtor 5A250J0 RAID SBS CAP Mapping for Disk Array TIDs for Scsi channel 1 changed Press Enter key to return Exit the CLU Management with WebPAM PRO VTrak Status IndicatorsState LEDs Drive Status IndicatorsLEDs State Audible AlarmHttps//192.168.1.468443/promise Log-in/Log-outHttp//192.168.1.468080/promise Management with WebPAM PRO WebPAM PRO Opening Screen Subsystem User Rights Subsystem ManagementRight Meaning Access a Subsystem VTrak View Event Log Subsystem Management WindowManagement with WebPAM PRO Delete a Subsystem Add a User User ManagementEvent Notification Meaning Connection between Host PC and UltraTrak has Meaning 45C or discharge above 60C Manage User Rights Delete a UserRight Meaning Change Password Setup Email Alert Notification Web Server Software ManagementPort number for secure connections is Firmware Update Tftp Server Security Restart Tomcat Service WindowsRefresh Time Events Management with WebPAM PRO User Rights Connection StatusSubsystem Health VTrak ManagementLock Operations MP/PDM Settings Scsi Management LUN SettingsTID Settings Ethernet Network ManagementStatistics Service Service ManagementSettings Snmp Telnet ControllersController List ControllerController Parameters Enclosure List EnclosuresFRU VPD EnclosureBuzzer BatteryEnclosure Front View Physical Drive ListPhysical Drive Information Physical Drive109 Disk Array Parameters Disk ArraysDisk Array List 111 112 113 Advanced Option 115 Delete Disk Array Disk Array Information Disk Array InformationDisk Array and Logical Drive Status Definitions Disk Array Settings Create Logical Drive Background Activity Delete Logical DriveScheduler Logical Drive Parameters Logical Drive ListLogical Drive Logical Drive Information Logical Drive LUN Settings Physical Drives Spare DrivesLogical Drive Alias Create a Spare Drive Spare Drive ListDelete a Spare Drive Logical Drive Summary 131 132 Management with the CLU 134 Management with the CLU Alarm Settings Audible AlarmSerial Connection CLU ConnectionTelnet Connection Telnet 192.168.1.56There are nine functional groups in the CLU 139 Please enter your menu choice4 How to use the CLU141 CLU Function Map 143 144 LUN 146 147 Modify Controller Parameters Controller ManagementView Controller Information VPD Reboot150 Fan Speed Enclosure ManagementVoltage Temperature153 Physical Drive Management View Parameters Enable/Disable Write CacheWipe Out Reserve Sector Wipe Out Boot SectorBlink LED DiagnosticsPhysical Drives IO Statistics WDC WD1200JD Disk Array Management Disk Array Auto Creation Create New Disk Array WDC WD2000JB-00FUA0 Disk Array Properties Create Logical Drive Cache Policy Delete Logical DriveRetry Count Enable/Disable SmartDisk Array Name PriorityPDM Hot Spare PolicyAuto Rebuilding PDM Auto StartPDM Auto Start Disabled Enable PDM Auto starty/n?y 171 Scsi Assignment Logical Drive ManagementName Management Port Enable/Disable Telnet Change User Name TimeoutChange Password Reset to Default Settings Read only Community LocationContact Person Trap Sinks PingTrap Only Community Number of ping packets1-30?5 Channel TID RAID Console LUN Rbld Maintenance Menu Disk Array OperationsMigrate Disk Array Maintenance Activity MonitorMigrate Disk Array 1 nowy/n?y Manual RebuildRAID3 Manual PDMRedundancy Check Synchronize Logical DriveMedia Patrol Event Viewer Maintenance Preparation Firmware Update WebPAMTftp Server IP Address Tftp Server Directory NameFirmware Image File Tftp Server Firmware Update CLU193 Firmware Image File Firmware Update Serial PortScrub DDR, waiting Platform Init Done Replace Power Supply Replace Cooling Unit Fan Disconnect 199 200 201 Replace Cache Battery Detach Replace SEP Replace RAID Controller 206 Introduction to RAID Technology BackgroundRAID 0 Striping interleaves data across multiple drives RAID 0 StripingRAID 1 Mirrors identical data to two drives RAID 1 MirroringRAID 3 Stripes data and adds a dedicated Parity Drive RAID 3 Block Striping with Dedicated ParityRAID 5 Stripes all drives with data and parity information RAID 5 Block Striping with Distributed ParityRAID 10 Mirroring / Striping RAID 50 Striping of Distributed Parity disk arrays RAID 50 Striping of Distributed ParityAdvantages Disadvantages Choosing a RAID Level215 216 Initialization Choosing Stripe Block SizeGigabyte Boundary Partition and Format the Logical Drive Hot Spare DrivesRAID Level Migration Cache SettingsWhere to Make Settings Performance From Increase Redundancy CapacityAdd Lose Ranges of Disk Array Expansion Current LD Size Maximum LD Sector Size Expansion Size VTrak is Beeping CLU Reports a ProblemWebPAM PRO Reports a Problem Troubleshooting Front Panel LEDs Display Amber or RedConnection Green Drive Status IndicatorsDark Steady Flashing Amber Red Dark Green Amber Red Back of EnclosureEvent Action Event Notification ResponseController Notification Connection NotificationLogical Drive Notification, Disk NotificationLogical Drive Notification 232 Enclosure Notification Rebuild When a Disk Drive FailsCritical & Offline Disk Arrays Without a Hot Spare Drive Enclosure ProblemsWith a Hot Spare Drive 236 Overheating Battery Power SuppliesSerial Connections Connection ProblemsScsi Connections Network Connections What kind of disk drives can I use with VTrak? Frequently Asked QuestionsCan I use my existing Scsi card with VTrak? How many VTrak subsystems can I connect to one Scsi chain?Can WebPAM PRO connect through VTrak’s Serial RS-232 port? How can I tell when the VTrak has fully booted?Are disk arrays on VTrak limited to 2.199 terabytes? How can I be sure everything is working OK on the VTrak? North & South America Technical Support ServicesContacting Technical Support Pacific Rim Europe, Africa, Middle EastChina Disclaimer of other warranties Limited WarrantyYour Responsibilities Returning Product For RepairOr retailer Pin Signal Appendix a Serial Connector Pinout252 Index FRU LED 24, 65, 133 RAID 0 208 RAID 1 209 241