Promise Technology EX8650 RAID 0 Stripe, RAID 0 Striping interleaves data across multiple drives

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SuperTrak EX Series User Manual

RAID 0 – Stripe

When a logical drive is striped, the read and write blocks of data are interleaved between the sectors of multiple physical drives. Performance is increased, since the workload is balanced between drives or “members” that form the logical drive. Identical drives are recommended for performance as well as data storage efficiency.

Figure 1. RAID 0 Striping interleaves data across multiple drives

Data

Stripe

Physical Drives

The logical drive's data capacity equals the capacity of the smallest physical drive times the number of physical drives. For example, one 100 GB and three 120 GB drives will form a 400 GB (4 x 100 GB) logical drive instead of 460 GB.

If physical drives of different capacities are used, there will also be unused capacity on the larger drives.

RAID 0 logical drives on SuperTrak consist of one or more physical drives.

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Contents Supertrak Copyright TrademarksImportant data protection information RecommendationsRadio Frequency Interference Statement Page Contents Installing Drivers, SuperBuild UtilitySuperBuild Utility, Management with WebPAM PRO, Management with WebPAM PRO, Management with WebPAM PRO, Contents Appendix a Partition and Format Appendix B Upgrades Technology Background,Support 209Introduction About This ManualProduct Overview XOR MicroprocessorHot-Swapping WebPAM PRO Management Software Operating System SupportBrowser Support Key Features and Benefits Advanced Hardware Design Features BenefitsCompatibility Features Benefits Specifications Features BenefitsCompatibility Installation Unpacking the SuperTrakInstalling the SuperTrak Card SuperTrak EX4650 card SuperTrak EX8650 card + R G + + - + SAS Connections and ID Numbers Scenario 1 Virtual Enclosure SgpioSuperTrak SAS Port Enclosure ID Range Drive ID Range Scenario 2 Virtual Enclosure Host PC Scenario 3 External Enclosures Daisy ChainScenario 4 External Enclosures Parallel Scenario 5 SAS ExpandersChoosing the Physical Drives Level Number of DrivesCreating a Logical Drive Page Installation Page Installation Installing WebPAM PRO Utility ServerAgent Operating System SupportInternet Browser Browser SupportInstalling WebPAM PRO onto a Windows PC or Server Introduction dialog boxLicense Agreement dialog box Setup Type dialog box Choose Destination Location dialog box SSL Security Options dialog box Ready to Install dialog box Install Complete dialog box Installing WebPAM PRO onto a Linux PC or Server License Agreement dialog box Choose Install Product dialog box Choose Install Folder dialog box WebPAM PRO Agent Configuration dialog box SSL Security Options dialog box WebPAM PRO Utility Server Configuration dialog box Register On-line dialog box Logging into WebPAM PRO Logging in at the Host PCLogging in over the Network Regular ConnectionLogin Screen Https//192.168.10.2288443/promiseSetting up WebPAM PRO Click the Add Subsystem/Host tabAdd Subsystem/Host tab Installing Drivers Driver Diskette for Windows USB Memory Stick for WindowsDriver Diskette for Linux New OS Installation Windows VistaConfirming Driver Installation Existing SystemWindows Server Existing System Windows XP Existing System Windows Existing System Red Hat Linux Enterprise 4.4 Type cd umount /mnt/floppySuSE Linux Enterprise SuperTrak Bios SuperBuild UtilitySuperTrak Bios screen SuperTrak Bios screen, logical drive offline Main Menu SuperBuild Main MenuController Selection Controller Information Physical Drive Management Viewing Physical DrivesViewing Physical Drive Information Managing Physical Drive Problems Disk Array Management Viewing Disk ArraysViewing Disk Array Information Creating a Disk Array Changing Disk Array Settings Rebuilding a Disk ArrayDeleting a Disk Array Logical Drive Management Viewing Logical DrivesViewing Logical Drive Information Creating a Logical Drive Write Cache Policy Choose from Write Back or Write ThroughInitializing a Logical Drive Changing Logical Drive Settings Deleting a Logical DriveManaging Logical Drive Problems Identifying a Critical Logical DriveRebuilding the Logical Drive Spare Drive AvailableNo Spare Drive Available Manual RebuildFinding the Failed Physical Drive Identifying an Offline Logical DriveRAID 1, 5, 6, 10, 50 RAID Spare Drive Management Viewing Spare DrivesViewing Spare Drive Information Creating a Spare DriveChanging Spare Drive Settings Deleting a Spare Drive Background Activity Event Log Viewing RAM EventsViewing Nvram Events Clearing the Event Logs Setting the Time Zone Time SyncSynchronizing Time with an Embedded Site Miscellaneous SAS Ready LEDsSgpio Backplane BuzzerEnabling or Disabling the Buzzer Page Management with WebPAM PRO Login Screen Management with WebPAM PRO Accessing the Interface WebPAM PRO interfaceUsing the Header Using Tree ViewUsing Management View WebPAM PRO Tree ViewChoosing a Display Language Viewing the Event FrameSaving the Event Frame Deleting the Event FrameViewing the Storage Network Logging out of WebPAM PRO Storage Network appears in Tree ViewMaking User Settings Managing UsersViewing User Information Making Your Own User Settings Changing a User’s PasswordChanging Your Own Password Creating a User Deleting a UserList of User Privileges Management with WebPAM PRO Working with Subsystem/Host Management Viewing Subsystem/Host InformationAdding a Subsystem or Host Setting User Privilege Deleting a Subsystem or HostIn-Band versus Out-of-Band Page Managing Software Services Viewing Service StatusChanging Web Server Settings Setting up Email Service Restarting the Tomcat ServerWindows LinuxSetting up Extended Smtp Setting Event Frame Refresh TimeSending a Test Email Message Changing CIM Client Settings Changing CIM Server SettingsSetting User Rights Managing the HostViewing Host Information Refreshing the WebPAM PRO ScreenManaging the Subsystem Viewing Subsystem InformationClearing Statistical Data Setting an Alias for the Subsystem Updating the FirmwareClick the Clear Statistics link Checking Subsystem Health Viewing the Runtime Event LogSaving the Runtime Event Log Severity DefinitionsClearing the Runtime Event Log Viewing the Nvram Event LogSaving the Nvram Event Log Clearing the Nvram Event LogViewing Current Background Activities Making Background Activity Settings Running Background Activities Running Media PatrolRunning PDM Viewing Scheduled Activities Scheduling an Activity112 Viewing System Configuration Deleting a Scheduled Activity114 Managing the Controller Viewing Controllers InformationViewing Controller Information 116 Making Controller Settings Viewing Controller StatisticsViewing Battery Information Clearing an Orphan WatermarkMaking Buzzer Settings Testing the BuzzerSilencing the Buzzer Viewing Buzzer Information Managing Enclosures Viewing Enclosure InformationManaging Physical Drives Viewing a List of Physical DrivesLocating a Physical Drive Virtual or Third Party EnclosuresMaking Global Physical Drive Settings Promise EnclosuresSata Drives SAS Drives Making Physical Drive Settings Adjustable ItemsViewing Physical Drive Statistics Forcing a Physical Drive Offline or Online Clearing Stale and PFA Conditions126 Managing Disk Arrays Locating a Disk Array128 Creating a Disk Array Automatic Configuration Creating a Disk Array Express Configuration 131 Creating a Disk Array Advanced Configuration Disk Array CreationLogical Drive Creation Summary Disk Array Operational Status Making Disk Array Settings Physical Drive Status136 137 Migrating a Disk Array Rebuilding Automatically Rebuilding ManuallyRunning Media Patrol on a Disk Array Running PDM on a Disk ArrayTransitioning a Disk Array Preparing a Disk Array for Transport142 Managing Logical Drives Viewing Information for All Logical DrivesLogical Drive Status Locating a Logical Drive Logical Drive SynchronizationViewing Logical Drive Statistics 146 Running Redundancy Check Viewing the Logical Drive Check Table148 Managing Spare Drives Viewing a List of Spare Drives150 Making Spare Drive Settings Deleting Spare DriveRunning Spare Check Working with the Logical Drive Summary Viewing a List of All Logical DrivesViewing Individual Logical Drive Information 154 Technology Background Introduction to RAIDRAID 0 Stripe RAID 0 Striping interleaves data across multiple drivesRAID 1 Mirror RAID 1 Mirrors identical data to two drivesRAID 1E Enhanced Mirror Enhanced Data Mirrors Physical DrivesRAID 5 Block Striping with Distributed Parity RAID 5 stripes all drives with data and parity informationRAID 6 Block and Double Parity Stripe RAID 6 stripes all drives with data and dual parityRAID 10 Mirror / Stripe Data Stripe Mirror Physical DrivesRAID 50 Striped Distributed Parity Component Minimum MaximumRAID 50 Axles 3,3,3 RAID 60 Striping of Double Parity RAID 60 is a combination of RAID 6 and RAIDRAID 60 Axles 5,5 10,10 4,4,4 167 Choosing a RAID Level Advantages DisadvantagesRAID 1E 170 High Read data transaction rate Choosing Stripe Block Size Choosing Sector SizeChoosing Cache Policy TB LimitationLogical Drive Size Sector Size Capacity Coercion Read Cache PolicyWrite Cache Policy Initialization Hot Spare DrivesPartition and Format the Logical Drive RAID Level MigrationTarget Requirements None Add physical drives maximum RAID 10 must have less than 16 physical drives Physical drives maximum Ranges of Disk Array Expansion PDMDelete and Recreate Current LD Size Maximum LD Sector Size Expansion SizeMedia Patrol Predictive Data Migration PDMPDM Triggers Transition Drive Failure and Automatic Rebuild186 Automatic Transition Manual Transition188 When a Physical Drive Fails Critical & Offline Logical Drives190 With a Hot Spare Drive Without a Hot Spare DriveRebuild Operation 192 Frequently Asked Questions Pre-Installation Speed, Device Types, Capacity, CablingHow can I change the resources that the SuperTrak uses? Drive Issues Can I use Atapi devices on the SuperTrak EX Series?Will Acpi work with HDDs on the SuperTrak EX Series? Support Installation Issues Capacity, Booting Post-InstallationWhy can’t I make a dedicated spare drive in WebPAM PRO? Technical Support Services Why can’t I run WebPAM PRO in Konqueror?Contacting Technical Support United StatesNetherlands GermanyItaly Limited Warranty TaiwanChina Disclaimer of other warranties Returning the Product For Repair Your ResponsibilitiesOr retailer Appendix a Partition and Format Click the Next button to start the Wizard Appendix a Partition and Format 206 Updating SuperTrak Bios and Firmware Downloading Bios and Firmware FileDownloading the WebPAM PRO Update File Installing the WebPAM PRO Update FileUpdating WebPAM PRO Logging into WebPAM PROAppendix C Battery Backup Unit Installing the BBU SuperTrak EX Controller 212 Index Numerics214 146 Axles 66 Capacity 18, 65, 132 List 59 150 List 73 Logical drive 65, 67, 133

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