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Promise Technology M200f, M500i, M500f, M300p, M500p, M300i, M300f manual RAID 5 Block and Parity Stripe

Models: M500i M200f M300f M200p M500p M300p M200i M500f M300i

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Chapter 7: Technology Background

RAID 5 – Block and Parity Stripe

RAID 5 organizes block data and parity data across the physical drives. Generally, RAID Level 5 tends to exhibit lower random write performance due to the heavy workload of parity recalculation for each I/O. RAID 5 is generally considered to be the most versatile RAID level

Distributed Parity

Data

Blocks

Disk Drives

Figure 3. RAID 5 Stripes all drives with data and parity information

The capacity of a RAID 5 disk array is the smallest drive size multiplied by the number of drives less one. Hence, a RAID 5 disk array with (4) 100 GB hard drives will have a capacity of 300GB. A disk array with (8) 120GB hard drives and

(1)100GB hard drive will have a capacity of 800GB. RAID 5 arrays consist of three or more physical drives.

Recommended applications: File and Application Servers; WWW, E-mail, News servers, Intranet Servers

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Promise Technology M200f, M500i RAID 5 Block and Parity Stripe, RAID 5 Stripes all drives with data and parity information

Contents

Vtrak Recommendations CopyrightTrademarks Important data protection informationContents Setup Management with WebPAM PRO Management with the CLU Technology Background Index TroubleshootingSupport Appendix a Useful InformationAbout This Manual IntroductionVTrak M500f/i/p front view OverviewVTrak M500f Rear View M500i/p have different controllers Architectural DescriptionFeature Benefit Features and BenefitsAllows you to manage the RAID subsystem M500f/i/p SpecificationsNovell Netware M300f/i/p, M200f/i/p FCC Statement VTrak M-Class Product Manual Unpack the VTrak InstallationRackmounted VTrak M500f/i/p Mount VTrak M500f/i/p in a RackInstallation Rackmounted VTrak M300f/i/p M200f/i/p is similar Mount VTrak M300f/i/p or M200f/i/p in a RackInstallation Drives Install Disk DrivesM500f/i/p drive carrier mounting holes Sata Disk Drives mount at the front of the carrier Drive NumberingVTrak disk drives are numbered left to right Fibre Channel Storage Area Network Set Up Network Cable ConnectionsVTrak M500f DAS connections M300f and M200f are similar Fibre Channel Direct Attached StorageVTrak M300i and M200i SAN connections M500i is similar ISCSI Storage Area NetworkVTrak M300i and M200i DAS connections M500i is similar ISCSI Direct Attached StorageScsi HBA Scsi Direct Attached StorageSerial connectors for VTrak M500f left and M300i right Set Up Serial Cable ConnectionsSCSI-1 SCSI-2 Connect the PowerVTrak M500f/i/p drive carrier LEDs VTrak M-Class Product Manual VTrak Setup with CLI or CLU SetupCLI iSCSI Models M500i, M300i, M200i Administrator@cli net -a mod -t mgmt -s dhcp=enableCLI Fibre Channel and Scsi Models M500f/p, M300f/p, M200f/p ISCSI 0.0 Administrator@cli net -a mod -t iSCSI -p 1 -s dhcp=enableSystem Date and Time CLU Fibre Channel and Scsi Models M500f/p, M300f/p, M200f/pManagement Port Exit the CLU CLU iSCSI Models M500i, M300i, M200iSystem Date and Time VTrak M-Class Product Manual ISCSI Ports Exit the CLU Software-based iSCSI Initiator Install iSCSI Initiator on the Host PCVTrak M-Class Product Manual Secure Connection VTrak Setup with WebPAM PROeLog-in to WebPAM PROe Regular ConnectionVTrak M-Class Product Manual Setup Language Selection Automatic Create a Disk ArrayExpress Setup Advanced Setup VTrak M-Class Product Manual Setup VTrak M-Class Product Manual Setup Log-out of WebPAM PROe Additional Logical DrivesInternet Connection using WebPAM PROe VTrak M-Class Product Manual Management with WebPAM PROe VTrak Status IndicatorsVTrak M300f/i/p and M200f/i/p front panel LED display State LEDs Dark Steady Flashing Amber Red Green Drive Status IndicatorsSteady Flashing Amber Red Green Audible AlarmLEDs State Https//192.168.10.148 Log-in/Log-outHttp//192.168.10.148 VTrak M-Class Product Manual WebPAM PROe Opening Screen Graphic User Interface View HeaderFunction Language SelectionContact Us Storage NetworkTree View Event Frame SubsystemsManagement Window Subsystem Information Subsystem SettingsSubsystem Save Events Subsystem EventsView Events Clear EventsStart Background Function Change Background SettingsBackground Activities Schedule an Activity SchedulerView Scheduled Activities Delete an Activity Renew Lock LockView Lock Status Set LockRelease Lock Administrative ToolsUser Management User Information User Settings AdministratorUser Settings User User Event Subscription Smart List of User Notification EventsCreate a User User Password AdministratorUser Password Users List of User Privileges Delete a UserUser Sessions Network ManagementISCSI Data Ports Fibre Channel Node Fibre Channel ManagementFibre Channel Port Fibre Channel Port SettingsFibre Channel Statistics Fibre Channel SFP Fibre Channel Initiators Fibre Channel Logged-in DevicesISCSI Node ISCSI ManagementISCSI Ports ISCSI Port Statistics ISCSI Sessions Click the iSNS Port 1 or iSNS Port 2 link ISCSI iSNSView CHAPs ISCSI SLPISCSI Chap Delete a Chap Add a ChapEdit a Chap Scsi Channel Information Scsi Channel SettingsScsi Management ISCSI PingScsi Target Information Delete an Initiator Storage ServicesInitiators Add an InitiatorEdit a LUN Map Enable LUN MaskingLUN Map Fibre Channel and iSCSI View LUN MapLUN Mapping Parameters LUN Map ScsiSoftware Management Manual Start, Restart, Stop Change Email SettingSend a Test Message Web Server Click on the Web Server Setting linkTelnet Change Start SettingSnmp 105 CIM CIM Service SettingsNetsend Delete Recipients Add RecipientsImport ExportRestore Factory Defaults Firmware UpdateShutdown Clear StatisticsShutdown and Restart Monitor the Restart Monitor the ShutdownRestart the Subsystem Controllers Controller Information Controller115 Clear Statistics Controller SettingsController Statistics Enclosures VTrak M500f is show above, The M500i/p are similar Identify EnclosureEnclosure Information Enclosure SettingsEnclosure FRU VPD BatterySilence Buzzer Battery ReconditionBuzzer Identify a Physical Drive Change Buzzer SettingsPhysical Drives Physical Drives Settings Advanced Physical Drive Information Physical DrivePhysical Drive Information Identify a Physical Drive Physical Drive StatisticsClear Physical Drive Conditions Physical Drive SettingsForce a Physical Drive Offline/Online Physical Drive Media Patrol Disk ArraysCreate a Disk Array Express Create a Disk Array Automatic130 Logical Drive Creation Create a Disk Array AdvancedDisk Array Creation Summary Delete a Disk ArrayDisk Array Information Disk ArrayDisk Array Status Physical Drives in the Disk ArrayLogical Drives in the Disk Array Create a Logical Drive Disk Array Settings136 Disk Array Migration Delete a Logical DriveDisk Array Rebuild Manual Rebuild Disk Array Background ActivityView Progress of Background Function TransitionTransport Logical DrivesLogical Drive Status Logical Drive Information Logical DriveLogical Drive Statistics in alphabetical order Logical Drive SettingsLogical Drive Initialization Logical Drive Background ActivityLogical Drive Synchronization Logical Drive Redundancy CheckLogical Drive Check Table Logical Drive PDMLogical Drive LUN Settings iSCSI and Fibre Channel Logical Drive LUN Settings Scsi Spare Drives Create Spare Drive Spare Check All Spare Drives Delete Spare DriveLocate a Spare Drive Spare DriveSpare Drive Information Spare Drive Settings Spare Check Individual Spare Drive Logical Drive SummaryVTrak M-Class Product Manual 156 Management with the CLU 158 Management with the CLU 160 Telnet 192.168.1.56 CLU ConnectionSerial Connection Telnet Connection162 Exit the CLU CLU Function Map 165 166 167 168 169 170 171 172 Media Patrol Quick SetupSubsystem Management AliasController Management Controller SettingsSystem Date and Time Physical Drive Coercion AliasEnclosure Management Power Supply UnitsEnclosure Management Enclosure StatusPolling Interval Enclosure SettingsTemperature Sensors Voltage SensorsBatteries Temperature ThresholdsLocate Enclosure Global Physical Drive SettingsPhysical Drive Management Physical Drive Statistics Individual Physical Drive SettingsCommand Queuing Advanced InformationLocate Physical Drive Force Physical Drive Offline/OnlineDisk Array Management Highlight Save Settings and Continue and press Enter Delete a Disk Array Rebuild Disk Array Settings and FunctionsDisk Array Information Media PatrolPredictive Data Migration MigrationAccept Incomplete Array Locate Disk ArrayCreate a Logical Drive Delete a Logical Drive Logical Drive ManagementRead Cache Policy Logical Drive Settings and FunctionsLogical Drive Information Write Cache PolicyRedundancy Check Locate Logical DriveManual Management Port SettingsISCSI Port Settings Network ManagementLogged-in Devices Fibre Channel ManagementNode PortsPort SFP Port SettingsPort Statistics Fibre Channel InitiatorsISCSI Management ISNS SessionsDelete a Chap PingAdd a Chap Channel Information Channel SettingsScsi Management Target Information Background ActivityBackground Activities List Background Activity SettingsNvram Events Event ViewerRuntime Events Create New Spare Drive Additional Info and ManagementSpare Drive Management Delete Spare Drive LUN Mapping Fibre Channel and iSCSIMap a LUN to an Initiator LUN Mapping ScsiCreate New Initiator Delete InitiatorCreate New User User Settings Privilege and Status PasswordUser Settings Display Name and Email Address Delete User Webserver 209 Snmp Trap Sinks Highlight Create New Message Recipient and press Enter Netsend RecipientsFlash through Tftp Restart over Telnet Shutdown over TelnetShutdown over Serial Restart over Serial BuzzerMaintenance Mgmt Your PC Firmware Update WebPAM PROeTftp Server Restart VTrak Firmware Update CLU Replace Power Supply All Models Replace Cooling Unit Fan M500f/i/p Disconnect 223 224 225 Replace Cooling Unit Fan M300f/i/p and M200f/i/p Thumbscrew 228 229 Replace Cache Battery M500f/i/p Detach 232 Replace Cache Battery M300f/i/p and M200f/i/p 234 Replace SEP M500f/i/p Replace SEP M300f/i/p and M200f/i/p Replace RAID Controller All Models VTrak M-Class Product Manual 238 Introduction to RAID Technology BackgroundRAID 0 Striping interleaves data across multiple drives RAID 0 StripeData Mirror Disk Drives RAID 1 MirrorRAID 1E Enhanced Mirror RAID 5 Stripes all drives with data and parity information RAID 5 Block and Parity StripeRAID 10 Mirror + Stripe RAID 50 Axles RAID 50 Striping of Distributed ParityPer Axle No. of Drives No. of Axles RAIDArray Advantages Disadvantages Choosing a RAID LevelRAID 1E 249 Sector Size Stripe SizeRead Cache Policy Cache PolicyCache Line Size Capacity CoercionWrite Cache Policy Hot Spare Drives InitializationAdd Lose Partition and Format the Logical DriveRAID Level Migration From Increase Redundancy CapacityRAID RAID 1/1E Create a New Logical Drive Ranges of Disk Array ExpansionCurrent LD Size Maximum LD Sector Size Expansion Size PDM Triggers Media PatrolPredictive Data Migration PDM Transition Example Manual Transition Automatic TransitionVTrak is Beeping TroubleshootingFront Panel LEDs Display Amber or RedFC/iSCSI Activity Scsi 1 or Drive Status Indicators Back of Enclosure Battery and fan LEDs VTrak M500f/i/pDark Green Amber Red Battery and fan LEDs VTrak M300f/i/p and M200f/i/pGreen Amber Flashing VTrak iSCSI controllerDA2 CLU Reports a ProblemWebPAM PROe Reports a Problem 270 Event Action BatteryEvent Notification Response Blowers Drive Interface Controller CacheController Disk ArrayHost Interface Controller EnclosureEvent Log Host-interface controller is Logical Drive Fibre ChannelISCSI Media Patrol Physical Disk PDMPhysical disk negotiation PSU Fans RAID Level Migration Redundancy Check RebuildSpare Drives ResourceSEP Storage Enclosure Processor Spare CheckSynchronization Stripe Level MigrationWatermark System VTrakTransition With a Hot Spare Drive When a Disk Drive FailsCritical & Offline Disk Arrays Rebuild Operation Without a Hot Spare DriveStatus Activity Enclosure Problems Overheating Power Supplies Termination Connection ProblemsScsi Connections Serial Connections ISCSI ConnectionsAmber Green Flashing Green Network ConnectionsUnsaved Data in the Controller Cache VTrak M-Class Product Manual 296 What kind of disk drives can I use with VTrak? Frequently Asked QuestionsHow can I tell when the VTrak has fully booted? Why does VTrak come with a Command Line Utility?Are logical drives on VTrak limited to 2.199 terabytes? How can I be sure everything is working OK on the VTrak? Technical Support ServicesCan VTrak run using just one power supply? Contact Technical SupportItaly United StatesEurope, Africa, Middle East GermanyChina TaiwanDisclaimer of other warranties Limited WarrantyYour Responsibilities Returning Product For RepairOr retailer Pin Signal Serial Connector PinoutCompliance Statement Snmp MIB FilesLoad MIB Files Index CLU 32 Dead 135 Activity LED 26, 58, 158 Activity LED 26, 58, 158, 263 Chap 93 CLU 33 RAID 0 240 RAID 1 241, 247 Stale 135 193 Transition 140, 187