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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 information Contents Setup Management with WebPAM PRO Management with the CLU Technology Background Index TroubleshootingSupport Appendix a Useful Information About This Manual Introduction VTrak M500f/i/p front view Overview VTrak M500f Rear View M500i/p have different controllers Architectural Description Feature Benefit Features and Benefits Allows you to manage the RAID subsystem M500f/i/p Specifications Novell Netware M300f/i/p, M200f/i/p FCC Statement VTrak M-Class Product Manual Unpack the VTrak Installation Rackmounted VTrak M500f/i/p Mount VTrak M500f/i/p in a Rack Installation Rackmounted VTrak M300f/i/p M200f/i/p is similar Mount VTrak M300f/i/p or M200f/i/p in a Rack Installation Drives Install Disk Drives M500f/i/p drive carrier mounting holes Sata Disk Drives mount at the front of the carrier Drive Numbering VTrak disk drives are numbered left to right Fibre Channel Storage Area Network Set Up Network Cable Connections VTrak M500f DAS connections M300f and M200f are similar Fibre Channel Direct Attached Storage VTrak M300i and M200i SAN connections M500i is similar ISCSI Storage Area Network VTrak M300i and M200i DAS connections M500i is similar ISCSI Direct Attached Storage Scsi HBA Scsi Direct Attached Storage Serial connectors for VTrak M500f left and M300i right Set Up Serial Cable Connections SCSI-1 SCSI-2 Connect the Power VTrak M500f/i/p drive carrier LEDs VTrak M-Class Product Manual VTrak Setup with CLI or CLU Setup CLI 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=enable System Date and Time CLU Fibre Channel and Scsi Models M500f/p, M300f/p, M200f/p Management Port Exit the CLU CLU iSCSI Models M500i, M300i, M200i System Date and Time VTrak M-Class Product Manual ISCSI Ports Exit the CLU Software-based iSCSI Initiator Install iSCSI Initiator on the Host PC VTrak M-Class Product Manual Secure Connection VTrak Setup with WebPAM PROeLog-in to WebPAM PROe Regular Connection VTrak M-Class Product Manual Setup Language Selection Automatic Create a Disk Array Express Setup Advanced Setup VTrak M-Class Product Manual Setup VTrak M-Class Product Manual Setup Log-out of WebPAM PROe Additional Logical Drives Internet Connection using WebPAM PROe VTrak M-Class Product Manual Management with WebPAM PROe VTrak Status Indicators VTrak M300f/i/p and M200f/i/p front panel LED display State LEDs Dark Steady Flashing Amber Red Green Drive Status Indicators Steady 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 Selection Contact Us Storage Network Tree View Event Frame SubsystemsManagement Window Subsystem Information Subsystem SettingsSubsystem Save Events Subsystem EventsView Events Clear Events Start Background Function Change Background SettingsBackground Activities Schedule an Activity SchedulerView Scheduled Activities Delete an Activity Renew Lock LockView Lock Status Set Lock Release Lock Administrative ToolsUser Management User Information User Settings AdministratorUser Settings User User Event Subscription Smart List of User Notification Events Create a User User Password AdministratorUser Password Users List of User Privileges Delete a User User Sessions Network Management ISCSI Data Ports Fibre Channel Node Fibre Channel Management Fibre Channel Port Fibre Channel Port Settings Fibre Channel Statistics Fibre Channel SFP Fibre Channel Initiators Fibre Channel Logged-in Devices ISCSI Node ISCSI Management ISCSI Ports ISCSI Port Statistics ISCSI Sessions Click the iSNS Port 1 or iSNS Port 2 link ISCSI iSNS View CHAPs ISCSI SLPISCSI Chap Delete a Chap Add a ChapEdit a Chap Scsi Channel Information Scsi Channel SettingsScsi Management ISCSI Ping Scsi Target Information Delete an Initiator Storage ServicesInitiators Add an Initiator Edit a LUN Map Enable LUN MaskingLUN Map Fibre Channel and iSCSI View LUN Map LUN Mapping Parameters LUN Map Scsi Software Management Manual Start, Restart, Stop Change Email SettingSend a Test Message Web Server Click on the Web Server Setting link Telnet Change Start Setting Snmp 105 CIM CIM Service Settings Netsend Delete Recipients Add Recipients Import Export Restore Factory Defaults Firmware Update Shutdown Clear StatisticsShutdown and Restart Monitor the Restart Monitor the ShutdownRestart the Subsystem Controllers Controller Information Controller 115 Clear Statistics Controller SettingsController Statistics Enclosures VTrak M500f is show above, The M500i/p are similar Identify Enclosure Enclosure Information Enclosure SettingsEnclosure FRU VPD Battery Silence 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 Statistics Clear Physical Drive Conditions Physical Drive Settings Force a Physical Drive Offline/Online Physical Drive Media Patrol Disk Arrays Create a Disk Array Express Create a Disk Array Automatic 130 Logical Drive Creation Create a Disk Array AdvancedDisk Array Creation Summary Delete a Disk Array Disk Array Information Disk Array Disk Array Status Physical Drives in the Disk ArrayLogical Drives in the Disk Array Create a Logical Drive Disk Array Settings 136 Disk Array Migration Delete a Logical Drive Disk Array Rebuild Manual Rebuild Disk Array Background Activity View Progress of Background Function Transition Transport Logical Drives Logical Drive Status Logical Drive Information Logical Drive Logical Drive Statistics in alphabetical order Logical Drive Settings Logical Drive Initialization Logical Drive Background Activity Logical Drive Synchronization Logical Drive Redundancy Check Logical Drive Check Table Logical Drive PDM Logical Drive LUN Settings iSCSI and Fibre Channel Logical Drive LUN Settings Scsi Spare Drives Create Spare Drive Spare Check All Spare Drives Delete Spare Drive Locate a Spare Drive Spare DriveSpare Drive Information Spare Drive Settings Spare Check Individual Spare Drive Logical Drive Summary VTrak M-Class Product Manual 156 Management with the CLU 158 Management with the CLU 160 Telnet 192.168.1.56 CLU ConnectionSerial Connection Telnet Connection 162 Exit the CLU CLU Function Map 165 166 167 168 169 170 171 172 Media Patrol Quick SetupSubsystem Management Alias Controller Management Controller SettingsSystem Date and Time Physical Drive Coercion Alias Enclosure Management Power Supply UnitsEnclosure Management Enclosure Status Polling Interval Enclosure SettingsTemperature Sensors Voltage Sensors Batteries Temperature Thresholds Locate Enclosure Global Physical Drive SettingsPhysical Drive Management Physical Drive Statistics Individual Physical Drive SettingsCommand Queuing Advanced Information Locate Physical Drive Force Physical Drive Offline/Online Disk Array Management Highlight Save Settings and Continue and press Enter Delete a Disk Array Rebuild Disk Array Settings and FunctionsDisk Array Information Media Patrol Predictive Data Migration Migration Accept Incomplete Array Locate Disk ArrayCreate a Logical Drive Delete a Logical Drive Logical Drive Management Read Cache Policy Logical Drive Settings and FunctionsLogical Drive Information Write Cache Policy Redundancy Check Locate Logical Drive Manual Management Port SettingsISCSI Port Settings Network Management Logged-in Devices Fibre Channel ManagementNode Ports Port SFP Port Settings Port Statistics Fibre Channel Initiators ISCSI Management ISNS Sessions Delete a Chap PingAdd a Chap Channel Information Channel SettingsScsi Management Target Information Background Activity Background Activities List Background Activity Settings Nvram Events Event ViewerRuntime Events Create New Spare Drive Additional Info and ManagementSpare Drive Management Delete Spare Drive LUN Mapping Fibre Channel and iSCSI Map a LUN to an Initiator LUN Mapping ScsiCreate New Initiator Delete Initiator Create 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 Recipients Flash through Tftp Restart over Telnet Shutdown over TelnetShutdown over Serial Restart over Serial Buzzer Maintenance 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 Background RAID 0 Striping interleaves data across multiple drives RAID 0 Stripe Data Mirror Disk Drives RAID 1 Mirror RAID 1E Enhanced Mirror RAID 5 Stripes all drives with data and parity information RAID 5 Block and Parity Stripe RAID 10 Mirror + Stripe RAID 50 Axles RAID 50 Striping of Distributed Parity Per Axle No. of Drives No. of Axles RAIDArray Advantages Disadvantages Choosing a RAID Level RAID 1E 249 Sector Size Stripe Size Read Cache Policy Cache Policy Cache Line Size Capacity CoercionWrite Cache Policy Hot Spare Drives Initialization Add Lose Partition and Format the Logical DriveRAID Level Migration From Increase Redundancy Capacity RAID 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 Transition VTrak is Beeping Troubleshooting Front Panel LEDs Display Amber or Red FC/iSCSI Activity Scsi 1 or Drive Status Indicators Back of Enclosure Battery and fan LEDs VTrak M500f/i/p Dark Green Amber Red Battery and fan LEDs VTrak M300f/i/p and M200f/i/p Green Amber Flashing VTrak iSCSI controller DA2 CLU Reports a Problem WebPAM PROe Reports a Problem 270 Event Action BatteryEvent Notification Response Blowers Drive Interface Controller CacheController Disk Array Host Interface Controller EnclosureEvent Log Host-interface controller is Logical Drive Fibre ChannelISCSI Media Patrol Physical Disk PDM Physical disk negotiation PSU Fans RAID Level Migration Redundancy Check Rebuild Spare Drives ResourceSEP Storage Enclosure Processor Spare Check Synchronization Stripe Level Migration Watermark System VTrakTransition With a Hot Spare Drive When a Disk Drive FailsCritical & Offline Disk Arrays Rebuild Operation Without a Hot Spare Drive Status Activity Enclosure Problems Overheating Power Supplies Termination Connection ProblemsScsi Connections Serial Connections ISCSI Connections Amber Green Flashing Green Network Connections Unsaved 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 Support Italy United StatesEurope, Africa, Middle East Germany China Taiwan Disclaimer of other warranties Limited Warranty Your Responsibilities Returning Product For Repair Or retailer Pin Signal Serial Connector Pinout Compliance 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